diff --git a/doc/pub/week39/html/week39-reveal.html b/doc/pub/week39/html/week39-reveal.html
index 18053e6ba..c5f0e3dd7 100644
--- a/doc/pub/week39/html/week39-reveal.html
+++ b/doc/pub/week39/html/week39-reveal.html
@@ -1810,7 +1810,7 @@ lmbda  = <span style="color: #B452CD">0.001</span>
 Id = n*lmbda* np.eye(XT_X.shape[<span style="color: #B452CD">0</span>])
 
 <span style="color: #228B22"># Hessian matrix</span>
-H = (<span style="color: #B452CD">2.0</span>/n)* XT_X+<span style="color: #B452CD">2</span>*lmbda
+H = (<span style="color: #B452CD">2.0</span>/n)* XT_X+<span style="color: #B452CD">2</span>*lmbda* np.eye(XT_X.shape[<span style="color: #B452CD">0</span>])
 <span style="color: #228B22"># Get the eigenvalues</span>
 EigValues, EigVectors = np.linalg.eig(H)
 <span style="color: #658b00">print</span>(<span style="color: #CD5555">f&quot;Eigenvalues of Hessian Matrix:{</span>EigValues<span style="color: #CD5555">}&quot;</span>)
diff --git a/doc/pub/week39/html/week39-solarized.html b/doc/pub/week39/html/week39-solarized.html
index d11927c73..01032d649 100644
--- a/doc/pub/week39/html/week39-solarized.html
+++ b/doc/pub/week39/html/week39-solarized.html
@@ -1752,7 +1752,7 @@ lmbda  = <span style="color: #B452CD">0.001</span>
 Id = n*lmbda* np.eye(XT_X.shape[<span style="color: #B452CD">0</span>])
 
 <span style="color: #228B22"># Hessian matrix</span>
-H = (<span style="color: #B452CD">2.0</span>/n)* XT_X+<span style="color: #B452CD">2</span>*lmbda
+H = (<span style="color: #B452CD">2.0</span>/n)* XT_X+<span style="color: #B452CD">2</span>*lmbda* np.eye(XT_X.shape[<span style="color: #B452CD">0</span>])
 <span style="color: #228B22"># Get the eigenvalues</span>
 EigValues, EigVectors = np.linalg.eig(H)
 <span style="color: #658b00">print</span>(<span style="color: #CD5555">f&quot;Eigenvalues of Hessian Matrix:{</span>EigValues<span style="color: #CD5555">}&quot;</span>)
diff --git a/doc/pub/week39/html/week39.html b/doc/pub/week39/html/week39.html
index b39dde8d9..df5e22ed6 100644
--- a/doc/pub/week39/html/week39.html
+++ b/doc/pub/week39/html/week39.html
@@ -1829,7 +1829,7 @@ lmbda  <span style="color: #666666">=</span> <span style="color: #666666">0.001<
 Id <span style="color: #666666">=</span> n<span style="color: #666666">*</span>lmbda<span style="color: #666666">*</span> np<span style="color: #666666">.</span>eye(XT_X<span style="color: #666666">.</span>shape[<span style="color: #666666">0</span>])
 
 <span style="color: #408080; font-style: italic"># Hessian matrix</span>
-H <span style="color: #666666">=</span> (<span style="color: #666666">2.0/</span>n)<span style="color: #666666">*</span> XT_X<span style="color: #666666">+2*</span>lmbda
+H <span style="color: #666666">=</span> (<span style="color: #666666">2.0/</span>n)<span style="color: #666666">*</span> XT_X<span style="color: #666666">+2*</span>lmbda<span style="color: #666666">*</span> np<span style="color: #666666">.</span>eye(XT_X<span style="color: #666666">.</span>shape[<span style="color: #666666">0</span>])
 <span style="color: #408080; font-style: italic"># Get the eigenvalues</span>
 EigValues, EigVectors <span style="color: #666666">=</span> np<span style="color: #666666">.</span>linalg<span style="color: #666666">.</span>eig(H)
 <span style="color: #008000">print</span>(<span style="color: #BA2121">f&quot;Eigenvalues of Hessian Matrix:</span><span style="color: #BB6688; font-weight: bold">{</span>EigValues<span style="color: #BB6688; font-weight: bold">}</span><span style="color: #BA2121">&quot;</span>)
diff --git a/doc/pub/week39/ipynb/ipynb-week39-src.tar.gz b/doc/pub/week39/ipynb/ipynb-week39-src.tar.gz
index 47ca9b95d..80ec2fb18 100644
Binary files a/doc/pub/week39/ipynb/ipynb-week39-src.tar.gz and b/doc/pub/week39/ipynb/ipynb-week39-src.tar.gz differ
diff --git a/doc/pub/week39/ipynb/week39.ipynb b/doc/pub/week39/ipynb/week39.ipynb
index ea68590e1..f6f0b3473 100644
--- a/doc/pub/week39/ipynb/week39.ipynb
+++ b/doc/pub/week39/ipynb/week39.ipynb
@@ -2,7 +2,7 @@
  "cells": [
   {
    "cell_type": "markdown",
-   "id": "4da18cbd",
+   "id": "de52ab2c",
    "metadata": {
     "editable": true
    },
@@ -14,7 +14,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "eeefca75",
+   "id": "852fb5f5",
    "metadata": {
     "editable": true
    },
@@ -29,7 +29,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "464181a8",
+   "id": "8d300952",
    "metadata": {
     "editable": true
    },
@@ -55,7 +55,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "26702e1b",
+   "id": "6d9c9efb",
    "metadata": {
     "editable": true
    },
@@ -67,7 +67,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "31f56ea9",
+   "id": "0672e884",
    "metadata": {
     "editable": true
    },
@@ -86,7 +86,7 @@
   {
    "cell_type": "code",
    "execution_count": 1,
-   "id": "282e7573",
+   "id": "a91f4b13",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -143,7 +143,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1f8dcd12",
+   "id": "1cc7156d",
    "metadata": {
     "editable": true
    },
@@ -155,7 +155,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "980d6f9f",
+   "id": "f82c0e28",
    "metadata": {
     "editable": true
    },
@@ -170,7 +170,7 @@
   {
    "cell_type": "code",
    "execution_count": 2,
-   "id": "55700b74",
+   "id": "3e136826",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -223,7 +223,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c1c0b353",
+   "id": "12359ccb",
    "metadata": {
     "editable": true
    },
@@ -238,7 +238,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6aea3ae5",
+   "id": "703cf65f",
    "metadata": {
     "editable": true
    },
@@ -258,7 +258,7 @@
   {
    "cell_type": "code",
    "execution_count": 3,
-   "id": "8ae8373e",
+   "id": "5c2a058b",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -312,7 +312,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c915f004",
+   "id": "dee30ccc",
    "metadata": {
     "editable": true
    },
@@ -331,7 +331,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f34656f4",
+   "id": "01530e9f",
    "metadata": {
     "editable": true
    },
@@ -348,7 +348,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a5be22bb",
+   "id": "183b9704",
    "metadata": {
     "editable": true
    },
@@ -363,7 +363,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "178e875b",
+   "id": "37018028",
    "metadata": {
     "editable": true
    },
@@ -373,7 +373,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d8d3ac0d",
+   "id": "5b9161d9",
    "metadata": {
     "editable": true
    },
@@ -389,7 +389,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "fad8f4a0",
+   "id": "45a7fdb3",
    "metadata": {
     "editable": true
    },
@@ -401,7 +401,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "31a4cebe",
+   "id": "59318dc7",
    "metadata": {
     "editable": true
    },
@@ -412,7 +412,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "5fa46307",
+   "id": "2bb87427",
    "metadata": {
     "editable": true
    },
@@ -424,7 +424,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "3a286ac5",
+   "id": "3801657e",
    "metadata": {
     "editable": true
    },
@@ -434,7 +434,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "490a9950",
+   "id": "602c1a6f",
    "metadata": {
     "editable": true
    },
@@ -448,7 +448,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b9148a9b",
+   "id": "bf3ab8e7",
    "metadata": {
     "editable": true
    },
@@ -460,7 +460,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1995aab9",
+   "id": "a183e3d5",
    "metadata": {
     "editable": true
    },
@@ -470,7 +470,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1a223dab",
+   "id": "08d7eebc",
    "metadata": {
     "editable": true
    },
@@ -482,7 +482,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "53bbf105",
+   "id": "7834a0d8",
    "metadata": {
     "editable": true
    },
@@ -494,7 +494,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "62940c9c",
+   "id": "0e4f6694",
    "metadata": {
     "editable": true
    },
@@ -514,7 +514,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7af3608a",
+   "id": "bd784119",
    "metadata": {
     "editable": true
    },
@@ -530,7 +530,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e245c4f5",
+   "id": "1c971d1b",
    "metadata": {
     "editable": true
    },
@@ -546,7 +546,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "92952cd4",
+   "id": "35a4d166",
    "metadata": {
     "editable": true
    },
@@ -557,7 +557,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "0a4611b1",
+   "id": "a80ede20",
    "metadata": {
     "editable": true
    },
@@ -569,7 +569,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "34b4fd1c",
+   "id": "318a0a08",
    "metadata": {
     "editable": true
    },
@@ -579,7 +579,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "916ebdc3",
+   "id": "79b0ae38",
    "metadata": {
     "editable": true
    },
@@ -591,7 +591,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "34ed3c1a",
+   "id": "b17a388e",
    "metadata": {
     "editable": true
    },
@@ -601,7 +601,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "2a839f6a",
+   "id": "66a91a56",
    "metadata": {
     "editable": true
    },
@@ -613,7 +613,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7227d5ad",
+   "id": "78f3baac",
    "metadata": {
     "editable": true
    },
@@ -635,7 +635,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "cc0cd17c",
+   "id": "39ad1e8c",
    "metadata": {
     "editable": true
    },
@@ -648,7 +648,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a4c827e2",
+   "id": "84da41c2",
    "metadata": {
     "editable": true
    },
@@ -661,7 +661,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4a3afce5",
+   "id": "7d9d28c2",
    "metadata": {
     "editable": true
    },
@@ -671,7 +671,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "31c3919d",
+   "id": "2396d542",
    "metadata": {
     "editable": true
    },
@@ -689,7 +689,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "eee0d72f",
+   "id": "a674eefc",
    "metadata": {
     "editable": true
    },
@@ -699,7 +699,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "95a1a016",
+   "id": "512e74e4",
    "metadata": {
     "editable": true
    },
@@ -714,7 +714,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6350db33",
+   "id": "3f9b1466",
    "metadata": {
     "editable": true
    },
@@ -724,7 +724,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "cd441666",
+   "id": "f59aca60",
    "metadata": {
     "editable": true
    },
@@ -738,7 +738,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e646b397",
+   "id": "2fa2166e",
    "metadata": {
     "editable": true
    },
@@ -748,7 +748,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d68308ae",
+   "id": "fb17ebb4",
    "metadata": {
     "editable": true
    },
@@ -762,7 +762,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ee2d12e5",
+   "id": "d3d92dc1",
    "metadata": {
     "editable": true
    },
@@ -777,7 +777,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "84bccb22",
+   "id": "00e0ec40",
    "metadata": {
     "editable": true
    },
@@ -794,7 +794,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "29f68d8e",
+   "id": "3c8b259c",
    "metadata": {
     "editable": true
    },
@@ -806,7 +806,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6b0ee8ea",
+   "id": "2ac24c8e",
    "metadata": {
     "editable": true
    },
@@ -820,7 +820,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "51ff4542",
+   "id": "5324c99e",
    "metadata": {
     "editable": true
    },
@@ -835,7 +835,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e175ea67",
+   "id": "dc1a2974",
    "metadata": {
     "editable": true
    },
@@ -847,7 +847,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "2b4d9a95",
+   "id": "24016f18",
    "metadata": {
     "editable": true
    },
@@ -858,7 +858,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "93b00ab9",
+   "id": "7da1de9c",
    "metadata": {
     "editable": true
    },
@@ -886,7 +886,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1d526da6",
+   "id": "76de1f0e",
    "metadata": {
     "editable": true
    },
@@ -908,7 +908,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d3bd8a33",
+   "id": "ce4f8111",
    "metadata": {
     "editable": true
    },
@@ -930,7 +930,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "52ef888e",
+   "id": "b54884b5",
    "metadata": {
     "editable": true
    },
@@ -942,7 +942,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "90229536",
+   "id": "847b775c",
    "metadata": {
     "editable": true
    },
@@ -979,7 +979,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8300b610",
+   "id": "605e6362",
    "metadata": {
     "editable": true
    },
@@ -1007,7 +1007,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "aeaa290c",
+   "id": "c560914a",
    "metadata": {
     "editable": true
    },
@@ -1037,7 +1037,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "61e1729b",
+   "id": "d17ecb27",
    "metadata": {
     "editable": true
    },
@@ -1057,7 +1057,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ce59b5e9",
+   "id": "1ab9d4f4",
    "metadata": {
     "editable": true
    },
@@ -1069,7 +1069,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "431fb139",
+   "id": "c9a33048",
    "metadata": {
     "editable": true
    },
@@ -1079,7 +1079,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "94f28109",
+   "id": "12e64923",
    "metadata": {
     "editable": true
    },
@@ -1091,7 +1091,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "3f741ebd",
+   "id": "ab685f44",
    "metadata": {
     "editable": true
    },
@@ -1103,7 +1103,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6cd3ad9d",
+   "id": "5408f0b0",
    "metadata": {
     "editable": true
    },
@@ -1115,7 +1115,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "457242c7",
+   "id": "948770b2",
    "metadata": {
     "editable": true
    },
@@ -1127,7 +1127,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b5ea41a6",
+   "id": "30214ae8",
    "metadata": {
     "editable": true
    },
@@ -1138,7 +1138,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "33126ac0",
+   "id": "61c1136e",
    "metadata": {
     "editable": true
    },
@@ -1151,7 +1151,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9de7dff0",
+   "id": "f2294a2e",
    "metadata": {
     "editable": true
    },
@@ -1163,7 +1163,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "19297191",
+   "id": "3fb5eafd",
    "metadata": {
     "editable": true
    },
@@ -1173,7 +1173,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9c36e158",
+   "id": "a3d8069f",
    "metadata": {
     "editable": true
    },
@@ -1185,7 +1185,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1872af43",
+   "id": "b988ee43",
    "metadata": {
     "editable": true
    },
@@ -1195,7 +1195,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f2d44bd2",
+   "id": "15d398b5",
    "metadata": {
     "editable": true
    },
@@ -1206,7 +1206,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a3b3df86",
+   "id": "70530c03",
    "metadata": {
     "editable": true
    },
@@ -1218,7 +1218,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c2ce932e",
+   "id": "afe7053f",
    "metadata": {
     "editable": true
    },
@@ -1230,7 +1230,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e92ac09f",
+   "id": "3ca18c80",
    "metadata": {
     "editable": true
    },
@@ -1242,7 +1242,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "99a543fd",
+   "id": "65fc37b0",
    "metadata": {
     "editable": true
    },
@@ -1253,7 +1253,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "22c1bddc",
+   "id": "105051de",
    "metadata": {
     "editable": true
    },
@@ -1264,7 +1264,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "45c4aff4",
+   "id": "1df9ace3",
    "metadata": {
     "editable": true
    },
@@ -1276,7 +1276,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ee9ff1e3",
+   "id": "aa3a4868",
    "metadata": {
     "editable": true
    },
@@ -1286,7 +1286,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "346c6251",
+   "id": "abd24903",
    "metadata": {
     "editable": true
    },
@@ -1298,7 +1298,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "92344c6f",
+   "id": "e02e437b",
    "metadata": {
     "editable": true
    },
@@ -1308,7 +1308,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "2fb7fc14",
+   "id": "a4e930d4",
    "metadata": {
     "editable": true
    },
@@ -1320,7 +1320,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6b591811",
+   "id": "e77f1392",
    "metadata": {
     "editable": true
    },
@@ -1330,7 +1330,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b09a499f",
+   "id": "1c386f65",
    "metadata": {
     "editable": true
    },
@@ -1342,7 +1342,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c8b008f1",
+   "id": "dbea410e",
    "metadata": {
     "editable": true
    },
@@ -1352,7 +1352,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f4376dec",
+   "id": "b8ebcdca",
    "metadata": {
     "editable": true
    },
@@ -1364,7 +1364,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ff1df46a",
+   "id": "cdde0e61",
    "metadata": {
     "editable": true
    },
@@ -1375,7 +1375,7 @@
   {
    "cell_type": "code",
    "execution_count": 4,
-   "id": "d58b27c6",
+   "id": "ffef5ad1",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1406,7 +1406,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "616a720b",
+   "id": "d4134df3",
    "metadata": {
     "editable": true
    },
@@ -1417,7 +1417,7 @@
   {
    "cell_type": "code",
    "execution_count": 5,
-   "id": "43e59db0",
+   "id": "59acf7b7",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1431,7 +1431,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f0c1e614",
+   "id": "3f7a4a83",
    "metadata": {
     "editable": true
    },
@@ -1442,7 +1442,7 @@
   {
    "cell_type": "code",
    "execution_count": 6,
-   "id": "e5ebe518",
+   "id": "1fcf7778",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1455,7 +1455,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "420b2027",
+   "id": "800a0d42",
    "metadata": {
     "editable": true
    },
@@ -1466,7 +1466,7 @@
   {
    "cell_type": "code",
    "execution_count": 7,
-   "id": "46fe7a08",
+   "id": "364116b1",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1484,7 +1484,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "418d462a",
+   "id": "3ab19813",
    "metadata": {
     "editable": true
    },
@@ -1495,7 +1495,7 @@
   {
    "cell_type": "code",
    "execution_count": 8,
-   "id": "0ce6ac29",
+   "id": "d56b2826",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1510,7 +1510,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "13796d41",
+   "id": "a4226299",
    "metadata": {
     "editable": true
    },
@@ -1520,7 +1520,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9e7a15cd",
+   "id": "e9cd109f",
    "metadata": {
     "editable": true
    },
@@ -1534,7 +1534,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "366f9619",
+   "id": "ca85844f",
    "metadata": {
     "editable": true
    },
@@ -1546,7 +1546,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8d44f085",
+   "id": "3595e062",
    "metadata": {
     "editable": true
    },
@@ -1557,7 +1557,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f889def7",
+   "id": "73777697",
    "metadata": {
     "editable": true
    },
@@ -1569,7 +1569,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1ba933b4",
+   "id": "fe726ca0",
    "metadata": {
     "editable": true
    },
@@ -1580,7 +1580,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e3fd4aca",
+   "id": "48f71bad",
    "metadata": {
     "editable": true
    },
@@ -1591,7 +1591,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7de985c6",
+   "id": "737aa806",
    "metadata": {
     "editable": true
    },
@@ -1603,7 +1603,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "21aa9e62",
+   "id": "6670ac7c",
    "metadata": {
     "editable": true
    },
@@ -1613,7 +1613,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f2960691",
+   "id": "27d92a3f",
    "metadata": {
     "editable": true
    },
@@ -1625,7 +1625,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a2a817d0",
+   "id": "ae9a5d96",
    "metadata": {
     "editable": true
    },
@@ -1637,7 +1637,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "56b134fc",
+   "id": "9aa022a3",
    "metadata": {
     "editable": true
    },
@@ -1649,7 +1649,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f25fd824",
+   "id": "a5283643",
    "metadata": {
     "editable": true
    },
@@ -1661,7 +1661,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8e392ad7",
+   "id": "841a2814",
    "metadata": {
     "editable": true
    },
@@ -1672,7 +1672,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "60410134",
+   "id": "712dd44f",
    "metadata": {
     "editable": true
    },
@@ -1684,7 +1684,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4a1e9a92",
+   "id": "a8b8e47a",
    "metadata": {
     "editable": true
    },
@@ -1694,7 +1694,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "67f014be",
+   "id": "bb0d022b",
    "metadata": {
     "editable": true
    },
@@ -1706,7 +1706,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e3012221",
+   "id": "2dd6b830",
    "metadata": {
     "editable": true
    },
@@ -1716,7 +1716,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6f3e02d1",
+   "id": "4d2e50c5",
    "metadata": {
     "editable": true
    },
@@ -1728,7 +1728,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6de4cd93",
+   "id": "bffb4d24",
    "metadata": {
     "editable": true
    },
@@ -1748,7 +1748,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e3753aa3",
+   "id": "eb0a90ef",
    "metadata": {
     "editable": true
    },
@@ -1760,7 +1760,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "20c24704",
+   "id": "f1933be9",
    "metadata": {
     "editable": true
    },
@@ -1770,7 +1770,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "665d0cbc",
+   "id": "c485dce6",
    "metadata": {
     "editable": true
    },
@@ -1782,7 +1782,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "0ba96241",
+   "id": "0b047b67",
    "metadata": {
     "editable": true
    },
@@ -1792,7 +1792,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9c9384c4",
+   "id": "90a18fe4",
    "metadata": {
     "editable": true
    },
@@ -1803,7 +1803,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4fd53aab",
+   "id": "7403961b",
    "metadata": {
     "editable": true
    },
@@ -1815,7 +1815,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "81be821b",
+   "id": "45a4ed5a",
    "metadata": {
     "editable": true
    },
@@ -1827,7 +1827,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "870faed4",
+   "id": "43117fb3",
    "metadata": {
     "editable": true
    },
@@ -1839,7 +1839,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "06c1fbd7",
+   "id": "9b86e550",
    "metadata": {
     "editable": true
    },
@@ -1852,7 +1852,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e40662e2",
+   "id": "1e73a8a4",
    "metadata": {
     "editable": true
    },
@@ -1863,7 +1863,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9ac37b69",
+   "id": "4f079500",
    "metadata": {
     "editable": true
    },
@@ -1875,7 +1875,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ab3f4f4d",
+   "id": "a77b9760",
    "metadata": {
     "editable": true
    },
@@ -1891,7 +1891,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "45bdd82c",
+   "id": "b8ff988f",
    "metadata": {
     "editable": true
    },
@@ -1903,7 +1903,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "375b8393",
+   "id": "5d200121",
    "metadata": {
     "editable": true
    },
@@ -1914,7 +1914,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "bdfb2b67",
+   "id": "5a0be40f",
    "metadata": {
     "editable": true
    },
@@ -1926,7 +1926,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "5d8a99b8",
+   "id": "d2b03e84",
    "metadata": {
     "editable": true
    },
@@ -1936,7 +1936,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "2c8b910e",
+   "id": "26767458",
    "metadata": {
     "editable": true
    },
@@ -1948,7 +1948,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "98637d3f",
+   "id": "19a09298",
    "metadata": {
     "editable": true
    },
@@ -1958,7 +1958,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8e790583",
+   "id": "358fcc5f",
    "metadata": {
     "editable": true
    },
@@ -1970,7 +1970,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "3184f10e",
+   "id": "211e3885",
    "metadata": {
     "editable": true
    },
@@ -1980,7 +1980,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ad1e157c",
+   "id": "a3d918c2",
    "metadata": {
     "editable": true
    },
@@ -1992,7 +1992,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "0585a510",
+   "id": "1a8646c6",
    "metadata": {
     "editable": true
    },
@@ -2016,7 +2016,7 @@
   {
    "cell_type": "code",
    "execution_count": 9,
-   "id": "efd85ff7",
+   "id": "2a58fc5f",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2029,7 +2029,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ab0bb895",
+   "id": "f22f4c05",
    "metadata": {
     "editable": true
    },
@@ -2040,7 +2040,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "151d2ab3",
+   "id": "b359c45e",
    "metadata": {
     "editable": true
    },
@@ -2052,7 +2052,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ce6f641f",
+   "id": "26f78997",
    "metadata": {
     "editable": true
    },
@@ -2062,7 +2062,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f312159a",
+   "id": "fc72c351",
    "metadata": {
     "editable": true
    },
@@ -2074,7 +2074,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9142a989",
+   "id": "a22fd803",
    "metadata": {
     "editable": true
    },
@@ -2088,7 +2088,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "30647fcf",
+   "id": "a1c24abc",
    "metadata": {
     "editable": true
    },
@@ -2104,7 +2104,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f0b8898c",
+   "id": "879e4d0b",
    "metadata": {
     "editable": true
    },
@@ -2114,7 +2114,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d2b5491a",
+   "id": "cad58ece",
    "metadata": {
     "editable": true
    },
@@ -2126,7 +2126,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "3549657c",
+   "id": "3ea805f2",
    "metadata": {
     "editable": true
    },
@@ -2136,7 +2136,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4b563368",
+   "id": "192e4a07",
    "metadata": {
     "editable": true
    },
@@ -2148,7 +2148,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "3db6ffe7",
+   "id": "2ee9f4f7",
    "metadata": {
     "editable": true
    },
@@ -2162,7 +2162,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a763c64a",
+   "id": "ec667eee",
    "metadata": {
     "editable": true
    },
@@ -2172,7 +2172,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b3cec2a1",
+   "id": "93286445",
    "metadata": {
     "editable": true
    },
@@ -2183,7 +2183,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a643c771",
+   "id": "c26f841a",
    "metadata": {
     "editable": true
    },
@@ -2198,7 +2198,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7a1c7f17",
+   "id": "2adae630",
    "metadata": {
     "editable": true
    },
@@ -2208,7 +2208,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "62d49fee",
+   "id": "127611ba",
    "metadata": {
     "editable": true
    },
@@ -2220,7 +2220,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6fabbfed",
+   "id": "57db84ee",
    "metadata": {
     "editable": true
    },
@@ -2232,7 +2232,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7b2a1de4",
+   "id": "ab0d0e73",
    "metadata": {
     "editable": true
    },
@@ -2247,7 +2247,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "18f6c132",
+   "id": "9ae554c4",
    "metadata": {
     "editable": true
    },
@@ -2260,7 +2260,7 @@
   {
    "cell_type": "code",
    "execution_count": 10,
-   "id": "c699c22e",
+   "id": "607de431",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2317,7 +2317,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "444aaca9",
+   "id": "87f5cbc4",
    "metadata": {
     "editable": true
    },
@@ -2328,7 +2328,7 @@
   {
    "cell_type": "code",
    "execution_count": 11,
-   "id": "ac9ae637",
+   "id": "62f132db",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2355,7 +2355,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "941bc0a2",
+   "id": "1ace856e",
    "metadata": {
     "editable": true
    },
@@ -2367,7 +2367,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "810c462e",
+   "id": "0215f5b5",
    "metadata": {
     "editable": true
    },
@@ -2379,7 +2379,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a6df2629",
+   "id": "791f46e6",
    "metadata": {
     "editable": true
    },
@@ -2389,7 +2389,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "59360a65",
+   "id": "3b02080c",
    "metadata": {
     "editable": true
    },
@@ -2403,7 +2403,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "3851072d",
+   "id": "db7e17e4",
    "metadata": {
     "editable": true
    },
@@ -2413,7 +2413,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "bf46a88f",
+   "id": "2fdde7e6",
    "metadata": {
     "editable": true
    },
@@ -2425,7 +2425,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6816f9ac",
+   "id": "2217e27b",
    "metadata": {
     "editable": true
    },
@@ -2436,7 +2436,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8e89f8ef",
+   "id": "f3b99751",
    "metadata": {
     "editable": true
    },
@@ -2451,7 +2451,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "984e24d2",
+   "id": "82042b92",
    "metadata": {
     "editable": true
    },
@@ -2465,7 +2465,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "431068fb",
+   "id": "8ad6f60d",
    "metadata": {
     "editable": true
    },
@@ -2476,7 +2476,7 @@
   {
    "cell_type": "code",
    "execution_count": 12,
-   "id": "bbda900e",
+   "id": "2ba44646",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2504,7 +2504,7 @@
     "Id = n*lmbda* np.eye(XT_X.shape[0])\n",
     "\n",
     "# Hessian matrix\n",
-    "H = (2.0/n)* XT_X+2*lmbda\n",
+    "H = (2.0/n)* XT_X+2*lmbda* np.eye(XT_X.shape[0])\n",
     "# Get the eigenvalues\n",
     "EigValues, EigVectors = np.linalg.eig(H)\n",
     "print(f\"Eigenvalues of Hessian Matrix:{EigValues}\")\n",
@@ -2537,7 +2537,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "47df38a8",
+   "id": "39f26c17",
    "metadata": {
     "editable": true
    },
@@ -2559,7 +2559,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "70d28688",
+   "id": "1b7b916c",
    "metadata": {
     "editable": true
    },
@@ -2571,7 +2571,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "fea05624",
+   "id": "926acd76",
    "metadata": {
     "editable": true
    },
@@ -2581,7 +2581,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "80cdbba7",
+   "id": "2225fdb2",
    "metadata": {
     "editable": true
    },
@@ -2598,7 +2598,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f6c53b11",
+   "id": "b527275d",
    "metadata": {
     "editable": true
    },
@@ -2611,7 +2611,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e9b1294c",
+   "id": "54215210",
    "metadata": {
     "editable": true
    },
@@ -2624,7 +2624,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ba08d164",
+   "id": "faf3e2ae",
    "metadata": {
     "editable": true
    },
@@ -2637,7 +2637,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8821e1c6",
+   "id": "e80cc712",
    "metadata": {
     "editable": true
    },
@@ -2651,7 +2651,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e265ba33",
+   "id": "c8f41f8a",
    "metadata": {
     "editable": true
    },
@@ -2673,7 +2673,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "bca99177",
+   "id": "bc64a1b3",
    "metadata": {
     "editable": true
    },
@@ -2688,7 +2688,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a3092d2b",
+   "id": "370619e3",
    "metadata": {
     "editable": true
    },
@@ -2700,7 +2700,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b6b4b094",
+   "id": "39f84e51",
    "metadata": {
     "editable": true
    },
@@ -2713,7 +2713,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7a98c322",
+   "id": "8badbdbb",
    "metadata": {
     "editable": true
    },
@@ -2727,7 +2727,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4db7c7ec",
+   "id": "fb189ee6",
    "metadata": {
     "editable": true
    },
@@ -2738,7 +2738,7 @@
   {
    "cell_type": "code",
    "execution_count": 13,
-   "id": "a2b36bb2",
+   "id": "1b10dd63",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2763,7 +2763,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "db5b47ef",
+   "id": "60c85a6a",
    "metadata": {
     "editable": true
    },
@@ -2779,7 +2779,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "3bd989b7",
+   "id": "03056842",
    "metadata": {
     "editable": true
    },
@@ -2800,7 +2800,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "24704b66",
+   "id": "d0fc69b6",
    "metadata": {
     "editable": true
    },
@@ -2823,7 +2823,7 @@
   {
    "cell_type": "code",
    "execution_count": 14,
-   "id": "dd7fa581",
+   "id": "477f8067",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2858,7 +2858,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "82cff81c",
+   "id": "b2df0f6e",
    "metadata": {
     "editable": true
    },
@@ -2869,7 +2869,7 @@
   {
    "cell_type": "code",
    "execution_count": 15,
-   "id": "5b1260aa",
+   "id": "e6e21347",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2945,7 +2945,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "233c78fb",
+   "id": "74cb0f5b",
    "metadata": {
     "editable": true
    },
@@ -2955,7 +2955,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b2fd93ed",
+   "id": "263a062f",
    "metadata": {
     "editable": true
    },
@@ -2970,7 +2970,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "199caa31",
+   "id": "5acea3b6",
    "metadata": {
     "editable": true
    },
@@ -2982,7 +2982,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "41c76af5",
+   "id": "86b6ce74",
    "metadata": {
     "editable": true
    },
@@ -3000,7 +3000,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c78a32c6",
+   "id": "6ba3933e",
    "metadata": {
     "editable": true
    },
@@ -3019,7 +3019,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a7408104",
+   "id": "a6f7b01b",
    "metadata": {
     "editable": true
    },
@@ -3031,7 +3031,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e4dbbaf5",
+   "id": "66265044",
    "metadata": {
     "editable": true
    },
@@ -3041,7 +3041,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9d0c3d51",
+   "id": "c0c27f64",
    "metadata": {
     "editable": true
    },
@@ -3057,7 +3057,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "531a93b7",
+   "id": "b56e7234",
    "metadata": {
     "editable": true
    },
@@ -3069,7 +3069,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "00119714",
+   "id": "ea8ea658",
    "metadata": {
     "editable": true
    },
@@ -3079,7 +3079,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "3c08b7fe",
+   "id": "e4f1b7ba",
    "metadata": {
     "editable": true
    },
@@ -3091,7 +3091,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "dcb56a9b",
+   "id": "3dca8de6",
    "metadata": {
     "editable": true
    },
@@ -3101,7 +3101,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ce5865f1",
+   "id": "b4eed9ca",
    "metadata": {
     "editable": true
    },
@@ -3113,7 +3113,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c2602c26",
+   "id": "1d004801",
    "metadata": {
     "editable": true
    },
@@ -3129,7 +3129,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b5519380",
+   "id": "ebad5b4c",
    "metadata": {
     "editable": true
    },
@@ -3141,7 +3141,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "79641542",
+   "id": "78e2425d",
    "metadata": {
     "editable": true
    },
@@ -3174,7 +3174,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "08b0c266",
+   "id": "d7528c9c",
    "metadata": {
     "editable": true
    },
@@ -3186,7 +3186,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ee233c3a",
+   "id": "92f6d9ee",
    "metadata": {
     "editable": true
    },
@@ -3204,7 +3204,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a0b332cd",
+   "id": "b3a14edc",
    "metadata": {
     "editable": true
    },
@@ -3214,7 +3214,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ff5708eb",
+   "id": "1b49bdef",
    "metadata": {
     "editable": true
    },
@@ -3245,7 +3245,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6d462166",
+   "id": "602dd2c7",
    "metadata": {
     "editable": true
    },
@@ -3260,7 +3260,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b6034fe7",
+   "id": "2da5dfb7",
    "metadata": {
     "editable": true
    },
@@ -3278,7 +3278,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "eb0c3e0c",
+   "id": "ebf4a63b",
    "metadata": {
     "editable": true
    },
@@ -3290,7 +3290,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "acaa4805",
+   "id": "78f4edbe",
    "metadata": {
     "editable": true
    },
@@ -3302,7 +3302,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4a31a273",
+   "id": "bdc9f8d2",
    "metadata": {
     "editable": true
    },
@@ -3320,7 +3320,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "5eb002b0",
+   "id": "00095259",
    "metadata": {
     "editable": true
    },
@@ -3343,7 +3343,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "3f7b4c3a",
+   "id": "4611ffb2",
    "metadata": {
     "editable": true
    },
@@ -3361,7 +3361,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "5ed8c41e",
+   "id": "096b4a4c",
    "metadata": {
     "editable": true
    },
@@ -3373,7 +3373,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b1ea2b88",
+   "id": "fcb52b2e",
    "metadata": {
     "editable": true
    },
@@ -3385,7 +3385,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d9c07193",
+   "id": "6997acaf",
    "metadata": {
     "editable": true
    },
@@ -3397,7 +3397,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "35c46884",
+   "id": "d4f09801",
    "metadata": {
     "editable": true
    },
@@ -3409,7 +3409,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "76429fe8",
+   "id": "49d19dec",
    "metadata": {
     "editable": true
    },
@@ -3421,7 +3421,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8de9249f",
+   "id": "0d72a20c",
    "metadata": {
     "editable": true
    },
@@ -3438,7 +3438,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "940a5d91",
+   "id": "1e7dd68d",
    "metadata": {
     "editable": true
    },
@@ -3457,7 +3457,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c6205b89",
+   "id": "f44bae92",
    "metadata": {
     "editable": true
    },
@@ -3469,7 +3469,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "65810115",
+   "id": "c101ad6a",
    "metadata": {
     "editable": true
    },
@@ -3489,7 +3489,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6bc3cf1d",
+   "id": "2d4a7bad",
    "metadata": {
     "editable": true
    },
@@ -3527,7 +3527,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "43d0a20a",
+   "id": "1debafa2",
    "metadata": {
     "editable": true
    },
@@ -3539,7 +3539,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "0953d1bc",
+   "id": "2df83f23",
    "metadata": {
     "editable": true
    },
@@ -3549,7 +3549,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7592ff35",
+   "id": "cbdc7d40",
    "metadata": {
     "editable": true
    },
@@ -3561,7 +3561,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d15370e5",
+   "id": "90c43fe1",
    "metadata": {
     "editable": true
    },
@@ -3572,7 +3572,7 @@
   {
    "cell_type": "code",
    "execution_count": 16,
-   "id": "8f5913e1",
+   "id": "d3f3c169",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3617,7 +3617,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "71c39e32",
+   "id": "aaeb2f07",
    "metadata": {
     "editable": true
    },
@@ -3634,7 +3634,7 @@
   {
    "cell_type": "code",
    "execution_count": 17,
-   "id": "1efcd9fa",
+   "id": "8b54b011",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3662,7 +3662,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ab0908c5",
+   "id": "a7d5c4a3",
    "metadata": {
     "editable": true
    },
@@ -3677,7 +3677,7 @@
   {
    "cell_type": "code",
    "execution_count": 18,
-   "id": "a72cc755",
+   "id": "808d7257",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3721,7 +3721,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "79758552",
+   "id": "fcccacac",
    "metadata": {
     "editable": true
    },
@@ -3731,7 +3731,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "748926f8",
+   "id": "07743bce",
    "metadata": {
     "editable": true
    },
@@ -3742,7 +3742,7 @@
   {
    "cell_type": "code",
    "execution_count": 19,
-   "id": "e3a7c232",
+   "id": "462e5079",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3770,7 +3770,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f74b1eb5",
+   "id": "f6f582e9",
    "metadata": {
     "editable": true
    },
@@ -3785,7 +3785,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6d331ee9",
+   "id": "fa8cd98d",
    "metadata": {
     "editable": true
    },
@@ -3796,7 +3796,7 @@
   {
    "cell_type": "code",
    "execution_count": 20,
-   "id": "491edb7b",
+   "id": "af9291a2",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3824,7 +3824,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "3a02231c",
+   "id": "c71170a0",
    "metadata": {
     "editable": true
    },
@@ -3835,7 +3835,7 @@
   {
    "cell_type": "code",
    "execution_count": 21,
-   "id": "f9503d9c",
+   "id": "70d22cd2",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3860,7 +3860,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "06bc0ed4",
+   "id": "49cff9c1",
    "metadata": {
     "editable": true
    },
@@ -3871,7 +3871,7 @@
   {
    "cell_type": "code",
    "execution_count": 22,
-   "id": "c979c105",
+   "id": "9bf07b91",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3907,7 +3907,7 @@
   {
    "cell_type": "code",
    "execution_count": 23,
-   "id": "b8a170e6",
+   "id": "1433de4f",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3927,7 +3927,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b5e0d5ef",
+   "id": "739542d5",
    "metadata": {
     "editable": true
    },
@@ -3938,7 +3938,7 @@
   {
    "cell_type": "code",
    "execution_count": 24,
-   "id": "f7a31b7c",
+   "id": "71b47968",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3976,7 +3976,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6952ed41",
+   "id": "90cd56de",
    "metadata": {
     "editable": true
    },
@@ -3986,7 +3986,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "31f37182",
+   "id": "412f2188",
    "metadata": {
     "editable": true
    },
@@ -4000,7 +4000,7 @@
   {
    "cell_type": "code",
    "execution_count": 25,
-   "id": "0f2ae76f",
+   "id": "9278db34",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -4022,7 +4022,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d747acf6",
+   "id": "b1c799c9",
    "metadata": {
     "editable": true
    },
@@ -4032,7 +4032,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "aed533c7",
+   "id": "9250081e",
    "metadata": {
     "editable": true
    },
@@ -4043,7 +4043,7 @@
   {
    "cell_type": "code",
    "execution_count": 26,
-   "id": "374f022a",
+   "id": "5f5ec5e4",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -4065,7 +4065,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1e3c8997",
+   "id": "9b08f5cb",
    "metadata": {
     "editable": true
    },
@@ -4078,7 +4078,7 @@
   {
    "cell_type": "code",
    "execution_count": 27,
-   "id": "25c470ee",
+   "id": "258048ca",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -4103,7 +4103,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "20cc39d9",
+   "id": "abebc622",
    "metadata": {
     "editable": true
    },
@@ -4115,7 +4115,7 @@
   {
    "cell_type": "code",
    "execution_count": 28,
-   "id": "7604b990",
+   "id": "50463160",
    "metadata": {
     "collapsed": false,
     "editable": true
diff --git a/doc/src/week39/week39.do.txt b/doc/src/week39/week39.do.txt
index 222ebbb23..5ccc0dfde 100644
--- a/doc/src/week39/week39.do.txt
+++ b/doc/src/week39/week39.do.txt
@@ -1206,7 +1206,7 @@ lmbda  = 0.001
 Id = n*lmbda* np.eye(XT_X.shape[0])
 
 # Hessian matrix
-H = (2.0/n)* XT_X+2*lmbda
+H = (2.0/n)* XT_X+2*lmbda* np.eye(XT_X.shape[0])
 # Get the eigenvalues
 EigValues, EigVectors = np.linalg.eig(H)
 print(f"Eigenvalues of Hessian Matrix:{EigValues}")