diff --git a/doc/pub/week39/html/week39-bs.html b/doc/pub/week39/html/week39-bs.html
index 405fb5dde..9981773ad 100644
--- a/doc/pub/week39/html/week39-bs.html
+++ b/doc/pub/week39/html/week39-bs.html
@@ -248,10 +248,10 @@ doconce format html week39.do.txt --html_style=bootstrap --pygments_html_style=d
                2,
                None,
                'same-code-but-now-with-momentum-gradient-descent'),
-              ("But noen of these can compete with Newton's method",
+              ("But none of these can compete with Newton's method",
                2,
                None,
-               'but-noen-of-these-can-compete-with-newton-s-method'),
+               'but-none-of-these-can-compete-with-newton-s-method'),
               ('Including Stochastic Gradient Descent with Autograd',
                2,
                None,
@@ -394,7 +394,7 @@ MathJax.Hub.Config({
      <!-- navigation toc: --> <li><a href="._week39-bs079.html#recommended-to-avoid" style="font-size: 80%;">Recommended to avoid</a></li>
      <!-- navigation toc: --> <li><a href="._week39-bs080.html#using-autograd-with-ols" style="font-size: 80%;">Using Autograd with OLS</a></li>
      <!-- navigation toc: --> <li><a href="._week39-bs084.html#same-code-but-now-with-momentum-gradient-descent" style="font-size: 80%;">Same code but now with momentum gradient descent</a></li>
-     <!-- navigation toc: --> <li><a href="._week39-bs082.html#but-noen-of-these-can-compete-with-newton-s-method" style="font-size: 80%;">But noen of these can compete with Newton's method</a></li>
+     <!-- navigation toc: --> <li><a href="._week39-bs082.html#but-none-of-these-can-compete-with-newton-s-method" style="font-size: 80%;">But none of these can compete with Newton's method</a></li>
      <!-- navigation toc: --> <li><a href="._week39-bs083.html#including-stochastic-gradient-descent-with-autograd" style="font-size: 80%;">Including Stochastic Gradient Descent with Autograd</a></li>
      <!-- navigation toc: --> <li><a href="._week39-bs084.html#same-code-but-now-with-momentum-gradient-descent" style="font-size: 80%;">Same code but now with momentum gradient descent</a></li>
      <!-- navigation toc: --> <li><a href="._week39-bs085.html#similar-second-order-function-now-problem-but-now-with-adagrad" style="font-size: 80%;">Similar (second order function now) problem but now with AdaGrad</a></li>
diff --git a/doc/pub/week39/html/week39-reveal.html b/doc/pub/week39/html/week39-reveal.html
index e5d488e8f..ca38d7215 100644
--- a/doc/pub/week39/html/week39-reveal.html
+++ b/doc/pub/week39/html/week39-reveal.html
@@ -3294,7 +3294,7 @@ delta_momentum = <span style="color: #B452CD">0.3</span>
 </section>
 
 <section>
-<h2 id="but-noen-of-these-can-compete-with-newton-s-method">But noen of these can compete with Newton's method </h2>
+<h2 id="but-none-of-these-can-compete-with-newton-s-method">But none of these can compete with Newton's method </h2>
 
 
 <!-- code=python (!bc pycod) typeset with pygments style "perldoc" -->
diff --git a/doc/pub/week39/html/week39-solarized.html b/doc/pub/week39/html/week39-solarized.html
index 40df3a265..4d70cff9a 100644
--- a/doc/pub/week39/html/week39-solarized.html
+++ b/doc/pub/week39/html/week39-solarized.html
@@ -275,10 +275,10 @@ div.toc p,a {
                2,
                None,
                'same-code-but-now-with-momentum-gradient-descent'),
-              ("But noen of these can compete with Newton's method",
+              ("But none of these can compete with Newton's method",
                2,
                None,
-               'but-noen-of-these-can-compete-with-newton-s-method'),
+               'but-none-of-these-can-compete-with-newton-s-method'),
               ('Including Stochastic Gradient Descent with Autograd',
                2,
                None,
@@ -3232,7 +3232,7 @@ delta_momentum = <span style="color: #B452CD">0.3</span>
 
 
 <!-- !split --><br><br><br><br><br><br><br><br><br><br>
-<h2 id="but-noen-of-these-can-compete-with-newton-s-method">But noen of these can compete with Newton's method </h2>
+<h2 id="but-none-of-these-can-compete-with-newton-s-method">But none of these can compete with Newton's method </h2>
 
 
 <!-- code=python (!bc pycod) typeset with pygments style "perldoc" -->
diff --git a/doc/pub/week39/html/week39.html b/doc/pub/week39/html/week39.html
index b58c4d8be..a7d3b6548 100644
--- a/doc/pub/week39/html/week39.html
+++ b/doc/pub/week39/html/week39.html
@@ -352,10 +352,10 @@ div.toc p,a {
                2,
                None,
                'same-code-but-now-with-momentum-gradient-descent'),
-              ("But noen of these can compete with Newton's method",
+              ("But none of these can compete with Newton's method",
                2,
                None,
-               'but-noen-of-these-can-compete-with-newton-s-method'),
+               'but-none-of-these-can-compete-with-newton-s-method'),
               ('Including Stochastic Gradient Descent with Autograd',
                2,
                None,
@@ -3309,7 +3309,7 @@ delta_momentum <span style="color: #666666">=</span> <span style="color: #666666
 
 
 <!-- !split --><br><br><br><br><br><br><br><br><br><br>
-<h2 id="but-noen-of-these-can-compete-with-newton-s-method">But noen of these can compete with Newton's method </h2>
+<h2 id="but-none-of-these-can-compete-with-newton-s-method">But none of these can compete with Newton's method </h2>
 
 
 <!-- code=python (!bc pycod) typeset with pygments style "default" -->
diff --git a/doc/pub/week39/ipynb/ipynb-week39-src.tar.gz b/doc/pub/week39/ipynb/ipynb-week39-src.tar.gz
index 9c6e9a4d6..9c04348bd 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 874690134..67fc84a98 100644
--- a/doc/pub/week39/ipynb/week39.ipynb
+++ b/doc/pub/week39/ipynb/week39.ipynb
@@ -2,7 +2,7 @@
  "cells": [
   {
    "cell_type": "markdown",
-   "id": "a777059d",
+   "id": "c5ed1290",
    "metadata": {
     "editable": true
    },
@@ -14,7 +14,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "46de5112",
+   "id": "3bbe62df",
    "metadata": {
     "editable": true
    },
@@ -27,7 +27,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d1a193dd",
+   "id": "6954aa21",
    "metadata": {
     "editable": true
    },
@@ -37,7 +37,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9b00826d",
+   "id": "01c27e5f",
    "metadata": {
     "editable": true
    },
@@ -67,7 +67,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "31cff1ed",
+   "id": "680e1119",
    "metadata": {
     "editable": true
    },
@@ -94,7 +94,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e5b080b4",
+   "id": "429cd901",
    "metadata": {
     "editable": true
    },
@@ -115,7 +115,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7961520d",
+   "id": "df5685f9",
    "metadata": {
     "editable": true
    },
@@ -132,7 +132,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "271b3e55",
+   "id": "6c2039ef",
    "metadata": {
     "editable": true
    },
@@ -147,7 +147,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b95e7beb",
+   "id": "044383ac",
    "metadata": {
     "editable": true
    },
@@ -157,7 +157,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "2f95cd51",
+   "id": "87926d76",
    "metadata": {
     "editable": true
    },
@@ -173,7 +173,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6808dbc0",
+   "id": "1630039f",
    "metadata": {
     "editable": true
    },
@@ -185,7 +185,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "3587718c",
+   "id": "fce41128",
    "metadata": {
     "editable": true
    },
@@ -196,7 +196,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "fdd1ac66",
+   "id": "db3f46ef",
    "metadata": {
     "editable": true
    },
@@ -208,7 +208,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6730fa45",
+   "id": "d05262f0",
    "metadata": {
     "editable": true
    },
@@ -218,7 +218,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9cec7a4a",
+   "id": "3cb8e68c",
    "metadata": {
     "editable": true
    },
@@ -232,7 +232,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "10943d88",
+   "id": "b417cfde",
    "metadata": {
     "editable": true
    },
@@ -244,7 +244,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7a13c3ad",
+   "id": "da2701fa",
    "metadata": {
     "editable": true
    },
@@ -254,7 +254,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "2ac20e20",
+   "id": "3069844d",
    "metadata": {
     "editable": true
    },
@@ -266,7 +266,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "64b91f34",
+   "id": "e9a6b151",
    "metadata": {
     "editable": true
    },
@@ -278,7 +278,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4140ce15",
+   "id": "1d27234c",
    "metadata": {
     "editable": true
    },
@@ -298,7 +298,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "0fbbfbd1",
+   "id": "b8489211",
    "metadata": {
     "editable": true
    },
@@ -314,7 +314,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "84503a94",
+   "id": "a6409d18",
    "metadata": {
     "editable": true
    },
@@ -330,7 +330,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b7747b50",
+   "id": "4c79a0f3",
    "metadata": {
     "editable": true
    },
@@ -341,7 +341,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "fabc0335",
+   "id": "9bb173f4",
    "metadata": {
     "editable": true
    },
@@ -353,7 +353,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "53f11b98",
+   "id": "3f920027",
    "metadata": {
     "editable": true
    },
@@ -363,7 +363,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "2eb35f3b",
+   "id": "3fc079ac",
    "metadata": {
     "editable": true
    },
@@ -375,7 +375,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "efec77fc",
+   "id": "d202b139",
    "metadata": {
     "editable": true
    },
@@ -385,7 +385,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "21126b1b",
+   "id": "88f82fa8",
    "metadata": {
     "editable": true
    },
@@ -397,7 +397,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "fdc972f4",
+   "id": "b050a2e8",
    "metadata": {
     "editable": true
    },
@@ -419,7 +419,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ea541470",
+   "id": "a8c7b5fc",
    "metadata": {
     "editable": true
    },
@@ -432,7 +432,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8aab454c",
+   "id": "2329b48a",
    "metadata": {
     "editable": true
    },
@@ -445,7 +445,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "dddbac54",
+   "id": "089d0cf0",
    "metadata": {
     "editable": true
    },
@@ -455,7 +455,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "dbd9d9f5",
+   "id": "63bd31f8",
    "metadata": {
     "editable": true
    },
@@ -473,7 +473,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1c0a9093",
+   "id": "e2698e05",
    "metadata": {
     "editable": true
    },
@@ -483,7 +483,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7605435e",
+   "id": "1b9f3d5a",
    "metadata": {
     "editable": true
    },
@@ -498,7 +498,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "55378b51",
+   "id": "15b9284f",
    "metadata": {
     "editable": true
    },
@@ -508,7 +508,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a561f6fe",
+   "id": "e5c200e0",
    "metadata": {
     "editable": true
    },
@@ -522,7 +522,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c72184c0",
+   "id": "673b4125",
    "metadata": {
     "editable": true
    },
@@ -532,7 +532,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1bd1036d",
+   "id": "906f1ebe",
    "metadata": {
     "editable": true
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@@ -546,7 +546,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "507767b7",
+   "id": "f72a16cf",
    "metadata": {
     "editable": true
    },
@@ -561,7 +561,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "910e542b",
+   "id": "3269eac7",
    "metadata": {
     "editable": true
    },
@@ -578,7 +578,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f58db334",
+   "id": "136f7b2b",
    "metadata": {
     "editable": true
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@@ -590,7 +590,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a0d4a17a",
+   "id": "bba1b46d",
    "metadata": {
     "editable": true
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@@ -604,7 +604,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ec6c63eb",
+   "id": "e834b93b",
    "metadata": {
     "editable": true
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@@ -619,7 +619,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c7a3d764",
+   "id": "d701921d",
    "metadata": {
     "editable": true
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@@ -631,7 +631,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7e0fc177",
+   "id": "3fe0af3e",
    "metadata": {
     "editable": true
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@@ -642,7 +642,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "22bdeee8",
+   "id": "4a3afa58",
    "metadata": {
     "editable": true
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@@ -670,7 +670,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "42e70771",
+   "id": "1d0e16c3",
    "metadata": {
     "editable": true
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@@ -692,7 +692,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1feefc33",
+   "id": "b4d52eb1",
    "metadata": {
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@@ -714,7 +714,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7bab34f0",
+   "id": "392eab76",
    "metadata": {
     "editable": true
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@@ -735,7 +735,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d343afa6",
+   "id": "52ae025f",
    "metadata": {
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@@ -774,7 +774,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "5443319d",
+   "id": "35ef9979",
    "metadata": {
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@@ -802,7 +802,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "80986952",
+   "id": "12f85f06",
    "metadata": {
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@@ -832,7 +832,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c07bbe7c",
+   "id": "21657f4c",
    "metadata": {
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@@ -852,7 +852,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "bcbd1b3b",
+   "id": "1777890c",
    "metadata": {
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@@ -864,7 +864,7 @@
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   {
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-   "id": "1f185d0d",
+   "id": "a599468a",
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@@ -874,7 +874,7 @@
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   {
    "cell_type": "markdown",
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+   "id": "86d30b9d",
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@@ -886,7 +886,7 @@
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   {
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-   "id": "ac8a468b",
+   "id": "a412cc9f",
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@@ -898,7 +898,7 @@
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   {
    "cell_type": "markdown",
-   "id": "2b84de67",
+   "id": "bcc88151",
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@@ -910,7 +910,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a3c957bf",
+   "id": "e0e3c9c4",
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@@ -922,7 +922,7 @@
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   {
    "cell_type": "markdown",
-   "id": "25fa3a34",
+   "id": "d80700eb",
    "metadata": {
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@@ -933,7 +933,7 @@
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   {
    "cell_type": "markdown",
-   "id": "e62898a8",
+   "id": "f6299c25",
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@@ -946,7 +946,7 @@
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   {
    "cell_type": "markdown",
-   "id": "d9ddaae6",
+   "id": "8c527686",
    "metadata": {
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@@ -958,7 +958,7 @@
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-   "id": "6631af76",
+   "id": "24a54f69",
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@@ -968,7 +968,7 @@
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   {
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-   "id": "3e6fc2e7",
+   "id": "639663d9",
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@@ -980,7 +980,7 @@
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-   "id": "cb06c395",
+   "id": "d59ebf9a",
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@@ -990,7 +990,7 @@
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   {
    "cell_type": "markdown",
-   "id": "a9142100",
+   "id": "35508014",
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@@ -1001,7 +1001,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7b2840aa",
+   "id": "ae903221",
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@@ -1013,7 +1013,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e6841448",
+   "id": "0275c881",
    "metadata": {
     "editable": true
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@@ -1025,7 +1025,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1853852f",
+   "id": "238a3ad4",
    "metadata": {
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@@ -1037,7 +1037,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ffc5e08b",
+   "id": "7fd8a3c5",
    "metadata": {
     "editable": true
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@@ -1048,7 +1048,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6831a3e3",
+   "id": "d6685a95",
    "metadata": {
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@@ -1059,7 +1059,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8f68f769",
+   "id": "0f53b358",
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@@ -1071,7 +1071,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9d2f72a1",
+   "id": "b5c24a07",
    "metadata": {
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@@ -1081,7 +1081,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b8413510",
+   "id": "582ceee5",
    "metadata": {
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@@ -1093,7 +1093,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "0f4bfbf7",
+   "id": "6dead221",
    "metadata": {
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@@ -1103,7 +1103,7 @@
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@@ -1115,7 +1115,7 @@
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@@ -1125,7 +1125,7 @@
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@@ -1137,7 +1137,7 @@
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@@ -1147,7 +1147,7 @@
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@@ -1159,7 +1159,7 @@
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@@ -1170,7 +1170,7 @@
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@@ -1203,7 +1203,7 @@
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@@ -1214,7 +1214,7 @@
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@@ -1228,7 +1228,7 @@
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@@ -1239,7 +1239,7 @@
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@@ -1252,7 +1252,7 @@
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@@ -1263,7 +1263,7 @@
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@@ -1281,7 +1281,7 @@
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@@ -1292,7 +1292,7 @@
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@@ -1307,7 +1307,7 @@
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@@ -1317,7 +1317,7 @@
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@@ -1331,7 +1331,7 @@
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@@ -1343,7 +1343,7 @@
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@@ -1354,7 +1354,7 @@
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@@ -1366,7 +1366,7 @@
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@@ -1377,7 +1377,7 @@
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@@ -1388,7 +1388,7 @@
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@@ -1400,7 +1400,7 @@
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@@ -1410,7 +1410,7 @@
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@@ -1422,7 +1422,7 @@
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@@ -1434,7 +1434,7 @@
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@@ -1446,7 +1446,7 @@
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@@ -1458,7 +1458,7 @@
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@@ -1469,7 +1469,7 @@
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@@ -1481,7 +1481,7 @@
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@@ -1491,7 +1491,7 @@
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@@ -1503,7 +1503,7 @@
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@@ -1513,7 +1513,7 @@
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@@ -1525,7 +1525,7 @@
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@@ -1545,7 +1545,7 @@
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@@ -1557,7 +1557,7 @@
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@@ -1567,7 +1567,7 @@
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@@ -1579,7 +1579,7 @@
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@@ -1589,7 +1589,7 @@
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@@ -1600,7 +1600,7 @@
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@@ -1612,7 +1612,7 @@
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@@ -1624,7 +1624,7 @@
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@@ -1636,7 +1636,7 @@
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@@ -1649,7 +1649,7 @@
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@@ -1660,7 +1660,7 @@
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@@ -1672,7 +1672,7 @@
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@@ -1688,7 +1688,7 @@
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@@ -1700,7 +1700,7 @@
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@@ -1711,7 +1711,7 @@
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@@ -1723,7 +1723,7 @@
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@@ -1733,7 +1733,7 @@
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@@ -1745,7 +1745,7 @@
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@@ -1755,7 +1755,7 @@
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@@ -1767,7 +1767,7 @@
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@@ -1777,7 +1777,7 @@
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@@ -1789,7 +1789,7 @@
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@@ -1813,7 +1813,7 @@
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@@ -1826,7 +1826,7 @@
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@@ -1837,7 +1837,7 @@
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@@ -1849,7 +1849,7 @@
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@@ -1859,7 +1859,7 @@
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@@ -1871,7 +1871,7 @@
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@@ -1885,7 +1885,7 @@
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@@ -1901,7 +1901,7 @@
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@@ -1911,7 +1911,7 @@
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@@ -1923,7 +1923,7 @@
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@@ -1933,7 +1933,7 @@
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@@ -1945,7 +1945,7 @@
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@@ -1959,7 +1959,7 @@
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@@ -1969,7 +1969,7 @@
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@@ -1980,7 +1980,7 @@
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+   "id": "d0cf5d0a",
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@@ -1995,7 +1995,7 @@
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@@ -2005,7 +2005,7 @@
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@@ -2017,7 +2017,7 @@
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@@ -2029,7 +2029,7 @@
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@@ -2044,7 +2044,7 @@
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@@ -2057,7 +2057,7 @@
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-   "id": "9cdfde32",
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@@ -2114,7 +2114,7 @@
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@@ -2125,7 +2125,7 @@
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-   "id": "c74ff08d",
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@@ -2152,7 +2152,7 @@
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@@ -2164,7 +2164,7 @@
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@@ -2176,7 +2176,7 @@
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@@ -2186,7 +2186,7 @@
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@@ -2200,7 +2200,7 @@
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@@ -2210,7 +2210,7 @@
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@@ -2222,7 +2222,7 @@
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@@ -2233,7 +2233,7 @@
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@@ -2248,7 +2248,7 @@
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@@ -2262,7 +2262,7 @@
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@@ -2273,7 +2273,7 @@
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-   "id": "bf1b1feb",
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@@ -2334,7 +2334,7 @@
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@@ -2356,7 +2356,7 @@
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@@ -2369,7 +2369,7 @@
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@@ -2435,7 +2435,7 @@
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@@ -2446,7 +2446,7 @@
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@@ -2520,7 +2520,7 @@
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@@ -2532,7 +2532,7 @@
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@@ -2553,7 +2553,7 @@
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@@ -2585,7 +2585,7 @@
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@@ -2602,7 +2602,7 @@
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@@ -2615,7 +2615,7 @@
   },
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+   "id": "67dcc1a6",
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@@ -2628,7 +2628,7 @@
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@@ -2641,7 +2641,7 @@
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@@ -2655,7 +2655,7 @@
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@@ -2677,7 +2677,7 @@
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@@ -2692,7 +2692,7 @@
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@@ -2704,7 +2704,7 @@
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+   "id": "752c0927",
    "metadata": {
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@@ -2717,7 +2717,7 @@
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@@ -2731,7 +2731,7 @@
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@@ -2742,7 +2742,7 @@
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-   "id": "3c9054a5",
+   "id": "7ab4ec2c",
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     "editable": true
@@ -2767,7 +2767,7 @@
   },
   {
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+   "id": "405939cd",
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@@ -2783,7 +2783,7 @@
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@@ -2804,7 +2804,7 @@
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+   "id": "3bae11ff",
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@@ -2824,7 +2824,7 @@
   },
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@@ -2843,7 +2843,7 @@
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-   "id": "ec29759e",
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@@ -2878,7 +2878,7 @@
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@@ -2891,7 +2891,7 @@
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@@ -2968,7 +2968,7 @@
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@@ -2983,7 +2983,7 @@
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@@ -2998,7 +2998,7 @@
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+   "id": "6cfea458",
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@@ -3010,7 +3010,7 @@
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@@ -3028,7 +3028,7 @@
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@@ -3047,7 +3047,7 @@
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@@ -3059,7 +3059,7 @@
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@@ -3069,7 +3069,7 @@
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@@ -3085,7 +3085,7 @@
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@@ -3097,7 +3097,7 @@
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@@ -3107,7 +3107,7 @@
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@@ -3119,7 +3119,7 @@
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@@ -3129,7 +3129,7 @@
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@@ -3141,7 +3141,7 @@
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@@ -3157,7 +3157,7 @@
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@@ -3169,7 +3169,7 @@
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   {
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+   "id": "65ef8ec4",
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     "editable": true
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@@ -3202,7 +3202,7 @@
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   {
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+   "id": "66339906",
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@@ -3214,7 +3214,7 @@
   },
   {
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+   "id": "97ec17b4",
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@@ -3232,7 +3232,7 @@
   },
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+   "id": "00de4c4e",
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@@ -3242,7 +3242,7 @@
   },
   {
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-   "id": "d380ec40",
+   "id": "3541e14f",
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@@ -3273,7 +3273,7 @@
   },
   {
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+   "id": "e2e5310f",
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@@ -3288,7 +3288,7 @@
   },
   {
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-   "id": "63d19143",
+   "id": "9adf12bd",
    "metadata": {
     "editable": true
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@@ -3306,7 +3306,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d98c81db",
+   "id": "c7fdbda0",
    "metadata": {
     "editable": true
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@@ -3318,7 +3318,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "beae0c8a",
+   "id": "e17b5428",
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@@ -3330,7 +3330,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "55a97868",
+   "id": "6867fc04",
    "metadata": {
     "editable": true
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@@ -3348,7 +3348,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a74d2f3b",
+   "id": "bd1b1aff",
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@@ -3377,7 +3377,7 @@
   },
   {
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-   "id": "e5820d99",
+   "id": "96f7345e",
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     "editable": true
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@@ -3395,7 +3395,7 @@
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@@ -3407,7 +3407,7 @@
   },
   {
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-   "id": "e7f5e38e",
+   "id": "b92508d0",
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@@ -3419,7 +3419,7 @@
   },
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+   "id": "c65a31e7",
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@@ -3431,7 +3431,7 @@
   },
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+   "id": "99d890db",
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@@ -3443,7 +3443,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7b1ef2f8",
+   "id": "d7840ce3",
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@@ -3455,7 +3455,7 @@
   },
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-   "id": "25ba60c9",
+   "id": "e37cd51e",
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@@ -3472,7 +3472,7 @@
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@@ -3491,7 +3491,7 @@
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-   "id": "cb57b4a2",
+   "id": "824861e7",
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@@ -3503,7 +3503,7 @@
   },
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-   "id": "2adebd08",
+   "id": "cd09009c",
    "metadata": {
     "editable": true
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@@ -3517,7 +3517,7 @@
   },
   {
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-   "id": "c690d64a",
+   "id": "27e90e4f",
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@@ -3537,7 +3537,7 @@
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   {
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+   "id": "23cd1c45",
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     "editable": true
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@@ -3575,7 +3575,7 @@
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+   "id": "55e55478",
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     "editable": true
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@@ -3587,7 +3587,7 @@
   },
   {
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-   "id": "c05c0a08",
+   "id": "96f37611",
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@@ -3597,7 +3597,7 @@
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@@ -3609,7 +3609,7 @@
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+   "id": "06039a09",
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@@ -3620,7 +3620,7 @@
   {
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    "execution_count": 15,
-   "id": "c695161c",
+   "id": "d4263283",
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     "editable": true
@@ -3665,7 +3665,7 @@
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-   "id": "eeedeb5b",
+   "id": "4df3634a",
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@@ -3682,7 +3682,7 @@
   {
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-   "id": "7d5d5df5",
+   "id": "fbc1e41a",
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     "editable": true
@@ -3710,7 +3710,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "afa341a9",
+   "id": "9c08cde3",
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@@ -3725,7 +3725,7 @@
   {
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-   "id": "11d932d0",
+   "id": "ece9dcc5",
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@@ -3769,7 +3769,7 @@
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+   "id": "72904bdb",
    "metadata": {
     "editable": true
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@@ -3779,7 +3779,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c733952c",
+   "id": "6d68d164",
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@@ -3790,7 +3790,7 @@
   {
    "cell_type": "code",
    "execution_count": 18,
-   "id": "3005bd92",
+   "id": "62941e80",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3818,7 +3818,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "04bdef60",
+   "id": "6cb5854c",
    "metadata": {
     "editable": true
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@@ -3833,7 +3833,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a1d9ac85",
+   "id": "0f020be0",
    "metadata": {
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@@ -3844,7 +3844,7 @@
   {
    "cell_type": "code",
    "execution_count": 19,
-   "id": "65d8699f",
+   "id": "e5965dba",
    "metadata": {
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     "editable": true
@@ -3872,7 +3872,7 @@
   },
   {
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-   "id": "17e4a121",
+   "id": "4fda2696",
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@@ -3883,7 +3883,7 @@
   {
    "cell_type": "code",
    "execution_count": 20,
-   "id": "5b084f53",
+   "id": "0b9676dc",
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     "editable": true
@@ -3908,7 +3908,7 @@
   },
   {
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-   "id": "c01c884c",
+   "id": "8ff80d91",
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@@ -3919,7 +3919,7 @@
   {
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-   "id": "e754586c",
+   "id": "5f4d0102",
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     "editable": true
@@ -3955,7 +3955,7 @@
   {
    "cell_type": "code",
    "execution_count": 22,
-   "id": "e4f7978b",
+   "id": "3f8b4ad2",
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     "editable": true
@@ -3975,7 +3975,7 @@
   },
   {
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-   "id": "93df689e",
+   "id": "73ba827e",
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@@ -3986,7 +3986,7 @@
   {
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-   "id": "37e9e5b9",
+   "id": "64287fb6",
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     "editable": true
@@ -4024,7 +4024,7 @@
   },
   {
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-   "id": "29be446d",
+   "id": "74b5a650",
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@@ -4034,7 +4034,7 @@
   },
   {
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-   "id": "2a767360",
+   "id": "7c7682a2",
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@@ -4048,7 +4048,7 @@
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-   "id": "7d1f5e1d",
+   "id": "2df6d5fa",
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     "editable": true
@@ -4070,7 +4070,7 @@
   },
   {
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-   "id": "c8c8ddaa",
+   "id": "046d504c",
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@@ -4080,7 +4080,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c97dfce1",
+   "id": "9cecf8ec",
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@@ -4091,7 +4091,7 @@
   {
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-   "id": "fde637e3",
+   "id": "2fdf4198",
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     "editable": true
@@ -4113,7 +4113,7 @@
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+   "id": "aebb4654",
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@@ -4126,7 +4126,7 @@
   {
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-   "id": "82159461",
+   "id": "4a037ad2",
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@@ -4151,7 +4151,7 @@
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@@ -4163,7 +4163,7 @@
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-   "id": "c4d23571",
+   "id": "bb3b2c6a",
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     "editable": true
@@ -4178,7 +4178,7 @@
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-   "id": "7001568b",
+   "id": "558fd2fc",
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@@ -4193,7 +4193,7 @@
   {
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-   "id": "810cf0da",
+   "id": "c12f2493",
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@@ -4253,7 +4253,7 @@
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@@ -4264,7 +4264,7 @@
   {
    "cell_type": "code",
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-   "id": "e639b847",
+   "id": "fbe398ca",
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@@ -4328,18 +4328,18 @@
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-   "id": "b9323bd9",
+   "id": "f6fa9dba",
    "metadata": {
     "editable": true
    },
    "source": [
-    "## But noen of these can compete with Newton's method"
+    "## But none of these can compete with Newton's method"
    ]
   },
   {
    "cell_type": "code",
    "execution_count": 30,
-   "id": "490cc861",
+   "id": "a5569bea",
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     "editable": true
@@ -4388,7 +4388,7 @@
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+   "id": "2fd0cd08",
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@@ -4400,7 +4400,7 @@
   {
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-   "id": "6a3d447a",
+   "id": "0650c8ed",
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@@ -4484,7 +4484,7 @@
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+   "id": "fc253f2c",
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@@ -4495,7 +4495,7 @@
   {
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-   "id": "b79a45a6",
+   "id": "1857bc5f",
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@@ -4573,7 +4573,7 @@
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+   "id": "2f4094da",
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@@ -4584,7 +4584,7 @@
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    "cell_type": "code",
    "execution_count": 33,
-   "id": "9d5d75f1",
+   "id": "c646471b",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -4643,7 +4643,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d05e7d4b",
+   "id": "4c6b0a6b",
    "metadata": {
     "editable": true
    },
@@ -4653,7 +4653,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "def828b0",
+   "id": "03e602db",
    "metadata": {
     "editable": true
    },
@@ -4664,7 +4664,7 @@
   {
    "cell_type": "code",
    "execution_count": 34,
-   "id": "94157fd9",
+   "id": "f679b1c8",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -4729,7 +4729,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c71c15c7",
+   "id": "2a846058",
    "metadata": {
     "editable": true
    },
@@ -4740,7 +4740,7 @@
   {
    "cell_type": "code",
    "execution_count": 35,
-   "id": "78763412",
+   "id": "cdeee223",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -4810,7 +4810,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "bccda1f8",
+   "id": "2665fcce",
    "metadata": {
     "editable": true
    },
@@ -4821,7 +4821,7 @@
   {
    "cell_type": "code",
    "execution_count": 36,
-   "id": "4febcd9b",
+   "id": "045802dd",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -4865,7 +4865,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6b50caae",
+   "id": "1906242b",
    "metadata": {
     "editable": true
    },
@@ -4884,7 +4884,7 @@
   {
    "cell_type": "code",
    "execution_count": 37,
-   "id": "ef30c686",
+   "id": "79c726a2",
    "metadata": {
     "collapsed": false,
     "editable": true
diff --git a/doc/src/week39/week39.do.txt b/doc/src/week39/week39.do.txt
index 7f8eb33c1..a093c38b4 100644
--- a/doc/src/week39/week39.do.txt
+++ b/doc/src/week39/week39.do.txt
@@ -2272,7 +2272,7 @@ print(theta)
 !ec
 
 !split
-===== But noen of these can compete with Newton's method =====
+===== But none of these can compete with Newton's method =====
 
 !bc pycod
 # Using Newton's method