diff --git a/doc/pub/week43/html/week43-bs.html b/doc/pub/week43/html/week43-bs.html
index 41b3601b8..3035e24df 100644
--- a/doc/pub/week43/html/week43-bs.html
+++ b/doc/pub/week43/html/week43-bs.html
@@ -286,7 +286,7 @@ MathJax.Hub.Config({
 </center>
 <br>
 <center>
-<h4>Oct 27, 2022</h4>
+<h4>Oct 28, 2022</h4>
 </center> <!-- date -->
 <br>
 
@@ -630,7 +630,7 @@ We note first that the new coefficients are given as
 $$
 \begin{split}
 \delta_0=&\alpha_0\beta_0\\
-\delta_1=&\alpha_1\beta_0+\alpha_1\beta_0\\
+\delta_1=&\alpha_1\beta_0+\alpha_0\beta_1\\
 \delta_2=&\alpha_0\beta_2+\alpha_1\beta_1+\alpha_2\beta_0\\
 \delta_3=&\alpha_1\beta_2+\alpha_2\beta_1+\alpha_0\beta_3\\
 \delta_4=&\alpha_2\beta_2+\alpha_1\beta_3\\
diff --git a/doc/pub/week43/html/week43-reveal.html b/doc/pub/week43/html/week43-reveal.html
index 2a85fb973..aacb5cbe2 100644
--- a/doc/pub/week43/html/week43-reveal.html
+++ b/doc/pub/week43/html/week43-reveal.html
@@ -184,7 +184,7 @@ MathJax.Hub.Config({
 </center>
 <br>
 <center>
-<h4>Oct 27, 2022</h4>
+<h4>Oct 28, 2022</h4>
 </center> <!-- date -->
 <br>
 
@@ -557,7 +557,7 @@ We note first that the new coefficients are given as
 $$
 \begin{split}
 \delta_0=&\alpha_0\beta_0\\
-\delta_1=&\alpha_1\beta_0+\alpha_1\beta_0\\
+\delta_1=&\alpha_1\beta_0+\alpha_0\beta_1\\
 \delta_2=&\alpha_0\beta_2+\alpha_1\beta_1+\alpha_2\beta_0\\
 \delta_3=&\alpha_1\beta_2+\alpha_2\beta_1+\alpha_0\beta_3\\
 \delta_4=&\alpha_2\beta_2+\alpha_1\beta_3\\
diff --git a/doc/pub/week43/html/week43-solarized.html b/doc/pub/week43/html/week43-solarized.html
index f9bfb93a9..d6e97b7db 100644
--- a/doc/pub/week43/html/week43-solarized.html
+++ b/doc/pub/week43/html/week43-solarized.html
@@ -228,7 +228,7 @@ MathJax.Hub.Config({
 </center>
 <br>
 <center>
-<h4>Oct 27, 2022</h4>
+<h4>Oct 28, 2022</h4>
 </center> <!-- date -->
 <br>
 
@@ -565,7 +565,7 @@ We note first that the new coefficients are given as
 $$
 \begin{split}
 \delta_0=&\alpha_0\beta_0\\
-\delta_1=&\alpha_1\beta_0+\alpha_1\beta_0\\
+\delta_1=&\alpha_1\beta_0+\alpha_0\beta_1\\
 \delta_2=&\alpha_0\beta_2+\alpha_1\beta_1+\alpha_2\beta_0\\
 \delta_3=&\alpha_1\beta_2+\alpha_2\beta_1+\alpha_0\beta_3\\
 \delta_4=&\alpha_2\beta_2+\alpha_1\beta_3\\
diff --git a/doc/pub/week43/html/week43.html b/doc/pub/week43/html/week43.html
index 952246398..f8717f5d2 100644
--- a/doc/pub/week43/html/week43.html
+++ b/doc/pub/week43/html/week43.html
@@ -305,7 +305,7 @@ MathJax.Hub.Config({
 </center>
 <br>
 <center>
-<h4>Oct 27, 2022</h4>
+<h4>Oct 28, 2022</h4>
 </center> <!-- date -->
 <br>
 
@@ -642,7 +642,7 @@ We note first that the new coefficients are given as
 $$
 \begin{split}
 \delta_0=&\alpha_0\beta_0\\
-\delta_1=&\alpha_1\beta_0+\alpha_1\beta_0\\
+\delta_1=&\alpha_1\beta_0+\alpha_0\beta_1\\
 \delta_2=&\alpha_0\beta_2+\alpha_1\beta_1+\alpha_2\beta_0\\
 \delta_3=&\alpha_1\beta_2+\alpha_2\beta_1+\alpha_0\beta_3\\
 \delta_4=&\alpha_2\beta_2+\alpha_1\beta_3\\
diff --git a/doc/pub/week43/ipynb/ipynb-week43-src.tar.gz b/doc/pub/week43/ipynb/ipynb-week43-src.tar.gz
index 04b26bcb5..322104dc2 100644
Binary files a/doc/pub/week43/ipynb/ipynb-week43-src.tar.gz and b/doc/pub/week43/ipynb/ipynb-week43-src.tar.gz differ
diff --git a/doc/pub/week43/ipynb/week43.ipynb b/doc/pub/week43/ipynb/week43.ipynb
index 0ccd5f6b4..8403f4c6c 100644
--- a/doc/pub/week43/ipynb/week43.ipynb
+++ b/doc/pub/week43/ipynb/week43.ipynb
@@ -2,7 +2,7 @@
  "cells": [
   {
    "cell_type": "markdown",
-   "id": "7522bb10",
+   "id": "64f0fb95",
    "metadata": {
     "editable": true
    },
@@ -14,7 +14,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9fa38ab9",
+   "id": "ec4435d5",
    "metadata": {
     "editable": true
    },
@@ -22,14 +22,14 @@
     "# Week 43: Deep Learning: Convolutional Neural Networks and Recurrent Neural Networks\n",
     "**Morten Hjorth-Jensen**, Department of Physics, University of Oslo and Department of Physics and Astronomy and National Superconducting Cyclotron Laboratory, Michigan State University\n",
     "\n",
-    "Date: **Oct 27, 2022**\n",
+    "Date: **Oct 28, 2022**\n",
     "\n",
     "Copyright 1999-2022, Morten Hjorth-Jensen. Released under CC Attribution-NonCommercial 4.0 license"
    ]
   },
   {
    "cell_type": "markdown",
-   "id": "44923e92",
+   "id": "d36232f9",
    "metadata": {
     "editable": true
    },
@@ -59,7 +59,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b26c0a48",
+   "id": "73938052",
    "metadata": {
     "editable": true
    },
@@ -85,7 +85,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d5a86eb6",
+   "id": "230b9055",
    "metadata": {
     "editable": true
    },
@@ -112,7 +112,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "aa84d1a3",
+   "id": "d15c3dc6",
    "metadata": {
     "editable": true
    },
@@ -134,7 +134,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f0e337a7",
+   "id": "cf6057f4",
    "metadata": {
     "editable": true
    },
@@ -152,7 +152,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "eb8cbc25",
+   "id": "13df44dc",
    "metadata": {
     "editable": true
    },
@@ -182,7 +182,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4fe9a72c",
+   "id": "d4317855",
    "metadata": {
     "editable": true
    },
@@ -212,7 +212,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "bac12c16",
+   "id": "edb251e1",
    "metadata": {
     "editable": true
    },
@@ -252,7 +252,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d07b5b20",
+   "id": "8e0d0bb5",
    "metadata": {
     "editable": true
    },
@@ -281,7 +281,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "81017b8b",
+   "id": "1045f868",
    "metadata": {
     "editable": true
    },
@@ -303,7 +303,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a54dcf48",
+   "id": "989ee7f3",
    "metadata": {
     "editable": true
    },
@@ -332,7 +332,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "5e2384c4",
+   "id": "c9db3ad1",
    "metadata": {
     "editable": true
    },
@@ -349,7 +349,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a12ce17b",
+   "id": "0d6f1fa0",
    "metadata": {
     "editable": true
    },
@@ -369,7 +369,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8fcd3741",
+   "id": "93186e95",
    "metadata": {
     "editable": true
    },
@@ -381,7 +381,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "217cb909",
+   "id": "3d7ea176",
    "metadata": {
     "editable": true
    },
@@ -393,7 +393,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f3738594",
+   "id": "96afecaf",
    "metadata": {
     "editable": true
    },
@@ -405,7 +405,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "baafc092",
+   "id": "2fca2b28",
    "metadata": {
     "editable": true
    },
@@ -415,7 +415,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "dad3de2e",
+   "id": "be464e2e",
    "metadata": {
     "editable": true
    },
@@ -427,7 +427,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7b8f81cb",
+   "id": "b65a0439",
    "metadata": {
     "editable": true
    },
@@ -439,7 +439,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "17032e64",
+   "id": "2df4dfd9",
    "metadata": {
     "editable": true
    },
@@ -454,7 +454,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7578708a",
+   "id": "4a9ba5c1",
    "metadata": {
     "editable": true
    },
@@ -466,7 +466,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "5cfc6e51",
+   "id": "809dc4d2",
    "metadata": {
     "editable": true
    },
@@ -476,7 +476,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "710ea882",
+   "id": "5c0ee27d",
    "metadata": {
     "editable": true
    },
@@ -488,7 +488,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "bad901dd",
+   "id": "1b05fc18",
    "metadata": {
     "editable": true
    },
@@ -498,7 +498,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ebaa1c8b",
+   "id": "c65cb2b7",
    "metadata": {
     "editable": true
    },
@@ -510,7 +510,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "11d1cd5f",
+   "id": "99c7c3dc",
    "metadata": {
     "editable": true
    },
@@ -523,7 +523,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "69918cae",
+   "id": "53d53bbc",
    "metadata": {
     "editable": true
    },
@@ -531,7 +531,7 @@
     "$$\n",
     "\\begin{split}\n",
     "\\delta_0=&\\alpha_0\\beta_0\\\\\n",
-    "\\delta_1=&\\alpha_1\\beta_0+\\alpha_1\\beta_0\\\\\n",
+    "\\delta_1=&\\alpha_1\\beta_0+\\alpha_0\\beta_1\\\\\n",
     "\\delta_2=&\\alpha_0\\beta_2+\\alpha_1\\beta_1+\\alpha_2\\beta_0\\\\\n",
     "\\delta_3=&\\alpha_1\\beta_2+\\alpha_2\\beta_1+\\alpha_0\\beta_3\\\\\n",
     "\\delta_4=&\\alpha_2\\beta_2+\\alpha_1\\beta_3\\\\\n",
@@ -542,7 +542,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "cdfaca12",
+   "id": "94ac0ef9",
    "metadata": {
     "editable": true
    },
@@ -554,7 +554,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e2e02e78",
+   "id": "c4f33864",
    "metadata": {
     "editable": true
    },
@@ -566,7 +566,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "02925f0b",
+   "id": "92652c28",
    "metadata": {
     "editable": true
    },
@@ -576,7 +576,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d96d32df",
+   "id": "56a16a6a",
    "metadata": {
     "editable": true
    },
@@ -588,7 +588,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "216f2315",
+   "id": "92636cff",
    "metadata": {
     "editable": true
    },
@@ -598,7 +598,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7c146f3c",
+   "id": "560ed487",
    "metadata": {
     "editable": true
    },
@@ -612,7 +612,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d0a10b06",
+   "id": "2be56ff2",
    "metadata": {
     "editable": true
    },
@@ -630,7 +630,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "80467c10",
+   "id": "e277d2e6",
    "metadata": {
     "editable": true
    },
@@ -641,7 +641,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f15078b7",
+   "id": "44fd182f",
    "metadata": {
     "editable": true
    },
@@ -659,7 +659,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "0b9cde15",
+   "id": "3e977804",
    "metadata": {
     "editable": true
    },
@@ -673,7 +673,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9fb7215b",
+   "id": "48348573",
    "metadata": {
     "editable": true
    },
@@ -687,7 +687,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9c5f8278",
+   "id": "bd57bb0b",
    "metadata": {
     "editable": true
    },
@@ -699,7 +699,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8aa5296f",
+   "id": "a03db30b",
    "metadata": {
     "editable": true
    },
@@ -709,7 +709,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f64c9a83",
+   "id": "621656e3",
    "metadata": {
     "editable": true
    },
@@ -721,7 +721,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f4962d1c",
+   "id": "2a5d79f2",
    "metadata": {
     "editable": true
    },
@@ -731,7 +731,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "5ee43541",
+   "id": "ced1dd7d",
    "metadata": {
     "editable": true
    },
@@ -743,7 +743,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c9a5114b",
+   "id": "58154535",
    "metadata": {
     "editable": true
    },
@@ -755,7 +755,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c5be6041",
+   "id": "cb5e7c3b",
    "metadata": {
     "editable": true
    },
@@ -782,7 +782,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b2fbb54b",
+   "id": "2c679c06",
    "metadata": {
     "editable": true
    },
@@ -794,7 +794,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ee8c00c4",
+   "id": "1b6db8ba",
    "metadata": {
     "editable": true
    },
@@ -804,7 +804,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "132bc35b",
+   "id": "fb8f30dc",
    "metadata": {
     "editable": true
    },
@@ -830,7 +830,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "50a783f9",
+   "id": "a06b6155",
    "metadata": {
     "editable": true
    },
@@ -842,7 +842,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "046ae3ad",
+   "id": "f6e9bbbe",
    "metadata": {
     "editable": true
    },
@@ -861,7 +861,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f3fcddc0",
+   "id": "ff616494",
    "metadata": {
     "editable": true
    },
@@ -874,7 +874,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "700fc5fd",
+   "id": "97b7bd6b",
    "metadata": {
     "editable": true
    },
@@ -886,7 +886,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c2664f02",
+   "id": "40c08862",
    "metadata": {
     "editable": true
    },
@@ -907,7 +907,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1737b376",
+   "id": "f356a8f2",
    "metadata": {
     "editable": true
    },
@@ -928,7 +928,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d88e4a3e",
+   "id": "2e3e8fab",
    "metadata": {
     "editable": true
    },
@@ -953,7 +953,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "83f7ed50",
+   "id": "0d321e12",
    "metadata": {
     "editable": true
    },
@@ -972,7 +972,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ed2b3383",
+   "id": "5c33ad7b",
    "metadata": {
     "editable": true
    },
@@ -983,7 +983,7 @@
   {
    "cell_type": "code",
    "execution_count": 1,
-   "id": "48f52f62",
+   "id": "f92b952c",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1036,7 +1036,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "0e299097",
+   "id": "bc853b74",
    "metadata": {
     "editable": true
    },
@@ -1047,7 +1047,7 @@
   {
    "cell_type": "code",
    "execution_count": 2,
-   "id": "706ec125",
+   "id": "968f01ec",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1080,7 +1080,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1f8122ce",
+   "id": "4f12bd24",
    "metadata": {
     "editable": true
    },
@@ -1091,7 +1091,7 @@
   {
    "cell_type": "code",
    "execution_count": 3,
-   "id": "3ab72397",
+   "id": "0e81b3b9",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1128,7 +1128,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b76ba870",
+   "id": "a180bb4f",
    "metadata": {
     "editable": true
    },
@@ -1139,7 +1139,7 @@
   {
    "cell_type": "code",
    "execution_count": 4,
-   "id": "45cb54aa",
+   "id": "c32d897b",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1166,7 +1166,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c8739707",
+   "id": "4d53cf65",
    "metadata": {
     "editable": true
    },
@@ -1177,7 +1177,7 @@
   {
    "cell_type": "code",
    "execution_count": 5,
-   "id": "f7ca4310",
+   "id": "0f1e5f83",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1218,7 +1218,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "42c3443b",
+   "id": "e6468862",
    "metadata": {
     "editable": true
    },
@@ -1234,7 +1234,7 @@
   {
    "cell_type": "code",
    "execution_count": 6,
-   "id": "d962d4b0",
+   "id": "58aaf533",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1255,7 +1255,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1eaf1d3f",
+   "id": "d8f52e33",
    "metadata": {
     "editable": true
    },
@@ -1268,7 +1268,7 @@
   {
    "cell_type": "code",
    "execution_count": 7,
-   "id": "8d41ea18",
+   "id": "afd58fba",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1293,7 +1293,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "fdf251d0",
+   "id": "26008a78",
    "metadata": {
     "editable": true
    },
@@ -1308,7 +1308,7 @@
   {
    "cell_type": "code",
    "execution_count": 8,
-   "id": "cc1013a0",
+   "id": "fdf773da",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1329,7 +1329,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f8e24b7c",
+   "id": "9ebc2edb",
    "metadata": {
     "editable": true
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@@ -1339,7 +1339,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c0df0d51",
+   "id": "3b98a7e4",
    "metadata": {
     "editable": true
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@@ -1358,7 +1358,7 @@
   {
    "cell_type": "code",
    "execution_count": 9,
-   "id": "20a57f1e",
+   "id": "3bfb8db3",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1375,7 +1375,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "3adf1db1",
+   "id": "ceb8c2c4",
    "metadata": {
     "editable": true
    },
@@ -1385,7 +1385,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "67acd5dd",
+   "id": "f762fe86",
    "metadata": {
     "editable": true
    },
@@ -1396,7 +1396,7 @@
   {
    "cell_type": "code",
    "execution_count": 10,
-   "id": "5233ec0d",
+   "id": "c088fa80",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1413,7 +1413,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "fdc66ee9",
+   "id": "6a58f2f9",
    "metadata": {
     "editable": true
    },
@@ -1424,7 +1424,7 @@
   {
    "cell_type": "code",
    "execution_count": 11,
-   "id": "3b0d6234",
+   "id": "970b93c1",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1445,7 +1445,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "796df4ac",
+   "id": "595bbe49",
    "metadata": {
     "editable": true
    },
@@ -1472,7 +1472,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4fac5939",
+   "id": "a6a3ceed",
    "metadata": {
     "editable": true
    },
@@ -1484,7 +1484,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4a356df2",
+   "id": "1c11cfe0",
    "metadata": {
     "editable": true
    },
@@ -1495,7 +1495,7 @@
   {
    "cell_type": "code",
    "execution_count": 12,
-   "id": "c06165b0",
+   "id": "3c9c960e",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1574,7 +1574,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "13d480d9",
+   "id": "3ead3155",
    "metadata": {
     "editable": true
    },
@@ -1590,7 +1590,7 @@
   {
    "cell_type": "code",
    "execution_count": 13,
-   "id": "c92209d6",
+   "id": "ccae4f21",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1629,7 +1629,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "2a4b3320",
+   "id": "7d6b63a0",
    "metadata": {
     "editable": true
    },
@@ -1673,7 +1673,7 @@
   {
    "cell_type": "code",
    "execution_count": 14,
-   "id": "4a3a194c",
+   "id": "671b8076",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1756,7 +1756,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "0acf275c",
+   "id": "9b7b896b",
    "metadata": {
     "editable": true
    },
@@ -1767,7 +1767,7 @@
   {
    "cell_type": "code",
    "execution_count": 15,
-   "id": "62cbd2cf",
+   "id": "33bb81ea",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1869,7 +1869,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "90f40f65",
+   "id": "421951bd",
    "metadata": {
     "editable": true
    },
@@ -1891,7 +1891,7 @@
   {
    "cell_type": "code",
    "execution_count": 16,
-   "id": "ac4234cd",
+   "id": "cce1b4fc",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1988,7 +1988,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6dd1727f",
+   "id": "b1eac503",
    "metadata": {
     "editable": true
    },
@@ -2014,7 +2014,7 @@
   {
    "cell_type": "code",
    "execution_count": 17,
-   "id": "dbc8a148",
+   "id": "54144082",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2215,7 +2215,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "5db3b932",
+   "id": "102d34c5",
    "metadata": {
     "editable": true
    },
@@ -2239,7 +2239,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "91878f2c",
+   "id": "850021bc",
    "metadata": {
     "editable": true
    },
@@ -2259,7 +2259,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "17cba816",
+   "id": "17b9ceac",
    "metadata": {
     "editable": true
    },
@@ -2277,7 +2277,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4bfd6979",
+   "id": "356c6b8d",
    "metadata": {
     "editable": true
    },
@@ -2292,7 +2292,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "40bbb8c2",
+   "id": "3ac797c4",
    "metadata": {
     "editable": true
    },
@@ -2310,7 +2310,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b8d2a62a",
+   "id": "234ecc59",
    "metadata": {
     "editable": true
    },
@@ -2323,7 +2323,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f041014a",
+   "id": "aa46be2b",
    "metadata": {
     "editable": true
    },
@@ -2341,7 +2341,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "b4b83790",
+   "id": "916b05b5",
    "metadata": {
     "editable": true
    },
@@ -2352,7 +2352,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "cebceb82",
+   "id": "f1596b0b",
    "metadata": {
     "editable": true
    },
@@ -2370,7 +2370,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ba341894",
+   "id": "29c9cda8",
    "metadata": {
     "editable": true
    },
@@ -2397,7 +2397,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c8bc3f5c",
+   "id": "0d0f4f2a",
    "metadata": {
     "editable": true
    },
@@ -2409,7 +2409,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "35290d84",
+   "id": "26ad50df",
    "metadata": {
     "editable": true
    },
@@ -2428,7 +2428,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "45957827",
+   "id": "28576f76",
    "metadata": {
     "editable": true
    },
@@ -2438,7 +2438,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "88dbad8f",
+   "id": "69f18cef",
    "metadata": {
     "editable": true
    },
@@ -2458,7 +2458,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e7beed19",
+   "id": "e98fe7bd",
    "metadata": {
     "editable": true
    },
@@ -2470,7 +2470,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "310a2251",
+   "id": "33625620",
    "metadata": {
     "editable": true
    },
@@ -2488,7 +2488,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8f1dcb0e",
+   "id": "03ade079",
    "metadata": {
     "editable": true
    },
@@ -2500,7 +2500,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "6bc694b7",
+   "id": "41f30d1c",
    "metadata": {
     "editable": true
    },
@@ -2521,7 +2521,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "02697de0",
+   "id": "e62959d8",
    "metadata": {
     "editable": true
    },
@@ -2538,7 +2538,7 @@
   {
    "cell_type": "code",
    "execution_count": 18,
-   "id": "0cd20c57",
+   "id": "1c0fe176",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2556,7 +2556,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "1086b981",
+   "id": "e059945f",
    "metadata": {
     "editable": true
    },
@@ -2567,7 +2567,7 @@
   {
    "cell_type": "code",
    "execution_count": 19,
-   "id": "314a3708",
+   "id": "b46c3171",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2593,7 +2593,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "0849f87c",
+   "id": "eda283cb",
    "metadata": {
     "editable": true
    },
@@ -2606,7 +2606,7 @@
   {
    "cell_type": "code",
    "execution_count": 20,
-   "id": "2054bef1",
+   "id": "e7be1c2e",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2619,7 +2619,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e664b9f9",
+   "id": "6a3e4f06",
    "metadata": {
     "editable": true
    },
@@ -2638,7 +2638,7 @@
   {
    "cell_type": "code",
    "execution_count": 21,
-   "id": "ac88dfd2",
+   "id": "aaf9a85c",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2706,7 +2706,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ccf2be58",
+   "id": "05051929",
    "metadata": {
     "editable": true
    },
@@ -2719,7 +2719,7 @@
   {
    "cell_type": "code",
    "execution_count": 22,
-   "id": "721e2151",
+   "id": "47dfdf75",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2759,7 +2759,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7f17402b",
+   "id": "4e4c9b20",
    "metadata": {
     "editable": true
    },
@@ -2771,7 +2771,7 @@
   {
    "cell_type": "code",
    "execution_count": 23,
-   "id": "696170af",
+   "id": "1c73bbbb",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2785,7 +2785,7 @@
   {
    "cell_type": "code",
    "execution_count": 24,
-   "id": "0bed874b",
+   "id": "cb263f7b",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2798,7 +2798,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "cb12ad41",
+   "id": "594a6faa",
    "metadata": {
     "editable": true
    },
@@ -2809,7 +2809,7 @@
   {
    "cell_type": "code",
    "execution_count": 25,
-   "id": "13795379",
+   "id": "b4bf2541",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2823,7 +2823,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "2b127fe1",
+   "id": "30f5f988",
    "metadata": {
     "editable": true
    },
@@ -2838,7 +2838,7 @@
   {
    "cell_type": "code",
    "execution_count": 26,
-   "id": "805cbeeb",
+   "id": "0057bc45",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2854,7 +2854,7 @@
   {
    "cell_type": "code",
    "execution_count": 27,
-   "id": "3889e2a4",
+   "id": "b7d13cf5",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2871,7 +2871,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e08f72a7",
+   "id": "b66ef096",
    "metadata": {
     "editable": true
    },
@@ -2883,7 +2883,7 @@
   {
    "cell_type": "code",
    "execution_count": 28,
-   "id": "86a062a0",
+   "id": "265edec4",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2897,7 +2897,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "bb4c1530",
+   "id": "d8b925a9",
    "metadata": {
     "editable": true
    },
@@ -2913,7 +2913,7 @@
   {
    "cell_type": "code",
    "execution_count": 29,
-   "id": "f0130a9b",
+   "id": "4c24e07c",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2947,7 +2947,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4a2d5b52",
+   "id": "226e11aa",
    "metadata": {
     "editable": true
    },
@@ -2960,7 +2960,7 @@
   {
    "cell_type": "code",
    "execution_count": 30,
-   "id": "252d7490",
+   "id": "12665849",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -2985,7 +2985,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "797c1592",
+   "id": "6dbda3fc",
    "metadata": {
     "editable": true
    },
@@ -2999,7 +2999,7 @@
   {
    "cell_type": "code",
    "execution_count": 31,
-   "id": "a58b0476",
+   "id": "f8e512f6",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3017,7 +3017,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "24a10c2a",
+   "id": "22d5f913",
    "metadata": {
     "editable": true
    },
@@ -3028,7 +3028,7 @@
   {
    "cell_type": "code",
    "execution_count": 32,
-   "id": "ff770653",
+   "id": "820c1dc6",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3068,7 +3068,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ba5a4878",
+   "id": "364f2202",
    "metadata": {
     "editable": true
    },
@@ -3080,7 +3080,7 @@
   {
    "cell_type": "code",
    "execution_count": 33,
-   "id": "b6797003",
+   "id": "edcb5cf6",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3092,7 +3092,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "41ceff9c",
+   "id": "0a69b6db",
    "metadata": {
     "editable": true
    },
@@ -3106,7 +3106,7 @@
   {
    "cell_type": "code",
    "execution_count": 34,
-   "id": "e5e7c0b1",
+   "id": "e62ec4b9",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3123,7 +3123,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "15380324",
+   "id": "30719441",
    "metadata": {
     "editable": true
    },
@@ -3137,7 +3137,7 @@
   {
    "cell_type": "code",
    "execution_count": 35,
-   "id": "1c52b1b9",
+   "id": "fdd86d94",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3154,7 +3154,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "007f55b9",
+   "id": "e650dcb0",
    "metadata": {
     "editable": true
    },
@@ -3170,7 +3170,7 @@
   {
    "cell_type": "code",
    "execution_count": 36,
-   "id": "08e5ac22",
+   "id": "c10ede25",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3198,7 +3198,7 @@
   {
    "cell_type": "code",
    "execution_count": 37,
-   "id": "76b9e71e",
+   "id": "007f5c1c",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3221,7 +3221,7 @@
   {
    "cell_type": "code",
    "execution_count": 38,
-   "id": "8b8509b1",
+   "id": "2e4e23bf",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3234,7 +3234,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "cb0c8e9a",
+   "id": "0d6229f1",
    "metadata": {
     "editable": true
    },
@@ -3250,7 +3250,7 @@
   {
    "cell_type": "code",
    "execution_count": 39,
-   "id": "e9a784d3",
+   "id": "331eb2c0",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3277,7 +3277,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "0146d042",
+   "id": "f40a0233",
    "metadata": {
     "editable": true
    },
@@ -3292,7 +3292,7 @@
   {
    "cell_type": "code",
    "execution_count": 40,
-   "id": "0cf5c894",
+   "id": "e7532cee",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3308,7 +3308,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "304c0564",
+   "id": "50d2c1af",
    "metadata": {
     "editable": true
    },
@@ -3319,7 +3319,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "fcf201cd",
+   "id": "1bb36160",
    "metadata": {
     "editable": true
    },
@@ -3337,7 +3337,7 @@
   {
    "cell_type": "code",
    "execution_count": 41,
-   "id": "e657581a",
+   "id": "94ff439b",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3355,7 +3355,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9105d810",
+   "id": "9ea83687",
    "metadata": {
     "editable": true
    },
@@ -3366,7 +3366,7 @@
   {
    "cell_type": "code",
    "execution_count": 42,
-   "id": "dfac0894",
+   "id": "8a4ae113",
    "metadata": {
     "collapsed": false,
     "editable": true
diff --git a/doc/src/week43/week43.do.txt b/doc/src/week43/week43.do.txt
index 49bbac9aa..a5574a954 100644
--- a/doc/src/week43/week43.do.txt
+++ b/doc/src/week43/week43.do.txt
@@ -302,7 +302,7 @@ We note first that the new coefficients are given as
 !bt
 \begin{split}
 \delta_0=&\alpha_0\beta_0\\
-\delta_1=&\alpha_1\beta_0+\alpha_1\beta_0\\
+\delta_1=&\alpha_1\beta_0+\alpha_0\beta_1\\
 \delta_2=&\alpha_0\beta_2+\alpha_1\beta_1+\alpha_2\beta_0\\
 \delta_3=&\alpha_1\beta_2+\alpha_2\beta_1+\alpha_0\beta_3\\
 \delta_4=&\alpha_2\beta_2+\alpha_1\beta_3\\