diff --git a/doc/pub/week2/html/._week2-bs000.html b/doc/pub/week2/html/._week2-bs000.html
index e717ce45..957e5fb2 100644
--- a/doc/pub/week2/html/._week2-bs000.html
+++ b/doc/pub/week2/html/._week2-bs000.html
@@ -8,8 +8,8 @@
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 <meta name="generator" content="DocOnce: https://github.com/doconce/doconce/" />
 <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-<meta name="description" content="Week 5 January 30-February 3, Building a Variational Monte Carlo program">
-<title>Week 5 January 30-February 3, Building a Variational Monte Carlo program</title>
+<meta name="description" content="Week 4 January 22-26, Building a Variational Monte Carlo program">
+<title>Week 4 January 22-26, Building a Variational Monte Carlo program</title>
 <!-- Bootstrap style: bootstrap -->
 <!-- doconce format html week2.do.txt --html_style=bootstrap --pygments_html_style=default --html_admon=bootstrap_panel --html_output=week2-bs --no_mako -->
 <link href="https://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css" rel="stylesheet">
@@ -36,10 +36,10 @@
 
 <!-- tocinfo
 {'highest level': 2,
- 'sections': [('Overview of week 5, january 30-February 3',
+ 'sections': [('Overview of week 4, January 22-26',
                2,
                None,
-               'overview-of-week-5-january-30-february-3'),
+               'overview-of-week-4-january-22-26'),
               ('Setting up a VMC code', 2, None, 'setting-up-a-vmc-code'),
               ('Introduction', 2, None, 'introduction'),
               ('Structure and Aims', 3, None, 'structure-and-aims'),
@@ -98,14 +98,14 @@
       <span class="icon-bar"></span>
       <span class="icon-bar"></span>
     </button>
-    <a class="navbar-brand" href="week2-bs.html">Week 5 January 30-February 3, Building a Variational Monte Carlo program</a>
+    <a class="navbar-brand" href="week2-bs.html">Week 4 January 22-26, Building a Variational Monte Carlo program</a>
   </div>
   <div class="navbar-collapse collapse navbar-responsive-collapse">
     <ul class="nav navbar-nav navbar-right">
       <li class="dropdown">
         <a href="#" class="dropdown-toggle" data-toggle="dropdown">Contents <b class="caret"></b></a>
         <ul class="dropdown-menu">
-     <!-- navigation toc: --> <li><a href="._week2-bs001.html#overview-of-week-5-january-30-february-3" style="font-size: 80%;"><b>Overview of week 5, january 30-February 3</b></a></li>
+     <!-- navigation toc: --> <li><a href="._week2-bs001.html#overview-of-week-4-january-22-26" style="font-size: 80%;"><b>Overview of week 4, January 22-26</b></a></li>
      <!-- navigation toc: --> <li><a href="._week2-bs002.html#setting-up-a-vmc-code" style="font-size: 80%;"><b>Setting up a VMC code</b></a></li>
      <!-- navigation toc: --> <li><a href="._week2-bs002.html#introduction" style="font-size: 80%;"><b>Introduction</b></a></li>
      <!-- navigation toc: --> <li><a href="._week2-bs002.html#structure-and-aims" style="font-size: 80%;">&nbsp;&nbsp;&nbsp;Structure and Aims</a></li>
@@ -130,7 +130,7 @@
 <!-- ------------------- main content ---------------------- -->
 <div class="jumbotron">
 <center>
-<h1>Week 5 January 30-February 3, Building a Variational Monte Carlo program </h1>
+<h1>Week 4 January 22-26, Building a Variational Monte Carlo program </h1>
 </center>  <!-- document title -->
 
 <!-- author(s): Morten Hjorth-Jensen  Email morten.hjorth-jensen@fys.uio.no -->
diff --git a/doc/pub/week2/html/._week2-bs001.html b/doc/pub/week2/html/._week2-bs001.html
index f93521cc..9e070b58 100644
--- a/doc/pub/week2/html/._week2-bs001.html
+++ b/doc/pub/week2/html/._week2-bs001.html
@@ -8,8 +8,8 @@
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 <meta name="generator" content="DocOnce: https://github.com/doconce/doconce/" />
 <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-<meta name="description" content="Week 5 January 30-February 3, Building a Variational Monte Carlo program">
-<title>Week 5 January 30-February 3, Building a Variational Monte Carlo program</title>
+<meta name="description" content="Week 4 January 22-26, Building a Variational Monte Carlo program">
+<title>Week 4 January 22-26, Building a Variational Monte Carlo program</title>
 <!-- Bootstrap style: bootstrap -->
 <!-- doconce format html week2.do.txt --html_style=bootstrap --pygments_html_style=default --html_admon=bootstrap_panel --html_output=week2-bs --no_mako -->
 <link href="https://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css" rel="stylesheet">
@@ -36,10 +36,10 @@
 
 <!-- tocinfo
 {'highest level': 2,
- 'sections': [('Overview of week 5, january 30-February 3',
+ 'sections': [('Overview of week 4, January 22-26',
                2,
                None,
-               'overview-of-week-5-january-30-february-3'),
+               'overview-of-week-4-january-22-26'),
               ('Setting up a VMC code', 2, None, 'setting-up-a-vmc-code'),
               ('Introduction', 2, None, 'introduction'),
               ('Structure and Aims', 3, None, 'structure-and-aims'),
@@ -98,14 +98,14 @@
       <span class="icon-bar"></span>
       <span class="icon-bar"></span>
     </button>
-    <a class="navbar-brand" href="week2-bs.html">Week 5 January 30-February 3, Building a Variational Monte Carlo program</a>
+    <a class="navbar-brand" href="week2-bs.html">Week 4 January 22-26, Building a Variational Monte Carlo program</a>
   </div>
   <div class="navbar-collapse collapse navbar-responsive-collapse">
     <ul class="nav navbar-nav navbar-right">
       <li class="dropdown">
         <a href="#" class="dropdown-toggle" data-toggle="dropdown">Contents <b class="caret"></b></a>
         <ul class="dropdown-menu">
-     <!-- navigation toc: --> <li><a href="#overview-of-week-5-january-30-february-3" style="font-size: 80%;"><b>Overview of week 5, january 30-February 3</b></a></li>
+     <!-- navigation toc: --> <li><a href="#overview-of-week-4-january-22-26" style="font-size: 80%;"><b>Overview of week 4, January 22-26</b></a></li>
      <!-- navigation toc: --> <li><a href="._week2-bs002.html#setting-up-a-vmc-code" style="font-size: 80%;"><b>Setting up a VMC code</b></a></li>
      <!-- navigation toc: --> <li><a href="._week2-bs002.html#introduction" style="font-size: 80%;"><b>Introduction</b></a></li>
      <!-- navigation toc: --> <li><a href="._week2-bs002.html#structure-and-aims" style="font-size: 80%;">&nbsp;&nbsp;&nbsp;Structure and Aims</a></li>
@@ -128,7 +128,7 @@
 <p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p> <!-- add vertical space -->
 <a name="part0001"></a>
 <!-- !split -->
-<h2 id="overview-of-week-5-january-30-february-3" class="anchor">Overview of week 5, january 30-February 3 </h2>
+<h2 id="overview-of-week-4-january-22-26" class="anchor">Overview of week 4, January 22-26 </h2>
 <div class="panel panel-default">
 <div class="panel-body">
 <!-- subsequent paragraphs come in larger fonts, so start with a paragraph -->
@@ -144,8 +144,8 @@ <h2 id="overview-of-week-5-january-30-february-3" class="anchor">Overview of wee
 <div class="panel-body">
 <!-- subsequent paragraphs come in larger fonts, so start with a paragraph -->
 <ul>
-<li> <a href="https://www.youtube.com/watch?v=wUULie1JWk4" target="_self">Video of lecture</a></li>
-<li> <a href="https://github.com/CompPhysics/ComputationalPhysics2/blob/gh-pages/doc/HandWrittenNotes/2023/NotesFebruary2.pdf" target="_self">Handwritten notes</a></li>
+<li> <a href="https://www.youtube.com/" target="_self">Video of lecture tba</a></li>
+<li> <a href="https://github.com/CompPhysics/ComputationalPhysics2/blob/gh-pages/doc/HandWrittenNotes/2024/NotesJanuary26.pdf" target="_self">Handwritten note tbas</a></li>
 <li> See also <a href="http://compphysics.github.io/ComputationalPhysics/doc/pub/rw/html/rw-bs.html" target="_self">Lectures from FYS3150/4150 on the Metropolis Algorithm</a></li>
 </ul>
 </div>
diff --git a/doc/pub/week2/html/._week2-bs002.html b/doc/pub/week2/html/._week2-bs002.html
index 0589230d..c61e0204 100644
--- a/doc/pub/week2/html/._week2-bs002.html
+++ b/doc/pub/week2/html/._week2-bs002.html
@@ -8,8 +8,8 @@
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 <meta name="generator" content="DocOnce: https://github.com/doconce/doconce/" />
 <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-<meta name="description" content="Week 5 January 30-February 3, Building a Variational Monte Carlo program">
-<title>Week 5 January 30-February 3, Building a Variational Monte Carlo program</title>
+<meta name="description" content="Week 4 January 22-26, Building a Variational Monte Carlo program">
+<title>Week 4 January 22-26, Building a Variational Monte Carlo program</title>
 <!-- Bootstrap style: bootstrap -->
 <!-- doconce format html week2.do.txt --html_style=bootstrap --pygments_html_style=default --html_admon=bootstrap_panel --html_output=week2-bs --no_mako -->
 <link href="https://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css" rel="stylesheet">
@@ -36,10 +36,10 @@
 
 <!-- tocinfo
 {'highest level': 2,
- 'sections': [('Overview of week 5, january 30-February 3',
+ 'sections': [('Overview of week 4, January 22-26',
                2,
                None,
-               'overview-of-week-5-january-30-february-3'),
+               'overview-of-week-4-january-22-26'),
               ('Setting up a VMC code', 2, None, 'setting-up-a-vmc-code'),
               ('Introduction', 2, None, 'introduction'),
               ('Structure and Aims', 3, None, 'structure-and-aims'),
@@ -98,14 +98,14 @@
       <span class="icon-bar"></span>
       <span class="icon-bar"></span>
     </button>
-    <a class="navbar-brand" href="week2-bs.html">Week 5 January 30-February 3, Building a Variational Monte Carlo program</a>
+    <a class="navbar-brand" href="week2-bs.html">Week 4 January 22-26, Building a Variational Monte Carlo program</a>
   </div>
   <div class="navbar-collapse collapse navbar-responsive-collapse">
     <ul class="nav navbar-nav navbar-right">
       <li class="dropdown">
         <a href="#" class="dropdown-toggle" data-toggle="dropdown">Contents <b class="caret"></b></a>
         <ul class="dropdown-menu">
-     <!-- navigation toc: --> <li><a href="._week2-bs001.html#overview-of-week-5-january-30-february-3" style="font-size: 80%;"><b>Overview of week 5, january 30-February 3</b></a></li>
+     <!-- navigation toc: --> <li><a href="._week2-bs001.html#overview-of-week-4-january-22-26" style="font-size: 80%;"><b>Overview of week 4, January 22-26</b></a></li>
      <!-- navigation toc: --> <li><a href="#setting-up-a-vmc-code" style="font-size: 80%;"><b>Setting up a VMC code</b></a></li>
      <!-- navigation toc: --> <li><a href="#introduction" style="font-size: 80%;"><b>Introduction</b></a></li>
      <!-- navigation toc: --> <li><a href="#structure-and-aims" style="font-size: 80%;">&nbsp;&nbsp;&nbsp;Structure and Aims</a></li>
diff --git a/doc/pub/week2/html/week2-bs.html b/doc/pub/week2/html/week2-bs.html
index e717ce45..957e5fb2 100644
--- a/doc/pub/week2/html/week2-bs.html
+++ b/doc/pub/week2/html/week2-bs.html
@@ -8,8 +8,8 @@
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 <meta name="generator" content="DocOnce: https://github.com/doconce/doconce/" />
 <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-<meta name="description" content="Week 5 January 30-February 3, Building a Variational Monte Carlo program">
-<title>Week 5 January 30-February 3, Building a Variational Monte Carlo program</title>
+<meta name="description" content="Week 4 January 22-26, Building a Variational Monte Carlo program">
+<title>Week 4 January 22-26, Building a Variational Monte Carlo program</title>
 <!-- Bootstrap style: bootstrap -->
 <!-- doconce format html week2.do.txt --html_style=bootstrap --pygments_html_style=default --html_admon=bootstrap_panel --html_output=week2-bs --no_mako -->
 <link href="https://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css" rel="stylesheet">
@@ -36,10 +36,10 @@
 
 <!-- tocinfo
 {'highest level': 2,
- 'sections': [('Overview of week 5, january 30-February 3',
+ 'sections': [('Overview of week 4, January 22-26',
                2,
                None,
-               'overview-of-week-5-january-30-february-3'),
+               'overview-of-week-4-january-22-26'),
               ('Setting up a VMC code', 2, None, 'setting-up-a-vmc-code'),
               ('Introduction', 2, None, 'introduction'),
               ('Structure and Aims', 3, None, 'structure-and-aims'),
@@ -98,14 +98,14 @@
       <span class="icon-bar"></span>
       <span class="icon-bar"></span>
     </button>
-    <a class="navbar-brand" href="week2-bs.html">Week 5 January 30-February 3, Building a Variational Monte Carlo program</a>
+    <a class="navbar-brand" href="week2-bs.html">Week 4 January 22-26, Building a Variational Monte Carlo program</a>
   </div>
   <div class="navbar-collapse collapse navbar-responsive-collapse">
     <ul class="nav navbar-nav navbar-right">
       <li class="dropdown">
         <a href="#" class="dropdown-toggle" data-toggle="dropdown">Contents <b class="caret"></b></a>
         <ul class="dropdown-menu">
-     <!-- navigation toc: --> <li><a href="._week2-bs001.html#overview-of-week-5-january-30-february-3" style="font-size: 80%;"><b>Overview of week 5, january 30-February 3</b></a></li>
+     <!-- navigation toc: --> <li><a href="._week2-bs001.html#overview-of-week-4-january-22-26" style="font-size: 80%;"><b>Overview of week 4, January 22-26</b></a></li>
      <!-- navigation toc: --> <li><a href="._week2-bs002.html#setting-up-a-vmc-code" style="font-size: 80%;"><b>Setting up a VMC code</b></a></li>
      <!-- navigation toc: --> <li><a href="._week2-bs002.html#introduction" style="font-size: 80%;"><b>Introduction</b></a></li>
      <!-- navigation toc: --> <li><a href="._week2-bs002.html#structure-and-aims" style="font-size: 80%;">&nbsp;&nbsp;&nbsp;Structure and Aims</a></li>
@@ -130,7 +130,7 @@
 <!-- ------------------- main content ---------------------- -->
 <div class="jumbotron">
 <center>
-<h1>Week 5 January 30-February 3, Building a Variational Monte Carlo program </h1>
+<h1>Week 4 January 22-26, Building a Variational Monte Carlo program </h1>
 </center>  <!-- document title -->
 
 <!-- author(s): Morten Hjorth-Jensen  Email morten.hjorth-jensen@fys.uio.no -->
diff --git a/doc/pub/week2/html/week2-reveal.html b/doc/pub/week2/html/week2-reveal.html
index 4016be4a..250d3433 100644
--- a/doc/pub/week2/html/week2-reveal.html
+++ b/doc/pub/week2/html/week2-reveal.html
@@ -9,8 +9,8 @@
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 <meta name="generator" content="DocOnce: https://github.com/doconce/doconce/" />
 <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-<meta name="description" content="Week 5 January 30-February 3, Building a Variational Monte Carlo program">
-<title>Week 5 January 30-February 3, Building a Variational Monte Carlo program</title>
+<meta name="description" content="Week 4 January 22-26, Building a Variational Monte Carlo program">
+<title>Week 4 January 22-26, Building a Variational Monte Carlo program</title>
 
 <!-- reveal.js: https://lab.hakim.se/reveal-js/ -->
 
@@ -168,7 +168,7 @@
 <section>
 <!-- ------------------- main content ---------------------- -->
 <center>
-<h1 style="text-align: center;">Week 5 January 30-February 3, Building a Variational Monte Carlo program </h1>
+<h1 style="text-align: center;">Week 4 January 22-26, Building a Variational Monte Carlo program </h1>
 </center>  <!-- document title -->
 
 <!-- author(s): Morten Hjorth-Jensen  Email morten.hjorth-jensen@fys.uio.no -->
@@ -195,7 +195,7 @@ <h4>January 30-February 3</h4>
 </section>
 
 <section>
-<h2 id="overview-of-week-5-january-30-february-3">Overview of week 5, january 30-February 3 </h2>
+<h2 id="overview-of-week-4-january-22-26">Overview of week 4, January 22-26 </h2>
 <div class="alert alert-block alert-block alert-text-normal">
 <b>Topics</b>
 <p>
@@ -210,8 +210,8 @@ <h2 id="overview-of-week-5-january-30-february-3">Overview of week 5, january 30
 <b>Teaching Material, videos and written material</b>
 <p>
 <ul>
-<p><li> <a href="https://www.youtube.com/watch?v=wUULie1JWk4" target="_blank">Video of lecture</a></li>
-<p><li> <a href="https://github.com/CompPhysics/ComputationalPhysics2/blob/gh-pages/doc/HandWrittenNotes/2023/NotesFebruary2.pdf" target="_blank">Handwritten notes</a></li>
+<p><li> <a href="https://www.youtube.com/" target="_blank">Video of lecture tba</a></li>
+<p><li> <a href="https://github.com/CompPhysics/ComputationalPhysics2/blob/gh-pages/doc/HandWrittenNotes/2024/NotesJanuary26.pdf" target="_blank">Handwritten note tbas</a></li>
 <p><li> See also <a href="http://compphysics.github.io/ComputationalPhysics/doc/pub/rw/html/rw-bs.html" target="_blank">Lectures from FYS3150/4150 on the Metropolis Algorithm</a></li>
 </ul>
 </div>
diff --git a/doc/pub/week2/html/week2-solarized.html b/doc/pub/week2/html/week2-solarized.html
index 16875f8b..2b90aa8c 100644
--- a/doc/pub/week2/html/week2-solarized.html
+++ b/doc/pub/week2/html/week2-solarized.html
@@ -8,8 +8,8 @@
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 <meta name="generator" content="DocOnce: https://github.com/doconce/doconce/" />
 <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-<meta name="description" content="Week 5 January 30-February 3, Building a Variational Monte Carlo program">
-<title>Week 5 January 30-February 3, Building a Variational Monte Carlo program</title>
+<meta name="description" content="Week 4 January 22-26, Building a Variational Monte Carlo program">
+<title>Week 4 January 22-26, Building a Variational Monte Carlo program</title>
 <link href="https://cdn.rawgit.com/doconce/doconce/master/bundled/html_styles/style_solarized_box/css/solarized_light_code.css" rel="stylesheet" type="text/css" title="light"/>
 <script src="https://cdn.rawgit.com/doconce/doconce/master/bundled/html_styles/style_solarized_box/js/highlight.pack.js"></script>
 <script>hljs.initHighlightingOnLoad();</script>
@@ -63,10 +63,10 @@
 
 <!-- tocinfo
 {'highest level': 2,
- 'sections': [('Overview of week 5, january 30-February 3',
+ 'sections': [('Overview of week 4, January 22-26',
                2,
                None,
-               'overview-of-week-5-january-30-february-3'),
+               'overview-of-week-4-january-22-26'),
               ('Setting up a VMC code', 2, None, 'setting-up-a-vmc-code'),
               ('Introduction', 2, None, 'introduction'),
               ('Structure and Aims', 3, None, 'structure-and-aims'),
@@ -119,7 +119,7 @@
 
 <!-- ------------------- main content ---------------------- -->
 <center>
-<h1>Week 5 January 30-February 3, Building a Variational Monte Carlo program </h1>
+<h1>Week 4 January 22-26, Building a Variational Monte Carlo program </h1>
 </center>  <!-- document title -->
 
 <!-- author(s): Morten Hjorth-Jensen  Email morten.hjorth-jensen@fys.uio.no -->
@@ -140,7 +140,7 @@ <h4>January 30-February 3</h4>
 <br>
 
 <!-- !split --><br><br><br><br><br><br><br><br><br><br>
-<h2 id="overview-of-week-5-january-30-february-3">Overview of week 5, january 30-February 3 </h2>
+<h2 id="overview-of-week-4-january-22-26">Overview of week 4, January 22-26 </h2>
 <div class="alert alert-block alert-block alert-text-normal">
 <b>Topics</b>
 <p>
@@ -155,8 +155,8 @@ <h2 id="overview-of-week-5-january-30-february-3">Overview of week 5, january 30
 <b>Teaching Material, videos and written material</b>
 <p>
 <ul>
-<li> <a href="https://www.youtube.com/watch?v=wUULie1JWk4" target="_blank">Video of lecture</a></li>
-<li> <a href="https://github.com/CompPhysics/ComputationalPhysics2/blob/gh-pages/doc/HandWrittenNotes/2023/NotesFebruary2.pdf" target="_blank">Handwritten notes</a></li>
+<li> <a href="https://www.youtube.com/" target="_blank">Video of lecture tba</a></li>
+<li> <a href="https://github.com/CompPhysics/ComputationalPhysics2/blob/gh-pages/doc/HandWrittenNotes/2024/NotesJanuary26.pdf" target="_blank">Handwritten note tbas</a></li>
 <li> See also <a href="http://compphysics.github.io/ComputationalPhysics/doc/pub/rw/html/rw-bs.html" target="_blank">Lectures from FYS3150/4150 on the Metropolis Algorithm</a></li>
 </ul>
 </div>
diff --git a/doc/pub/week2/html/week2.html b/doc/pub/week2/html/week2.html
index 5cee09fe..153f1501 100644
--- a/doc/pub/week2/html/week2.html
+++ b/doc/pub/week2/html/week2.html
@@ -8,8 +8,8 @@
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 <meta name="generator" content="DocOnce: https://github.com/doconce/doconce/" />
 <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-<meta name="description" content="Week 5 January 30-February 3, Building a Variational Monte Carlo program">
-<title>Week 5 January 30-February 3, Building a Variational Monte Carlo program</title>
+<meta name="description" content="Week 4 January 22-26, Building a Variational Monte Carlo program">
+<title>Week 4 January 22-26, Building a Variational Monte Carlo program</title>
 <style type="text/css">
 /* bloodish style */
 body {
@@ -140,10 +140,10 @@
 
 <!-- tocinfo
 {'highest level': 2,
- 'sections': [('Overview of week 5, january 30-February 3',
+ 'sections': [('Overview of week 4, January 22-26',
                2,
                None,
-               'overview-of-week-5-january-30-february-3'),
+               'overview-of-week-4-january-22-26'),
               ('Setting up a VMC code', 2, None, 'setting-up-a-vmc-code'),
               ('Introduction', 2, None, 'introduction'),
               ('Structure and Aims', 3, None, 'structure-and-aims'),
@@ -196,7 +196,7 @@
 
 <!-- ------------------- main content ---------------------- -->
 <center>
-<h1>Week 5 January 30-February 3, Building a Variational Monte Carlo program </h1>
+<h1>Week 4 January 22-26, Building a Variational Monte Carlo program </h1>
 </center>  <!-- document title -->
 
 <!-- author(s): Morten Hjorth-Jensen  Email morten.hjorth-jensen@fys.uio.no -->
@@ -217,7 +217,7 @@ <h4>January 30-February 3</h4>
 <br>
 
 <!-- !split --><br><br><br><br><br><br><br><br><br><br>
-<h2 id="overview-of-week-5-january-30-february-3">Overview of week 5, january 30-February 3 </h2>
+<h2 id="overview-of-week-4-january-22-26">Overview of week 4, January 22-26 </h2>
 <div class="alert alert-block alert-block alert-text-normal">
 <b>Topics</b>
 <p>
@@ -232,8 +232,8 @@ <h2 id="overview-of-week-5-january-30-february-3">Overview of week 5, january 30
 <b>Teaching Material, videos and written material</b>
 <p>
 <ul>
-<li> <a href="https://www.youtube.com/watch?v=wUULie1JWk4" target="_blank">Video of lecture</a></li>
-<li> <a href="https://github.com/CompPhysics/ComputationalPhysics2/blob/gh-pages/doc/HandWrittenNotes/2023/NotesFebruary2.pdf" target="_blank">Handwritten notes</a></li>
+<li> <a href="https://www.youtube.com/" target="_blank">Video of lecture tba</a></li>
+<li> <a href="https://github.com/CompPhysics/ComputationalPhysics2/blob/gh-pages/doc/HandWrittenNotes/2024/NotesJanuary26.pdf" target="_blank">Handwritten note tbas</a></li>
 <li> See also <a href="http://compphysics.github.io/ComputationalPhysics/doc/pub/rw/html/rw-bs.html" target="_blank">Lectures from FYS3150/4150 on the Metropolis Algorithm</a></li>
 </ul>
 </div>
diff --git a/doc/pub/week2/ipynb/ipynb-week2-src.tar.gz b/doc/pub/week2/ipynb/ipynb-week2-src.tar.gz
index c3eab720..adce2796 100644
Binary files a/doc/pub/week2/ipynb/ipynb-week2-src.tar.gz and b/doc/pub/week2/ipynb/ipynb-week2-src.tar.gz differ
diff --git a/doc/pub/week2/ipynb/week2.ipynb b/doc/pub/week2/ipynb/week2.ipynb
index 72273e00..fcacf2dd 100644
--- a/doc/pub/week2/ipynb/week2.ipynb
+++ b/doc/pub/week2/ipynb/week2.ipynb
@@ -2,24 +2,24 @@
  "cells": [
   {
    "cell_type": "markdown",
-   "id": "cc98db54",
+   "id": "1b710ea6",
    "metadata": {
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    },
    "source": [
     "<!-- HTML file automatically generated from DocOnce source (https://github.com/doconce/doconce/)\n",
     "doconce format html week2.do.txt --no_mako --no_abort -->\n",
-    "<!-- dom:TITLE: Week 5 January 30-February 3, Building a Variational Monte Carlo program  -->"
+    "<!-- dom:TITLE: Week 4 January 22-26, Building a Variational Monte Carlo program  -->"
    ]
   },
   {
    "cell_type": "markdown",
-   "id": "ef793d10",
+   "id": "83a00be6",
    "metadata": {
     "editable": true
    },
    "source": [
-    "# Week 5 January 30-February 3, Building a Variational Monte Carlo program \n",
+    "# Week 4 January 22-26, Building a Variational Monte Carlo program \n",
     "**Morten Hjorth-Jensen  Email morten.hjorth-jensen@fys.uio.no**, Department of Physics and Center fo Computing in Science Education, University of Oslo, Oslo, Norway and Department of Physics and Astronomy and Facility for Rare Ion Beams, Michigan State University, East Lansing, Michigan, USA\n",
     "\n",
     "Date: **January 30-February 3**"
@@ -27,12 +27,12 @@
   },
   {
    "cell_type": "markdown",
-   "id": "8c2f983a",
+   "id": "0fcd03ab",
    "metadata": {
     "editable": true
    },
    "source": [
-    "## Overview of week 5, january 30-February 3\n",
+    "## Overview of week 4, January 22-26\n",
     "**Topics.**\n",
     "\n",
     "* Essential ingredients: Variational Monte Carlo methods, Metropolis Algorithm, statistics and Markov Chain theory\n",
@@ -41,16 +41,16 @@
     "\n",
     "**Teaching Material, videos and written material.**\n",
     "\n",
-    "* [Video of lecture](https://www.youtube.com/watch?v=wUULie1JWk4)\n",
+    "* [Video of lecture tba](https://www.youtube.com/)\n",
     "\n",
-    "* [Handwritten notes](https://github.com/CompPhysics/ComputationalPhysics2/blob/gh-pages/doc/HandWrittenNotes/2023/NotesFebruary2.pdf)\n",
+    "* [Handwritten note tbas](https://github.com/CompPhysics/ComputationalPhysics2/blob/gh-pages/doc/HandWrittenNotes/2024/NotesJanuary26.pdf)\n",
     "\n",
     "* See also [Lectures from FYS3150/4150 on the Metropolis Algorithm](http://compphysics.github.io/ComputationalPhysics/doc/pub/rw/html/rw-bs.html)"
    ]
   },
   {
    "cell_type": "markdown",
-   "id": "75a0ea93",
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@@ -65,7 +65,7 @@
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@@ -75,7 +75,7 @@
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@@ -89,7 +89,7 @@
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@@ -161,7 +161,7 @@
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@@ -201,7 +201,7 @@
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@@ -213,7 +213,7 @@
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@@ -223,7 +223,7 @@
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@@ -277,7 +277,7 @@
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@@ -290,7 +290,7 @@
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@@ -302,7 +302,7 @@
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@@ -314,7 +314,7 @@
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@@ -326,7 +326,7 @@
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@@ -337,7 +337,7 @@
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@@ -351,7 +351,7 @@
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@@ -361,7 +361,7 @@
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@@ -377,7 +377,7 @@
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@@ -387,7 +387,7 @@
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@@ -403,7 +403,7 @@
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@@ -431,7 +431,7 @@
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@@ -444,7 +444,7 @@
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@@ -457,7 +457,7 @@
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@@ -467,7 +467,7 @@
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@@ -480,7 +480,7 @@
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@@ -491,7 +491,7 @@
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@@ -504,7 +504,7 @@
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@@ -514,7 +514,7 @@
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@@ -526,7 +526,7 @@
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+   "id": "68fe93de",
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@@ -538,7 +538,7 @@
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-   "id": "4387cc20",
+   "id": "68cfbf4e",
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@@ -550,7 +550,7 @@
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@@ -561,7 +561,7 @@
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@@ -573,7 +573,7 @@
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@@ -584,7 +584,7 @@
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@@ -597,7 +597,7 @@
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@@ -609,7 +609,7 @@
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@@ -628,7 +628,7 @@
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@@ -640,7 +640,7 @@
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@@ -650,7 +650,7 @@
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@@ -662,7 +662,7 @@
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@@ -672,7 +672,7 @@
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@@ -684,7 +684,7 @@
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@@ -694,7 +694,7 @@
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@@ -706,7 +706,7 @@
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@@ -717,7 +717,7 @@
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-   "id": "64bbcd07",
+   "id": "a6511bdb",
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@@ -755,7 +755,7 @@
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@@ -766,7 +766,7 @@
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@@ -793,7 +793,7 @@
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@@ -809,7 +809,7 @@
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-   "id": "0f1812c0",
+   "id": "dc33ee66",
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@@ -861,7 +861,7 @@
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@@ -872,7 +872,7 @@
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@@ -912,7 +912,7 @@
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@@ -929,7 +929,7 @@
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@@ -941,7 +941,7 @@
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@@ -952,7 +952,7 @@
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@@ -968,7 +968,7 @@
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@@ -979,7 +979,7 @@
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@@ -1016,7 +1016,7 @@
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@@ -1031,7 +1031,7 @@
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@@ -1042,7 +1042,7 @@
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@@ -1058,7 +1058,7 @@
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@@ -1070,7 +1070,7 @@
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@@ -1098,7 +1098,7 @@
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@@ -1111,7 +1111,7 @@
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@@ -1121,7 +1121,7 @@
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@@ -1134,7 +1134,7 @@
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@@ -1167,7 +1167,7 @@
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@@ -1177,7 +1177,7 @@
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@@ -1222,7 +1222,7 @@
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@@ -1281,7 +1281,7 @@
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@@ -1364,7 +1364,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a7f2516c",
+   "id": "f1639865",
    "metadata": {
     "editable": true
    },
@@ -1376,7 +1376,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "5d9cff15",
+   "id": "658d99be",
    "metadata": {
     "editable": true
    },
@@ -1386,7 +1386,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "322ea7fe",
+   "id": "86697e86",
    "metadata": {
     "editable": true
    },
@@ -1398,7 +1398,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "014c4749",
+   "id": "e0d9bd94",
    "metadata": {
     "editable": true
    },
@@ -1408,7 +1408,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "37fe93af",
+   "id": "3a4dcc40",
    "metadata": {
     "editable": true
    },
@@ -1420,7 +1420,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "9616826b",
+   "id": "77837a69",
    "metadata": {
     "editable": true
    },
@@ -1434,7 +1434,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "44bd5d3f",
+   "id": "5818111e",
    "metadata": {
     "editable": true
    },
@@ -1447,7 +1447,7 @@
   {
    "cell_type": "code",
    "execution_count": 5,
-   "id": "de8dbb57",
+   "id": "ceba6339",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1485,7 +1485,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ac30aa2a",
+   "id": "11da1443",
    "metadata": {
     "editable": true
    },
@@ -1496,7 +1496,7 @@
   {
    "cell_type": "code",
    "execution_count": 6,
-   "id": "fdd9da2e",
+   "id": "2dd9be4b",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1536,7 +1536,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "cac155df",
+   "id": "a860a1c8",
    "metadata": {
     "editable": true
    },
@@ -1547,7 +1547,7 @@
   {
    "cell_type": "code",
    "execution_count": 7,
-   "id": "0867e397",
+   "id": "3b12b84a",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -1611,7 +1611,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "19dc6bc2",
+   "id": "0a714917",
    "metadata": {
     "editable": true
    },
@@ -1622,7 +1622,7 @@
   {
    "cell_type": "code",
    "execution_count": 8,
-   "id": "49724718",
+   "id": "d002bbd4",
    "metadata": {
     "collapsed": false,
     "editable": true
diff --git a/doc/pub/week2/pdf/week2.pdf b/doc/pub/week2/pdf/week2.pdf
index 1e66e19d..98aa7ad6 100644
Binary files a/doc/pub/week2/pdf/week2.pdf and b/doc/pub/week2/pdf/week2.pdf differ
diff --git a/doc/src/week2/week2.do.txt b/doc/src/week2/week2.do.txt
index c02c45ba..071e7f5d 100644
--- a/doc/src/week2/week2.do.txt
+++ b/doc/src/week2/week2.do.txt
@@ -1,10 +1,10 @@
-TITLE: Week 5 January 30-February 3, Building a Variational Monte Carlo program 
+TITLE: Week 4 January 22-26, Building a Variational Monte Carlo program 
 AUTHOR: Morten Hjorth-Jensen {copyright, 1999-present|CC BY-NC} Email morten.hjorth-jensen@fys.uio.no at Department of Physics and Center fo Computing in Science Education, University of Oslo, Oslo, Norway & Department of Physics and Astronomy and Facility for Rare Ion Beams, Michigan State University, East Lansing, Michigan, USA
 DATE: January 30-February 3
 
 
 !split
-===== Overview of week 5, january 30-February 3 =====
+===== Overview of week 4, January 22-26 =====
 !bblock  Topics
 * Essential ingredients: Variational Monte Carlo methods, Metropolis Algorithm, statistics and Markov Chain theory
 * How to structure the VMC code
@@ -12,8 +12,8 @@ DATE: January 30-February 3
 
 
 !bblock Teaching Material, videos and written material
-* "Video of lecture":"https://www.youtube.com/watch?v=wUULie1JWk4"
-* "Handwritten notes":"https://github.com/CompPhysics/ComputationalPhysics2/blob/gh-pages/doc/HandWrittenNotes/2023/NotesFebruary2.pdf"
+* "Video of lecture tba":"https://www.youtube.com/"
+* "Handwritten note tbas":"https://github.com/CompPhysics/ComputationalPhysics2/blob/gh-pages/doc/HandWrittenNotes/2024/NotesJanuary26.pdf"
 * See also "Lectures from FYS3150/4150 on the Metropolis Algorithm":"http://compphysics.github.io/ComputationalPhysics/doc/pub/rw/html/rw-bs.html"
 !eblock