diff --git a/doc/pub/week46/html/._week46-bs000.html b/doc/pub/week46/html/._week46-bs000.html
index 3f75fff30..7ee4f918d 100644
--- a/doc/pub/week46/html/._week46-bs000.html
+++ b/doc/pub/week46/html/._week46-bs000.html
@@ -178,7 +178,7 @@ MathJax.Hub.Config({
 <center>[2] <b>Department of Physics and Astronomy and National Superconducting Cyclotron Laboratory, Michigan State University</b></center>
 <br>
 <p>
-<center><h4>Nov 9, 2020</h4></center> <!-- date -->
+<center><h4>Nov 11, 2020</h4></center> <!-- date -->
 <br>
 <p>
 
diff --git a/doc/pub/week46/html/._week46-bs001.html b/doc/pub/week46/html/._week46-bs001.html
index f3a79a03d..7f2f4c592 100644
--- a/doc/pub/week46/html/._week46-bs001.html
+++ b/doc/pub/week46/html/._week46-bs001.html
@@ -162,7 +162,7 @@ MathJax.Hub.Config({
 <h2 id="___sec0" class="anchor">Overview of week 46 </h2>
 
 <ul>
-<li> <b>Thursday</b>: Summary of Gradient Boosting and further examples of applications, from the physical sciences to the social sciences.</li>
+<li> <b>Thursday</b>: Summary of Gradient Boosting and further examples of applications, from the physical sciences to the social sciences. <a href="https://www.mn.uio.no/fysikk/english/people/johnmai/" target="_self">Guest lecture by John M. Aiken on Gradient Boosting and XGboost</a>.</li>
 <li> <b>Friday</b>: Support Vector Machines, classification and regression.</li>
 </ul>
 
diff --git a/doc/pub/week46/html/week46-bs.html b/doc/pub/week46/html/week46-bs.html
index 3f75fff30..7ee4f918d 100644
--- a/doc/pub/week46/html/week46-bs.html
+++ b/doc/pub/week46/html/week46-bs.html
@@ -178,7 +178,7 @@ MathJax.Hub.Config({
 <center>[2] <b>Department of Physics and Astronomy and National Superconducting Cyclotron Laboratory, Michigan State University</b></center>
 <br>
 <p>
-<center><h4>Nov 9, 2020</h4></center> <!-- date -->
+<center><h4>Nov 11, 2020</h4></center> <!-- date -->
 <br>
 <p>
 
diff --git a/doc/pub/week46/html/week46-reveal.html b/doc/pub/week46/html/week46-reveal.html
index 06d8467ab..c83bc9af7 100644
--- a/doc/pub/week46/html/week46-reveal.html
+++ b/doc/pub/week46/html/week46-reveal.html
@@ -148,7 +148,7 @@ MathJax.Hub.Config({
 <center>[2] <b>Department of Physics and Astronomy and National Superconducting Cyclotron Laboratory, Michigan State University</b></center>
 <br>
 <p>&nbsp;<br>
-<center><h4>Nov 9, 2020</h4></center> <!-- date -->
+<center><h4>Nov 11, 2020</h4></center> <!-- date -->
 <br>
 <p>
 
@@ -162,7 +162,7 @@ MathJax.Hub.Config({
 <h2 id="___sec0">Overview of week 46 </h2>
 
 <ul>
-<p><li> <b>Thursday</b>: Summary of Gradient Boosting and further examples of applications, from the physical sciences to the social sciences.</li>
+<p><li> <b>Thursday</b>: Summary of Gradient Boosting and further examples of applications, from the physical sciences to the social sciences. <a href="https://www.mn.uio.no/fysikk/english/people/johnmai/" target="_blank">Guest lecture by John M. Aiken on Gradient Boosting and XGboost</a>.</li>
 <p><li> <b>Friday</b>: Support Vector Machines, classification and regression.</li>
 </ul>
 <p>
diff --git a/doc/pub/week46/html/week46-solarized.html b/doc/pub/week46/html/week46-solarized.html
index d07214093..f1e2fe58f 100644
--- a/doc/pub/week46/html/week46-solarized.html
+++ b/doc/pub/week46/html/week46-solarized.html
@@ -112,7 +112,7 @@ MathJax.Hub.Config({
 <center>[2] <b>Department of Physics and Astronomy and National Superconducting Cyclotron Laboratory, Michigan State University</b></center>
 <br>
 <p>
-<center><h4>Nov 9, 2020</h4></center> <!-- date -->
+<center><h4>Nov 11, 2020</h4></center> <!-- date -->
 <br>
 <p>
 <!-- !split --><br><br><br><br><br><br><br><br><br><br>
@@ -120,7 +120,7 @@ MathJax.Hub.Config({
 <h2 id="___sec0">Overview of week 46 </h2>
 
 <ul>
-<li> <b>Thursday</b>: Summary of Gradient Boosting and further examples of applications, from the physical sciences to the social sciences.</li>
+<li> <b>Thursday</b>: Summary of Gradient Boosting and further examples of applications, from the physical sciences to the social sciences. <a href="https://www.mn.uio.no/fysikk/english/people/johnmai/" target="_blank">Guest lecture by John M. Aiken on Gradient Boosting and XGboost</a>.</li>
 <li> <b>Friday</b>: Support Vector Machines, classification and regression.</li>
 </ul>
 
diff --git a/doc/pub/week46/html/week46.html b/doc/pub/week46/html/week46.html
index 6ed02043a..3292c09a8 100644
--- a/doc/pub/week46/html/week46.html
+++ b/doc/pub/week46/html/week46.html
@@ -117,7 +117,7 @@ MathJax.Hub.Config({
 <center>[2] <b>Department of Physics and Astronomy and National Superconducting Cyclotron Laboratory, Michigan State University</b></center>
 <br>
 <p>
-<center><h4>Nov 9, 2020</h4></center> <!-- date -->
+<center><h4>Nov 11, 2020</h4></center> <!-- date -->
 <br>
 <p>
 <!-- !split --><br><br><br><br><br><br><br><br><br><br>
@@ -125,7 +125,7 @@ MathJax.Hub.Config({
 <h2 id="___sec0">Overview of week 46 </h2>
 
 <ul>
-<li> <b>Thursday</b>: Summary of Gradient Boosting and further examples of applications, from the physical sciences to the social sciences.</li>
+<li> <b>Thursday</b>: Summary of Gradient Boosting and further examples of applications, from the physical sciences to the social sciences. <a href="https://www.mn.uio.no/fysikk/english/people/johnmai/" target="_blank">Guest lecture by John M. Aiken on Gradient Boosting and XGboost</a>.</li>
 <li> <b>Friday</b>: Support Vector Machines, classification and regression.</li>
 </ul>
 
diff --git a/doc/pub/week46/ipynb/ipynb-week46-src.tar.gz b/doc/pub/week46/ipynb/ipynb-week46-src.tar.gz
index 8c8096a12..1cb6515a3 100644
Binary files a/doc/pub/week46/ipynb/ipynb-week46-src.tar.gz and b/doc/pub/week46/ipynb/ipynb-week46-src.tar.gz differ
diff --git a/doc/pub/week46/ipynb/week46.ipynb b/doc/pub/week46/ipynb/week46.ipynb
index f226dd798..14dccd760 100644
--- a/doc/pub/week46/ipynb/week46.ipynb
+++ b/doc/pub/week46/ipynb/week46.ipynb
@@ -10,7 +10,7 @@
     "<!-- Author: -->  \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: **Nov 9, 2020**\n",
+    "Date: **Nov 11, 2020**\n",
     "\n",
     "Copyright 1999-2020, Morten Hjorth-Jensen. Released under CC Attribution-NonCommercial 4.0 license\n",
     "\n",
@@ -18,7 +18,7 @@
     "\n",
     "## Overview of week 46\n",
     "\n",
-    "* **Thursday**: Summary of Gradient Boosting and further examples of applications, from the physical sciences to the social sciences.\n",
+    "* **Thursday**: Summary of Gradient Boosting and further examples of applications, from the physical sciences to the social sciences. [Guest lecture by John M. Aiken on Gradient Boosting and XGboost](https://www.mn.uio.no/fysikk/english/people/johnmai/).\n",
     "\n",
     "* **Friday**: Support Vector Machines, classification and regression.\n",
     "\n",
diff --git a/doc/src/week46/week46.do.txt b/doc/src/week46/week46.do.txt
index 7a77bf35f..e4b944d6c 100644
--- a/doc/src/week46/week46.do.txt
+++ b/doc/src/week46/week46.do.txt
@@ -5,7 +5,7 @@ DATE: today
 !split
 ===== Overview of week 46 =====
 
-* _Thursday_: Summary of Gradient Boosting and further examples of applications, from the physical sciences to the social sciences.
+* _Thursday_: Summary of Gradient Boosting and further examples of applications, from the physical sciences to the social sciences. "Guest lecture by John M. Aiken on Gradient Boosting and XGboost":"https://www.mn.uio.no/fysikk/english/people/johnmai/".
 * _Friday_: Support Vector Machines, classification and regression.