diff --git a/doc/pub/week39/html/week39-reveal.html b/doc/pub/week39/html/week39-reveal.html
index 981e59452..ae577fb47 100644
--- a/doc/pub/week39/html/week39-reveal.html
+++ b/doc/pub/week39/html/week39-reveal.html
@@ -3770,7 +3770,7 @@ derivative_fn = grad(sum_logistic)
 <h2 id="weekend-challenge">Weekend challenge </h2>
 
 <ul>
-<p><li> Try to run the above codes and implement the stochastic gradient descent with RMSprop and ADAM.</li>
+<p><li> Try to run the above codes and implement the stochastic gradient descent with the ADAM. Here you can use as examples the Adagrad and the RMSprop algorithms.</li>
 <p><li> Add a more complicated function and study the rate of convergence for the derivatives as function of the different methods</li>
 <p><li> Extend from linear regression to logistic regression.</li>
 </ul>
diff --git a/doc/pub/week39/html/week39-solarized.html b/doc/pub/week39/html/week39-solarized.html
index 413df7668..556a9c60a 100644
--- a/doc/pub/week39/html/week39-solarized.html
+++ b/doc/pub/week39/html/week39-solarized.html
@@ -3705,7 +3705,7 @@ derivative_fn = grad(sum_logistic)
 <h2 id="weekend-challenge">Weekend challenge </h2>
 
 <ul>
-<li> Try to run the above codes and implement the stochastic gradient descent with RMSprop and ADAM.</li>
+<li> Try to run the above codes and implement the stochastic gradient descent with the ADAM. Here you can use as examples the Adagrad and the RMSprop algorithms.</li>
 <li> Add a more complicated function and study the rate of convergence for the derivatives as function of the different methods</li>
 <li> Extend from linear regression to logistic regression.</li>
 </ul>
diff --git a/doc/pub/week39/html/week39.html b/doc/pub/week39/html/week39.html
index d3a763cce..1726ce3a1 100644
--- a/doc/pub/week39/html/week39.html
+++ b/doc/pub/week39/html/week39.html
@@ -3782,7 +3782,7 @@ derivative_fn <span style="color: #666666">=</span> grad(sum_logistic)
 <h2 id="weekend-challenge">Weekend challenge </h2>
 
 <ul>
-<li> Try to run the above codes and implement the stochastic gradient descent with RMSprop and ADAM.</li>
+<li> Try to run the above codes and implement the stochastic gradient descent with the ADAM. Here you can use as examples the Adagrad and the RMSprop algorithms.</li>
 <li> Add a more complicated function and study the rate of convergence for the derivatives as function of the different methods</li>
 <li> Extend from linear regression to logistic regression.</li>
 </ul>
diff --git a/doc/pub/week39/ipynb/ipynb-week39-src.tar.gz b/doc/pub/week39/ipynb/ipynb-week39-src.tar.gz
index 9637528b3..cc0f2e08e 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 c993ceaf5..a4cfff437 100644
--- a/doc/pub/week39/ipynb/week39.ipynb
+++ b/doc/pub/week39/ipynb/week39.ipynb
@@ -2,7 +2,7 @@
  "cells": [
   {
    "cell_type": "markdown",
-   "id": "f5eeed58",
+   "id": "9b7db121",
    "metadata": {
     "editable": true
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@@ -14,7 +14,7 @@
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-   "id": "041e3d30",
+   "id": "f1671d88",
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@@ -29,7 +29,7 @@
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-   "id": "df619ba6",
+   "id": "d8fe7be9",
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@@ -55,7 +55,7 @@
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+   "id": "bb4365c9",
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@@ -76,7 +76,7 @@
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-   "id": "ff350bb2",
+   "id": "426ca5ed",
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@@ -93,7 +93,7 @@
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-   "id": "959e1599",
+   "id": "b42f8fa9",
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@@ -108,7 +108,7 @@
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@@ -118,7 +118,7 @@
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-   "id": "1542dbf4",
+   "id": "308a0e16",
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@@ -134,7 +134,7 @@
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+   "id": "c31bc92a",
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@@ -146,7 +146,7 @@
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@@ -157,7 +157,7 @@
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-   "id": "43872b1a",
+   "id": "89c7fb27",
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@@ -169,7 +169,7 @@
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+   "id": "88cafcf5",
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@@ -179,7 +179,7 @@
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-   "id": "b085449f",
+   "id": "b6fd7c9c",
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     "editable": true
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@@ -193,7 +193,7 @@
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+   "id": "2669fb99",
    "metadata": {
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@@ -205,7 +205,7 @@
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+   "id": "70518a94",
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@@ -215,7 +215,7 @@
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@@ -227,7 +227,7 @@
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+   "id": "5c8b6f2f",
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@@ -239,7 +239,7 @@
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+   "id": "95636683",
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@@ -259,7 +259,7 @@
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-   "id": "4f129fed",
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@@ -275,7 +275,7 @@
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@@ -291,7 +291,7 @@
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-   "id": "3bb0a4c7",
+   "id": "20900d60",
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@@ -302,7 +302,7 @@
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+   "id": "3c036156",
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@@ -314,7 +314,7 @@
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+   "id": "bffe992a",
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@@ -324,7 +324,7 @@
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@@ -336,7 +336,7 @@
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@@ -346,7 +346,7 @@
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@@ -358,7 +358,7 @@
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+   "id": "0881b8b3",
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@@ -380,7 +380,7 @@
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-   "id": "3bda01dd",
+   "id": "c79f5156",
    "metadata": {
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@@ -393,7 +393,7 @@
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    "cell_type": "markdown",
-   "id": "09af289b",
+   "id": "fdb0735d",
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@@ -406,7 +406,7 @@
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@@ -416,7 +416,7 @@
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+   "id": "9842f857",
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@@ -434,7 +434,7 @@
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+   "id": "efb235b9",
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@@ -444,7 +444,7 @@
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@@ -459,7 +459,7 @@
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@@ -469,7 +469,7 @@
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+   "id": "bbfb119f",
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@@ -483,7 +483,7 @@
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@@ -493,7 +493,7 @@
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@@ -507,7 +507,7 @@
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@@ -522,7 +522,7 @@
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@@ -539,7 +539,7 @@
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@@ -551,7 +551,7 @@
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@@ -565,7 +565,7 @@
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@@ -580,7 +580,7 @@
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@@ -592,7 +592,7 @@
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@@ -603,7 +603,7 @@
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@@ -631,7 +631,7 @@
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@@ -653,7 +653,7 @@
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@@ -675,7 +675,7 @@
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@@ -687,7 +687,7 @@
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@@ -724,7 +724,7 @@
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@@ -752,7 +752,7 @@
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@@ -782,7 +782,7 @@
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@@ -802,7 +802,7 @@
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@@ -814,7 +814,7 @@
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@@ -824,7 +824,7 @@
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@@ -836,7 +836,7 @@
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+   "id": "c1616654",
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@@ -848,7 +848,7 @@
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@@ -860,7 +860,7 @@
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@@ -872,7 +872,7 @@
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@@ -883,7 +883,7 @@
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@@ -896,7 +896,7 @@
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@@ -908,7 +908,7 @@
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@@ -918,7 +918,7 @@
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@@ -930,7 +930,7 @@
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@@ -940,7 +940,7 @@
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@@ -951,7 +951,7 @@
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@@ -963,7 +963,7 @@
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@@ -975,7 +975,7 @@
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@@ -987,7 +987,7 @@
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@@ -998,7 +998,7 @@
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@@ -1009,7 +1009,7 @@
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@@ -1021,7 +1021,7 @@
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@@ -1031,7 +1031,7 @@
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@@ -1043,7 +1043,7 @@
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@@ -1053,7 +1053,7 @@
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@@ -1065,7 +1065,7 @@
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@@ -1075,7 +1075,7 @@
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@@ -1087,7 +1087,7 @@
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@@ -1097,7 +1097,7 @@
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@@ -1109,7 +1109,7 @@
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@@ -1120,7 +1120,7 @@
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@@ -1153,7 +1153,7 @@
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@@ -1164,7 +1164,7 @@
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@@ -1178,7 +1178,7 @@
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@@ -1189,7 +1189,7 @@
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@@ -1202,7 +1202,7 @@
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@@ -1213,7 +1213,7 @@
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@@ -1231,7 +1231,7 @@
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@@ -1242,7 +1242,7 @@
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@@ -1257,7 +1257,7 @@
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@@ -1267,7 +1267,7 @@
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@@ -1281,7 +1281,7 @@
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@@ -1293,7 +1293,7 @@
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@@ -1304,7 +1304,7 @@
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@@ -1316,7 +1316,7 @@
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@@ -1327,7 +1327,7 @@
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@@ -1338,7 +1338,7 @@
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@@ -1350,7 +1350,7 @@
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@@ -1360,7 +1360,7 @@
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@@ -1372,7 +1372,7 @@
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@@ -1384,7 +1384,7 @@
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@@ -1396,7 +1396,7 @@
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@@ -1408,7 +1408,7 @@
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@@ -1419,7 +1419,7 @@
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@@ -1431,7 +1431,7 @@
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@@ -1441,7 +1441,7 @@
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@@ -1453,7 +1453,7 @@
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@@ -1463,7 +1463,7 @@
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@@ -1475,7 +1475,7 @@
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@@ -1495,7 +1495,7 @@
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@@ -1507,7 +1507,7 @@
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@@ -1517,7 +1517,7 @@
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@@ -1529,7 +1529,7 @@
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@@ -1539,7 +1539,7 @@
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@@ -1550,7 +1550,7 @@
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@@ -1562,7 +1562,7 @@
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@@ -1574,7 +1574,7 @@
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@@ -1586,7 +1586,7 @@
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@@ -1599,7 +1599,7 @@
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@@ -1610,7 +1610,7 @@
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@@ -1622,7 +1622,7 @@
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@@ -1638,7 +1638,7 @@
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@@ -1650,7 +1650,7 @@
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@@ -1661,7 +1661,7 @@
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@@ -1673,7 +1673,7 @@
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@@ -1683,7 +1683,7 @@
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@@ -1695,7 +1695,7 @@
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@@ -1705,7 +1705,7 @@
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@@ -1717,7 +1717,7 @@
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@@ -1727,7 +1727,7 @@
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@@ -1739,7 +1739,7 @@
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@@ -1763,7 +1763,7 @@
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@@ -1776,7 +1776,7 @@
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@@ -1787,7 +1787,7 @@
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@@ -1799,7 +1799,7 @@
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@@ -1809,7 +1809,7 @@
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@@ -1821,7 +1821,7 @@
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@@ -1835,7 +1835,7 @@
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@@ -1851,7 +1851,7 @@
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@@ -1861,7 +1861,7 @@
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@@ -1873,7 +1873,7 @@
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@@ -1883,7 +1883,7 @@
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@@ -1895,7 +1895,7 @@
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@@ -1909,7 +1909,7 @@
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@@ -1919,7 +1919,7 @@
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@@ -1930,7 +1930,7 @@
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@@ -1945,7 +1945,7 @@
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@@ -1955,7 +1955,7 @@
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@@ -1967,7 +1967,7 @@
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@@ -1979,7 +1979,7 @@
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@@ -1994,7 +1994,7 @@
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@@ -2007,7 +2007,7 @@
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@@ -2064,7 +2064,7 @@
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@@ -2075,7 +2075,7 @@
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@@ -2102,7 +2102,7 @@
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@@ -2114,7 +2114,7 @@
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@@ -2126,7 +2126,7 @@
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@@ -2136,7 +2136,7 @@
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@@ -2150,7 +2150,7 @@
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@@ -2160,7 +2160,7 @@
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@@ -2172,7 +2172,7 @@
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@@ -2183,7 +2183,7 @@
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@@ -2198,7 +2198,7 @@
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@@ -2212,7 +2212,7 @@
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@@ -2223,7 +2223,7 @@
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@@ -2284,7 +2284,7 @@
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@@ -2306,7 +2306,7 @@
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@@ -2319,7 +2319,7 @@
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@@ -2385,7 +2385,7 @@
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@@ -2396,7 +2396,7 @@
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@@ -2470,7 +2470,7 @@
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@@ -2482,7 +2482,7 @@
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@@ -2503,7 +2503,7 @@
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@@ -2535,7 +2535,7 @@
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@@ -2552,7 +2552,7 @@
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@@ -2565,7 +2565,7 @@
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@@ -2578,7 +2578,7 @@
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@@ -2591,7 +2591,7 @@
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@@ -2605,7 +2605,7 @@
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@@ -2627,7 +2627,7 @@
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@@ -2642,7 +2642,7 @@
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@@ -2654,7 +2654,7 @@
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@@ -2667,7 +2667,7 @@
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@@ -2681,7 +2681,7 @@
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@@ -2692,7 +2692,7 @@
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@@ -2717,7 +2717,7 @@
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@@ -2733,7 +2733,7 @@
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@@ -2754,7 +2754,7 @@
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@@ -2774,7 +2774,7 @@
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@@ -2793,7 +2793,7 @@
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@@ -2828,7 +2828,7 @@
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@@ -2841,7 +2841,7 @@
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-   "id": "ddba2679",
+   "id": "8f62bd25",
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@@ -2918,7 +2918,7 @@
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   {
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@@ -2933,7 +2933,7 @@
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   {
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+   "id": "4d00735a",
    "metadata": {
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@@ -2948,7 +2948,7 @@
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   {
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@@ -2960,7 +2960,7 @@
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   {
    "cell_type": "markdown",
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@@ -2978,7 +2978,7 @@
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   {
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@@ -2997,7 +2997,7 @@
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   {
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@@ -3009,7 +3009,7 @@
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   {
    "cell_type": "markdown",
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+   "id": "ec1cbddf",
    "metadata": {
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@@ -3019,7 +3019,7 @@
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   {
    "cell_type": "markdown",
-   "id": "19ae1341",
+   "id": "77134c29",
    "metadata": {
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@@ -3035,7 +3035,7 @@
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   {
    "cell_type": "markdown",
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@@ -3047,7 +3047,7 @@
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   {
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+   "id": "73157461",
    "metadata": {
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@@ -3057,7 +3057,7 @@
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   {
    "cell_type": "markdown",
-   "id": "6ebfbe1c",
+   "id": "5d7111b3",
    "metadata": {
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@@ -3069,7 +3069,7 @@
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   {
    "cell_type": "markdown",
-   "id": "7c62d8c5",
+   "id": "8962fb88",
    "metadata": {
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@@ -3079,7 +3079,7 @@
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   {
    "cell_type": "markdown",
-   "id": "c3998019",
+   "id": "c37e8563",
    "metadata": {
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@@ -3091,7 +3091,7 @@
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   {
    "cell_type": "markdown",
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+   "id": "9d59ea2e",
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@@ -3107,7 +3107,7 @@
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   {
    "cell_type": "markdown",
-   "id": "566451ea",
+   "id": "0d015b64",
    "metadata": {
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@@ -3119,7 +3119,7 @@
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   {
    "cell_type": "markdown",
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+   "id": "eef52144",
    "metadata": {
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@@ -3152,7 +3152,7 @@
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   {
    "cell_type": "markdown",
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+   "id": "b973698a",
    "metadata": {
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@@ -3164,7 +3164,7 @@
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   {
    "cell_type": "markdown",
-   "id": "3f44d0b4",
+   "id": "698130a6",
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@@ -3182,7 +3182,7 @@
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   {
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@@ -3192,7 +3192,7 @@
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   {
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@@ -3223,7 +3223,7 @@
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   {
    "cell_type": "markdown",
-   "id": "c79841ef",
+   "id": "01000999",
    "metadata": {
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@@ -3238,7 +3238,7 @@
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   {
    "cell_type": "markdown",
-   "id": "1385d44b",
+   "id": "f2f20692",
    "metadata": {
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@@ -3256,7 +3256,7 @@
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   {
    "cell_type": "markdown",
-   "id": "abbf8209",
+   "id": "4e2b4bd1",
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@@ -3268,7 +3268,7 @@
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   {
    "cell_type": "markdown",
-   "id": "3455b657",
+   "id": "83c5eab2",
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@@ -3280,7 +3280,7 @@
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   {
    "cell_type": "markdown",
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+   "id": "40ef84a6",
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@@ -3298,7 +3298,7 @@
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   {
    "cell_type": "markdown",
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+   "id": "d8dcef44",
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@@ -3327,7 +3327,7 @@
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   {
    "cell_type": "markdown",
-   "id": "eb3a50c2",
+   "id": "073a3253",
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@@ -3345,7 +3345,7 @@
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   {
    "cell_type": "markdown",
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+   "id": "10c9590c",
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@@ -3357,7 +3357,7 @@
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   {
    "cell_type": "markdown",
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+   "id": "c90b6aaf",
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@@ -3369,7 +3369,7 @@
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   {
    "cell_type": "markdown",
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+   "id": "b5c003bb",
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@@ -3381,7 +3381,7 @@
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   {
    "cell_type": "markdown",
-   "id": "9e590482",
+   "id": "9527a589",
    "metadata": {
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@@ -3393,7 +3393,7 @@
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   {
    "cell_type": "markdown",
-   "id": "22660f5e",
+   "id": "b7d1a178",
    "metadata": {
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@@ -3405,7 +3405,7 @@
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   {
    "cell_type": "markdown",
-   "id": "6cf31f55",
+   "id": "0423c3eb",
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@@ -3422,7 +3422,7 @@
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   {
    "cell_type": "markdown",
-   "id": "38eb2a6a",
+   "id": "4db72a8e",
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@@ -3441,7 +3441,7 @@
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   {
    "cell_type": "markdown",
-   "id": "a9f1a129",
+   "id": "197b823d",
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@@ -3453,7 +3453,7 @@
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   {
    "cell_type": "markdown",
-   "id": "15bb1241",
+   "id": "3c07201a",
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@@ -3467,7 +3467,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7977bb32",
+   "id": "a676af2a",
    "metadata": {
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@@ -3487,7 +3487,7 @@
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   {
    "cell_type": "markdown",
-   "id": "25684316",
+   "id": "5d437b79",
    "metadata": {
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@@ -3525,7 +3525,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "0acff299",
+   "id": "7997afc7",
    "metadata": {
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@@ -3537,7 +3537,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "363cba19",
+   "id": "79f772bc",
    "metadata": {
     "editable": true
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@@ -3547,7 +3547,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "d0e2eecb",
+   "id": "068fa7f3",
    "metadata": {
     "editable": true
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@@ -3559,7 +3559,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "057f24ca",
+   "id": "c77feb11",
    "metadata": {
     "editable": true
    },
@@ -3570,7 +3570,7 @@
   {
    "cell_type": "code",
    "execution_count": 15,
-   "id": "1f7c200a",
+   "id": "2134397b",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3615,7 +3615,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7a951fec",
+   "id": "e271876e",
    "metadata": {
     "editable": true
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@@ -3632,7 +3632,7 @@
   {
    "cell_type": "code",
    "execution_count": 16,
-   "id": "d6182b53",
+   "id": "a9bc2740",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3660,7 +3660,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "09ae2932",
+   "id": "8b3edc43",
    "metadata": {
     "editable": true
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@@ -3675,7 +3675,7 @@
   {
    "cell_type": "code",
    "execution_count": 17,
-   "id": "97d76ab7",
+   "id": "d205e7eb",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3719,7 +3719,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "25e997f8",
+   "id": "a2f9d1cc",
    "metadata": {
     "editable": true
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@@ -3729,7 +3729,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c0317908",
+   "id": "77a185bb",
    "metadata": {
     "editable": true
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@@ -3740,7 +3740,7 @@
   {
    "cell_type": "code",
    "execution_count": 18,
-   "id": "9c31e5e4",
+   "id": "1c4a4d77",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3768,7 +3768,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "48d62537",
+   "id": "739eae4d",
    "metadata": {
     "editable": true
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@@ -3783,7 +3783,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "833b1c88",
+   "id": "6f4276ea",
    "metadata": {
     "editable": true
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@@ -3794,7 +3794,7 @@
   {
    "cell_type": "code",
    "execution_count": 19,
-   "id": "67c295c6",
+   "id": "aa1c1e62",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3822,7 +3822,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "2dd6483a",
+   "id": "661c9456",
    "metadata": {
     "editable": true
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@@ -3833,7 +3833,7 @@
   {
    "cell_type": "code",
    "execution_count": 20,
-   "id": "ce65e6e4",
+   "id": "f4538a03",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3858,7 +3858,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "299a9b1d",
+   "id": "3a2398ef",
    "metadata": {
     "editable": true
    },
@@ -3869,7 +3869,7 @@
   {
    "cell_type": "code",
    "execution_count": 21,
-   "id": "e0ce00ec",
+   "id": "2c98ad0b",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3905,7 +3905,7 @@
   {
    "cell_type": "code",
    "execution_count": 22,
-   "id": "29b82fe4",
+   "id": "02c3d631",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3925,7 +3925,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "5ab98e85",
+   "id": "71bb1f87",
    "metadata": {
     "editable": true
    },
@@ -3936,7 +3936,7 @@
   {
    "cell_type": "code",
    "execution_count": 23,
-   "id": "5ec23bfc",
+   "id": "4aaeea32",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -3974,7 +3974,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "f224a5ba",
+   "id": "ae549235",
    "metadata": {
     "editable": true
    },
@@ -3984,7 +3984,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4fc0e83e",
+   "id": "4a9b3bf5",
    "metadata": {
     "editable": true
    },
@@ -3998,7 +3998,7 @@
   {
    "cell_type": "code",
    "execution_count": 24,
-   "id": "ee9c6265",
+   "id": "36fb2a7e",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -4020,7 +4020,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "0f42fe39",
+   "id": "de241d13",
    "metadata": {
     "editable": true
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@@ -4030,7 +4030,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "59eb26f6",
+   "id": "396b2523",
    "metadata": {
     "editable": true
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@@ -4041,7 +4041,7 @@
   {
    "cell_type": "code",
    "execution_count": 25,
-   "id": "7fad7b56",
+   "id": "6de53da2",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -4063,7 +4063,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "74dc67b1",
+   "id": "6f4d7c50",
    "metadata": {
     "editable": true
    },
@@ -4076,7 +4076,7 @@
   {
    "cell_type": "code",
    "execution_count": 26,
-   "id": "cb4cd73b",
+   "id": "bccf2c33",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -4101,7 +4101,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "4306ba8f",
+   "id": "0c75b991",
    "metadata": {
     "editable": true
    },
@@ -4113,7 +4113,7 @@
   {
    "cell_type": "code",
    "execution_count": 27,
-   "id": "53112d0a",
+   "id": "33d78552",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -4128,7 +4128,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "22f27155",
+   "id": "ace05b46",
    "metadata": {
     "editable": true
    },
@@ -4143,7 +4143,7 @@
   {
    "cell_type": "code",
    "execution_count": 28,
-   "id": "21cc23e7",
+   "id": "96581910",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -4203,7 +4203,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "72d7044f",
+   "id": "c8917005",
    "metadata": {
     "editable": true
    },
@@ -4214,7 +4214,7 @@
   {
    "cell_type": "code",
    "execution_count": 29,
-   "id": "7738f520",
+   "id": "8cdf3bb8",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -4278,7 +4278,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "2917b811",
+   "id": "29cd040f",
    "metadata": {
     "editable": true
    },
@@ -4289,7 +4289,7 @@
   {
    "cell_type": "code",
    "execution_count": 30,
-   "id": "e8e2bcc8",
+   "id": "e24e4dff",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -4338,7 +4338,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "33af042d",
+   "id": "7c4cabd0",
    "metadata": {
     "editable": true
    },
@@ -4350,7 +4350,7 @@
   {
    "cell_type": "code",
    "execution_count": 31,
-   "id": "d39fd015",
+   "id": "ac8d1b74",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -4434,7 +4434,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "ad76fab7",
+   "id": "8daddbbb",
    "metadata": {
     "editable": true
    },
@@ -4445,7 +4445,7 @@
   {
    "cell_type": "code",
    "execution_count": 32,
-   "id": "c93f7f15",
+   "id": "f98d1a25",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -4523,7 +4523,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "0a079dcb",
+   "id": "c679233f",
    "metadata": {
     "editable": true
    },
@@ -4534,7 +4534,7 @@
   {
    "cell_type": "code",
    "execution_count": 33,
-   "id": "d3891f6b",
+   "id": "94c2d690",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -4598,7 +4598,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "e97f18ba",
+   "id": "df4e327b",
    "metadata": {
     "editable": true
    },
@@ -4608,7 +4608,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "66f93128",
+   "id": "d132564e",
    "metadata": {
     "editable": true
    },
@@ -4619,7 +4619,7 @@
   {
    "cell_type": "code",
    "execution_count": 34,
-   "id": "f001dd7d",
+   "id": "f2143c85",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -4688,7 +4688,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "c4fcfa2e",
+   "id": "3a32a369",
    "metadata": {
     "editable": true
    },
@@ -4699,7 +4699,7 @@
   {
    "cell_type": "code",
    "execution_count": 35,
-   "id": "2655ba09",
+   "id": "401cfd7e",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -4743,7 +4743,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "77682985",
+   "id": "c1ebe2a0",
    "metadata": {
     "editable": true
    },
@@ -4762,7 +4762,7 @@
   {
    "cell_type": "code",
    "execution_count": 36,
-   "id": "76ee1c4b",
+   "id": "f0f9a51c",
    "metadata": {
     "collapsed": false,
     "editable": true
@@ -4782,14 +4782,14 @@
   },
   {
    "cell_type": "markdown",
-   "id": "a00f85da",
+   "id": "cb8bbc4e",
    "metadata": {
     "editable": true
    },
    "source": [
     "## Weekend challenge\n",
     "\n",
-    "* Try to run the above codes and implement the stochastic gradient descent with RMSprop and ADAM.\n",
+    "* Try to run the above codes and implement the stochastic gradient descent with the ADAM. Here you can use as examples the Adagrad and the RMSprop algorithms.\n",
     "\n",
     "* Add a more complicated function and study the rate of convergence for the derivatives as function of the different methods\n",
     "\n",
diff --git a/doc/src/week39/week39.do.txt b/doc/src/week39/week39.do.txt
index 4b4d5c9aa..97c5fa7ea 100644
--- a/doc/src/week39/week39.do.txt
+++ b/doc/src/week39/week39.do.txt
@@ -2633,6 +2633,6 @@ print(derivative_fn(x_small))
 !split
 ===== Weekend challenge =====
 
-* Try to run the above codes and implement the stochastic gradient descent with RMSprop and ADAM.
+* Try to run the above codes and implement the stochastic gradient descent with the ADAM. Here you can use as examples the Adagrad and the RMSprop algorithms.
 * Add a more complicated function and study the rate of convergence for the derivatives as function of the different methods
 * Extend from linear regression to logistic regression.