book update

doc/LectureNotes/_build/html/chapter6.html

@@ -128,6 +128,11 @@
    1. Elements of Probability Theory and Statistical Data Analysis
   </a>
  </li>
+ <li class="toctree-l1">
+  <a class="reference internal" href="linalg.html">
+   2. Linear Algebra, Handling of Arrays and more Python Features
+  </a>
+ </li>
 </ul>
 <p class="caption collapsible-parent">
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@@ -206,6 +211,11 @@
    2. Building a Feed Forward Neural Network
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+ <li class="toctree-l1">
+  <a class="reference internal" href="chapter11.html">
+   3. Solving Differential Equations  with Deep Learning
+  </a>
+ </li>
 </ul>
 
 </nav> <!-- To handle the deprecated key -->
@@ -536,9 +546,9 @@ predicting the target features of query instances is as follows:</p>
 </div>
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 <div class="output stream highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>2nd degree coefficients:
-zero power:  -0.9578173338515308
-first power:  -0.06900718352507469
-second power:  0.0001745458342080017
+zero power:  1.3961181500194275
+first power:  -0.0007183308296987448
+second power:  0.0002882855342275337
 </pre></div>
 </div>
 <img alt="_images/chapter6_1_1.png" src="_images/chapter6_1_1.png" />