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diff --git a/DG/elliptic.html b/DG/elliptic.html
diff --git a/DG/elliptic_stdDG.html b/DG/elliptic_stdDG.html
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-    <title>Splitting Methods for the time-dependent convection diffusion equation &#8212; Introduction to Scientific Computing</title>
+    <title>16. Splitting Methods for the time-dependent convection diffusion equation &#8212; Introduction to Scientific Computing</title>
 
 
 
@@ -32,7 +32,7 @@
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@@ -62,6 +62,8 @@
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@@ -123,8 +125,6 @@
 
 
 
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@@ -174,7 +174,7 @@
         <ul class="nav bd-sidenav bd-sidenav__home-link">
             <li class="toctree-l1">
                 <a class="reference internal" href="../intro.html">
-                    Introduction to Scientific Computing
+                    An Interactive Introduction to the Finite Element Method
                 </a>
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         </ul>
@@ -184,6 +184,38 @@
 <li class="toctree-l1"><a class="reference internal" href="../primal/boundary_conditions.html">2. Boundary Conditions</a></li>
 <li class="toctree-l1"><a class="reference internal" href="../primal/subdomains.html">3. Variable Coefficients</a></li>
 <li class="toctree-l1"><a class="reference internal" href="../primal/solvers.html">4. Iterative Solvers</a></li>
+</ul>
+<p aria-level="2" class="caption" role="heading"><span class="caption-text">Mixed Finite Element Methods</span></p>
+<ul class="nav bd-sidenav">
+<li class="toctree-l1"><a class="reference internal" href="../mixed/stokes.html">5. Stokes Equation</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../mixed/boundary.html">6. Boundary Conditions</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../mixed/secondorder.html">7. Mixed Methods for second order equations</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../mixed/abstract.html">8. Abstract Theory</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../mixed/abstractfem.html">9. Abstract theory for mixed finite element methods</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../mixed/pardep.html">10. Parameter Dependent Problems</a></li>
+</ul>
+<p aria-level="2" class="caption" role="heading"><span class="caption-text">Discontinuous Galerkin Methods</span></p>
+<ul class="current nav bd-sidenav">
+<li class="toctree-l1"><a class="reference internal" href="stationary.html">11. Stationary Transport Equation</a></li>
+<li class="toctree-l1"><a class="reference internal" href="instationary.html">12. Instationary Transport Equation</a></li>
+<li class="toctree-l1"><a class="reference internal" href="Nitsche.html">13. Nitsche’s Method for boundary and interface conditions</a></li>
+
+<li class="toctree-l1"><a class="reference internal" href="elliptic.html">15. Hybrid DG for elliptic equations</a></li>
+<li class="toctree-l1 current active"><a class="current reference internal" href="#">16. Splitting Methods for the time-dependent convection diffusion equation</a></li>
+<li class="toctree-l1"><a class="reference internal" href="fourthorder.html">17. Fourth Order Equation</a></li>
+<li class="toctree-l1"><a class="reference internal" href="stokes.html">18. H(div)-conforming Stokes</a></li>
+</ul>
+<p aria-level="2" class="caption" role="heading"><span class="caption-text">Iteration Methods</span></p>
+<ul class="nav bd-sidenav">
+<li class="toctree-l1"><a class="reference internal" href="../iterative/simple.html">19. Basic Iterative Methods</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../iterative/Richardson.html">20. The Richardson Iteration</a></li>
+
+
+<li class="toctree-l1"><a class="reference internal" href="../iterative/gradientmethod.html">23. The Gradient Method</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../iterative/preconditioning.html">24. Preconditioning</a></li>
+
+<li class="toctree-l1"><a class="reference internal" href="../iterative/Chebyshev.html">26. The Chebyshev Method</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../iterative/conjugategradients.html">27. Conjugate Gradients</a></li>
 </ul>
 
     </div>
@@ -335,7 +367,7 @@ <h1>Splitting Methods for the time-dependent convection diffusion equation</h1>
                 <article class="bd-article">
 
   <section class="tex2jax_ignore mathjax_ignore" id="splitting-methods-for-the-time-dependent-convection-diffusion-equation">
-<h1>Splitting Methods for the time-dependent convection diffusion equation<a class="headerlink" href="#splitting-methods-for-the-time-dependent-convection-diffusion-equation" title="Link to this heading">#</a></h1>
+<h1><span class="section-number">16. </span>Splitting Methods for the time-dependent convection diffusion equation<a class="headerlink" href="#splitting-methods-for-the-time-dependent-convection-diffusion-equation" title="Link to this heading">#</a></h1>
 <p><span class="math notranslate nohighlight">\(\DeclareMathOperator{\opdiv}{div}\)</span></p>
 <p>We now want to solve a time-dependent convection diffusion equation:</p>
 <div class="math notranslate nohighlight">
@@ -426,6 +458,11 @@ <h1>Splitting Methods for the time-dependent convection diffusion equation<a cla
 </pre></div>
 </div>
 </div>
+<div class="cell_output docutils container">
+<div class="output text_plain highlight-myst-ansi notranslate"><div class="highlight"><pre><span></span>&lt;ngsolve.comp.LinearForm at 0x1169ba630&gt;
+</pre></div>
+</div>
+</div>
 </div>
 <div class="cell docutils container">
 <div class="cell_input docutils container">
@@ -453,6 +490,20 @@ <h1>Splitting Methods for the time-dependent convection diffusion equation<a cla
 </pre></div>
 </div>
 </div>
+<div class="cell_output docutils container">
+<script type="application/vnd.jupyter.widget-view+json">{"version_major": 2, "version_minor": 0, "model_id": "4c9a4999127847e6a09c8ac8f920a567"}</script><div class="output traceback highlight-ipythontb notranslate"><div class="highlight"><pre><span></span><span class="gt">---------------------------------------------------------------------------</span>
+<span class="ne">KeyboardInterrupt</span><span class="g g-Whitespace">                         </span>Traceback (most recent call last)
+<span class="n">Cell</span> <span class="n">In</span><span class="p">[</span><span class="mi">4</span><span class="p">],</span> <span class="n">line</span> <span class="mi">15</span>
+<span class="g g-Whitespace">     </span><span class="mi">13</span> <span class="k">while</span> <span class="n">t</span> <span class="o">&lt;</span> <span class="n">tend</span><span class="p">:</span>
+<span class="g g-Whitespace">     </span><span class="mi">14</span>     <span class="n">t</span> <span class="o">+=</span> <span class="n">tau</span>
+<span class="ne">---&gt; </span><span class="mi">15</span>     <span class="n">aconv</span><span class="o">.</span><span class="n">Apply</span><span class="p">(</span><span class="n">gfu</span><span class="o">.</span><span class="n">vec</span><span class="p">,</span> <span class="n">convu</span><span class="p">)</span>
+<span class="g g-Whitespace">     </span><span class="mi">16</span>     <span class="n">r</span><span class="o">.</span><span class="n">data</span> <span class="o">=</span> <span class="n">f</span><span class="o">.</span><span class="n">vec</span> <span class="o">-</span> <span class="n">convu</span> <span class="o">-</span> <span class="n">adiff</span><span class="o">.</span><span class="n">mat</span> <span class="o">*</span> <span class="n">gfu</span><span class="o">.</span><span class="n">vec</span>
+<span class="g g-Whitespace">     </span><span class="mi">17</span>     <span class="n">w</span><span class="o">.</span><span class="n">data</span> <span class="o">=</span> <span class="n">inv</span> <span class="o">*</span> <span class="n">r</span>
+
+<span class="ne">KeyboardInterrupt</span>: 
+</pre></div>
+</div>
+</div>
 </div>
 <p>For higher order IMplicit-EXplicit (IMEX) methods see:</p>
 <p><em>Implicit-explicit Runge-Kutta methods for time-dependent pdes</em> by Uri M. Ascher, Steven J. Ruuth, and Raymond J. Spiteri, Applied Numerical Mathematics, 25, 1997</p>
@@ -488,6 +539,24 @@ <h1>Splitting Methods for the time-dependent convection diffusion equation<a cla
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@@ -516,7 +585,7 @@ <h1>Splitting Methods for the time-dependent convection diffusion equation<a cla
 
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+      © Copyright 2024.
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diff --git a/DG/stationary.html b/DG/stationary.html
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diff --git a/MPIparallel/PETSc_interface.html b/MPIparallel/PETSc_interface.html
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@@ -172,7 +172,7 @@
         <ul class="nav bd-sidenav bd-sidenav__home-link">
             <li class="toctree-l1">
                 <a class="reference internal" href="../intro.html">
-                    Introduction to Scientific Computing
+                    An Interactive Introduction to the Finite Element Method
                 </a>
             </li>
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@@ -182,6 +182,38 @@
 <li class="toctree-l1"><a class="reference internal" href="../primal/boundary_conditions.html">2. Boundary Conditions</a></li>
 <li class="toctree-l1"><a class="reference internal" href="../primal/subdomains.html">3. Variable Coefficients</a></li>
 <li class="toctree-l1"><a class="reference internal" href="../primal/solvers.html">4. Iterative Solvers</a></li>
+</ul>
+<p aria-level="2" class="caption" role="heading"><span class="caption-text">Mixed Finite Element Methods</span></p>
+<ul class="nav bd-sidenav">
+<li class="toctree-l1"><a class="reference internal" href="../mixed/stokes.html">5. Stokes Equation</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../mixed/boundary.html">6. Boundary Conditions</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../mixed/secondorder.html">7. Mixed Methods for second order equations</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../mixed/abstract.html">8. Abstract Theory</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../mixed/abstractfem.html">9. Abstract theory for mixed finite element methods</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../mixed/pardep.html">10. Parameter Dependent Problems</a></li>
+</ul>
+<p aria-level="2" class="caption" role="heading"><span class="caption-text">Discontinuous Galerkin Methods</span></p>
+<ul class="nav bd-sidenav">
+<li class="toctree-l1"><a class="reference internal" href="../DG/stationary.html">11. Stationary Transport Equation</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../DG/instationary.html">12. Instationary Transport Equation</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../DG/Nitsche.html">13. Nitsche’s Method for boundary and interface conditions</a></li>
+
+<li class="toctree-l1"><a class="reference internal" href="../DG/elliptic.html">15. Hybrid DG for elliptic equations</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../DG/splitting.html">16. Splitting Methods for the time-dependent convection diffusion equation</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../DG/fourthorder.html">17. Fourth Order Equation</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../DG/stokes.html">18. H(div)-conforming Stokes</a></li>
+</ul>
+<p aria-level="2" class="caption" role="heading"><span class="caption-text">Iteration Methods</span></p>
+<ul class="nav bd-sidenav">
+<li class="toctree-l1"><a class="reference internal" href="../iterative/simple.html">19. Basic Iterative Methods</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../iterative/Richardson.html">20. The Richardson Iteration</a></li>
+
+
+<li class="toctree-l1"><a class="reference internal" href="../iterative/gradientmethod.html">23. The Gradient Method</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../iterative/preconditioning.html">24. Preconditioning</a></li>
+
+<li class="toctree-l1"><a class="reference internal" href="../iterative/Chebyshev.html">26. The Chebyshev Method</a></li>
+<li class="toctree-l1"><a class="reference internal" href="../iterative/conjugategradients.html">27. Conjugate Gradients</a></li>
 </ul>
 
     </div>
@@ -564,7 +596,7 @@ <h2>PETSc preconditioner for NGSolve<a class="headerlink" href="#petsc-precondit
 
   <p class="copyright">
 
-      © Copyright 2023.
+      © Copyright 2024.
       <br/>
 
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