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+    <title>Overview: module code &#8212; Irksome 20202.0 documentation</title>
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+  <h1>All modules for which code is available</h1>
+<ul><li><a href="irksome/ButcherTableaux.html">irksome.ButcherTableaux</a></li>
+<li><a href="irksome/bcs.html">irksome.bcs</a></li>
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+<li><a href="irksome/discontinuous_galerkin_stepper.html">irksome.discontinuous_galerkin_stepper</a></li>
+<li><a href="irksome/explicit_stepper.html">irksome.explicit_stepper</a></li>
+<li><a href="irksome/galerkin_stepper.html">irksome.galerkin_stepper</a></li>
+<li><a href="irksome/getForm.html">irksome.getForm</a></li>
+<li><a href="irksome/imex.html">irksome.imex</a></li>
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+<li><a href="irksome/pep_explicit_rk.html">irksome.pep_explicit_rk</a></li>
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diff --git a/_modules/irksome/ButcherTableaux.html b/_modules/irksome/ButcherTableaux.html
diff --git a/_modules/irksome/bcs.html b/_modules/irksome/bcs.html
diff --git a/_modules/irksome/deriv.html b/_modules/irksome/deriv.html
diff --git a/_modules/irksome/dirk_imex_tableaux.html b/_modules/irksome/dirk_imex_tableaux.html
diff --git a/_modules/irksome/dirk_stepper.html b/_modules/irksome/dirk_stepper.html
diff --git a/_modules/irksome/discontinuous_galerkin_stepper.html b/_modules/irksome/discontinuous_galerkin_stepper.html
diff --git a/_modules/irksome/explicit_stepper.html b/_modules/irksome/explicit_stepper.html
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+
+  <h1>Source code for irksome.explicit_stepper</h1><div class="highlight"><pre>
+<span></span><span class="kn">from</span><span class="w"> </span><span class="nn">.dirk_stepper</span><span class="w"> </span><span class="kn">import</span> <span class="n">DIRKTimeStepper</span>
+
+
+<span class="c1"># We can reuse the DIRK stepper to do one-stage at a time, but since we&#39;re</span>
+<span class="c1"># just solving a mass matrix at each time step we can optimize to</span>
+<span class="c1"># never rebuild the jacobian or preconditioner.</span>
+<div class="viewcode-block" id="ExplicitTimeStepper">
+<a class="viewcode-back" href="../../irksome.html#irksome.explicit_stepper.ExplicitTimeStepper">[docs]</a>
+<span class="k">class</span><span class="w"> </span><span class="nc">ExplicitTimeStepper</span><span class="p">(</span><span class="n">DIRKTimeStepper</span><span class="p">):</span>
+    <span class="k">def</span><span class="w"> </span><span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">F</span><span class="p">,</span> <span class="n">butcher_tableau</span><span class="p">,</span> <span class="n">t</span><span class="p">,</span> <span class="n">dt</span><span class="p">,</span> <span class="n">u0</span><span class="p">,</span> <span class="n">bcs</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
+                 <span class="n">solver_parameters</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
+                 <span class="n">appctx</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
+        <span class="k">assert</span> <span class="n">butcher_tableau</span><span class="o">.</span><span class="n">is_explicit</span>
+        <span class="c1"># we just have one mass matrix we&#39;re reusing for each time step and</span>
+        <span class="c1"># each stage, so we can nudge this along</span>
+        <span class="n">solver_parameters</span> <span class="o">=</span> <span class="p">{}</span> <span class="k">if</span> <span class="n">solver_parameters</span> <span class="ow">is</span> <span class="kc">None</span> <span class="k">else</span> <span class="n">solver_parameters</span>
+        <span class="n">solver_parameters</span><span class="p">[</span><span class="s2">&quot;snes_lag_jacobian_persists&quot;</span><span class="p">]</span> <span class="o">=</span> <span class="s2">&quot;true&quot;</span>
+        <span class="n">solver_parameters</span><span class="p">[</span><span class="s2">&quot;snes_lag_jacobian&quot;</span><span class="p">]</span> <span class="o">=</span> <span class="o">-</span><span class="mi">2</span>
+        <span class="n">solver_parameters</span><span class="p">[</span><span class="s2">&quot;snes_lag_preconditioner_persists&quot;</span><span class="p">]</span> <span class="o">=</span> <span class="s2">&quot;true&quot;</span>
+        <span class="n">solver_parameters</span><span class="p">[</span><span class="s2">&quot;snes_lag_preconditioner&quot;</span><span class="p">]</span> <span class="o">=</span> <span class="o">-</span><span class="mi">2</span>
+        <span class="nb">super</span><span class="p">(</span><span class="n">ExplicitTimeStepper</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span>
+            <span class="n">F</span><span class="p">,</span> <span class="n">butcher_tableau</span><span class="p">,</span> <span class="n">t</span><span class="p">,</span> <span class="n">dt</span><span class="p">,</span> <span class="n">u0</span><span class="p">,</span> <span class="n">bcs</span><span class="o">=</span><span class="n">bcs</span><span class="p">,</span>
+            <span class="n">solver_parameters</span><span class="o">=</span><span class="n">solver_parameters</span><span class="p">,</span> <span class="n">appctx</span><span class="o">=</span><span class="n">appctx</span><span class="p">,</span>
+            <span class="n">nullspace</span><span class="o">=</span><span class="kc">None</span><span class="p">)</span></div>
+
+</pre></div>
+
+            <div class="clearer"></div>
+          </div>
+        </div>
+      </div>
+    </div>
+      <div class="clearer"></div>
+    </div>
+    <div class="footer" role="contentinfo">
+    &#169; Copyright 2020-, Robert C Kirby and others.
+    </div>
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+</html>