add doc

AMReX-Astro · Jul 30, 2024 · c3f4ea3 · c3f4ea3
1 parent 39959d8
commit c3f4ea3
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diff --git a/sphinx_docs/source/integrators.rst b/sphinx_docs/source/integrators.rst
@@ -276,6 +276,12 @@ The form looks like:
    A network is not required to provide a Jacobian if a numerical
    Jacobian is used.
 
+.. tip::
+
+   It is not necessary to zero the Jacobian elements at the top of the
+   ``actual_jac()`` function---this is handled by the wrapper that the
+   integrator calls.
+
 
 Jacobian wrapper
 ^^^^^^^^^^^^^^^^