:py:mod:`tlm_adjoint.firedrake.expr`
====================================

.. py:module:: tlm_adjoint.firedrake.expr

.. autoapi-nested-parse::

   Symbolic expression functionality.

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Module Contents
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.. py:class:: Zero


   
   Mixin for defining a zero-valued variable. Used for zero-valued
   variables for which UFL zero elimination should not be applied.
















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.. py:function:: eliminate_zeros(expr)

   
   Apply zero elimination for :class:`.Zero` objects in the supplied
   :class:`ufl.core.expr.Expr` or :class:`ufl.form.BaseForm`.

   :arg expr: A :class:`ufl.core.expr.Expr` or :class:`ufl.form.BaseForm`.
   :returns: A :class:`ufl.core.expr.Expr` or :class:`ufl.form.BaseForm` with
       zero elimination applied. May return `expr`.















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.. py:class:: Replacement


   
   Represents a symbolic variable but with no value.
















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