# Matrix Operations (Mat)

PETSc matrices (`Mat` objects) are used to store Jacobians and other sparse matrices
in PDE-based (or other) simulations.  Users guide chapter: [](ch_matrices). See also [](../MatGraphOperations/index).

<A HREF="../../../../../src/mat/tutorials/index.html">Examples</A><BR>

<p>

<p>
Source files
<p><a href="fdmpiaij.c.html">fdmpiaij.c</a><br>
<a href="mpihashmat.h.html">mpihashmat.h</a><br>
<a href="mpiptap.c.html">mpiptap.c</a><br>
<a href="mpimatmatmatmult.c.html">mpimatmatmatmult.c</a><br>
<a href="mpiaijpc.c.html">mpiaijpc.c</a><br>
<a href="mpiov.c.html">mpiov.c</a><br>
<a href="mpiaij.h.html">mpiaij.h</a><br>
<a href="mpb_aij.c.html">mpb_aij.c</a><br>
<a href="mpimatmatmult.c.html">mpimatmatmult.c</a><br>
<a href="mpiaij.c.html">mpiaij.c</a><br>
<a href="mmaij.c.html">mmaij.c</a><br>
<a href="mpimattransposematmult.c.html">mpimattransposematmult.c</a><br>

<p>
Directories
<p><a href="mpiviennacl/index.html">mpiviennacl</a><br>
<a href="aijmkl/index.html">aijmkl</a><br>
<a href="aijperm/index.html">aijperm</a><br>
<a href="mumps/index.html">mumps</a><br>
<a href="mpiviennaclcuda/index.html">mpiviennaclcuda</a><br>
<a href="aijsell/index.html">aijsell</a><br>
<a href="mpicusparse/index.html">mpicusparse</a><br>
<a href="pastix/index.html">pastix</a><br>
<a href="mkl_cpardiso/index.html">mkl_cpardiso</a><br>
<a href="kokkos/index.html">kokkos</a><br>
<a href="mpihipsparse/index.html">mpihipsparse</a><br>
<a href="crl/index.html">crl</a><br>
<a href="superlu_dist/index.html">superlu_dist</a><br>
<a href="strumpack/index.html">strumpack</a><br>