# 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>

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Source files
<p><a href="aij.c.html">aij.c</a><br>
<a href="inode.c.html">inode.c</a><br>
<a href="matmatmult.c.html">matmatmult.c</a><br>
<a href="aij.h.html">aij.h</a><br>
<a href="matrart.c.html">matrart.c</a><br>
<a href="mattransposematmult.c.html">mattransposematmult.c</a><br>
<a href="seqhashmat.h.html">seqhashmat.h</a><br>
<a href="fdaij.c.html">fdaij.c</a><br>
<a href="matmatmatmult.c.html">matmatmatmult.c</a><br>
<a href="seqhashmatsetvalues.h.html">seqhashmatsetvalues.h</a><br>
<a href="aijfact.c.html">aijfact.c</a><br>
<a href="symtranspose.c.html">symtranspose.c</a><br>
<a href="matptap.c.html">matptap.c</a><br>
<a href="ij.c.html">ij.c</a><br>
<a href="inode2.c.html">inode2.c</a><br>

<p>
Directories
<p><a href="seqviennacl/index.html">seqviennacl</a><br>
<a href="umfpack/index.html">umfpack</a><br>
<a href="aijmkl/index.html">aijmkl</a><br>
<a href="aijperm/index.html">aijperm</a><br>
<a href="spqr/index.html">spqr</a><br>
<a href="cholmod/index.html">cholmod</a><br>
<a href="superlu/index.html">superlu</a><br>
<a href="matlab/index.html">matlab</a><br>
<a href="aijsell/index.html">aijsell</a><br>
<a href="essl/index.html">essl</a><br>
<a href="ftn-kernels/index.html">ftn-kernels</a><br>
<a href="lusol/index.html">lusol</a><br>
<a href="seqhipsparse/index.html">seqhipsparse</a><br>
<a href="hdf5/index.html">hdf5</a><br>
<a href="seqcusparse/index.html">seqcusparse</a><br>
<a href="mkl_pardiso/index.html">mkl_pardiso</a><br>
<a href="kokkos/index.html">kokkos</a><br>
<a href="bas/index.html">bas</a><br>
<a href="seqviennaclcuda/index.html">seqviennaclcuda</a><br>
<a href="crl/index.html">crl</a><br>
<a href="klu/index.html">klu</a><br>