146696af2SBarry Smith# Matrix Operations (Mat) 246696af2SBarry Smith 346696af2SBarry SmithPETSc matrices (`Mat` objects) are used to store Jacobians and other sparse matrices 4*8be712e4SBarry Smithin PDE-based (or other) simulations. Users guide chapter: [](ch_matrices). See also [](../MatGraphOperations/index). 546696af2SBarry Smith 646696af2SBarry Smith<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/tutorials/index.html">Examples</A><BR> 7