# Matrix Operations (Mat) Examples
PETSc matrices (`Mat` objects) are used to store Jacobians and other sparse matrices in PDE-based (or other) simulations. ## [](../MatOrderings/index)

baijmkl/
baijov.c
mmbaij.c
mpb_baij.c
mpiaijbaij.c
mpibaij.c
mpibaij.h
makefile