# 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 [](../MatOrderings/index).
Examples
axpy.c
bandwidth.c
compressedrow.c
convert.c
freespace.c
freespace.h
gcreate.c
getcolv.c
matio.c
matstash.c
matstashspace.c
multequal.c
overlapsplit.c
pheap.c
zerodiag.c
zerorows.c
makefile