# 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). Examples

Source files

color.c
color.h
degr.c
dsm.c
ido.c
numsrt.c
seq.c
setr.c
slo.c