# 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

petscmat.h
petscmatfactorinfosize.h
petscmatinfosize.h
petscmatmod.F90