File petsc_laplace.cxx# Defines KSP_RICHARDSON# KSP_CHEBYSHEV# KSP_CG# KSP_GMRES# KSP_TCQMR# KSP_BCGS# KSP_CGS# KSP_TFQMR# KSP_CR# KSP_LSQR# KSP_BICG# KSP_PREONLY# Functions static PetscErrorCode laplacePCapply(PC pc, Vec x, Vec y)