3D fish is indeed optimal for -pc_mg_galerkin or -snes_fd_color or -snes_mf_operator (but demo for the latter two makes more sense w minimal)
3D fish is indeed optimal for -pc_mg_galerkin or -snes_fd_color or -snes_mf_operator (but demo for the latter two makes more sense w minimal)

bueler/p4pdes,bueler/p4pdes,bueler/p4pdes,bueler/p4pdes