194   Mat           Amat;  in main()  local
349     PetscCall(DMCreateMatrix(dm, &Amat));  in main()
350 …PetscCall(MatSetOption(Amat, MAT_SYMMETRIC, PETSC_TRUE));        /* Some matrix kernels can take a…  in main()
351 …PetscCall(MatSetOption(Amat, MAT_SYMMETRY_ETERNAL, PETSC_TRUE)); /* Inform PETSc that Amat is alwa…  in main()
352     PetscCall(MatSetBlockSize(Amat, Ncomp));  in main()
353     PetscCall(MatSetOption(Amat, MAT_SPD, PETSC_TRUE));  in main()
354     PetscCall(MatSetOption(Amat, MAT_SPD_ETERNAL, PETSC_TRUE));  in main()
369       if (attach_nearnullspace) PetscCall(MatSetNearNullSpace(Amat, nearNullSpace));  in main()
373     PetscCall(SNESSetJacobian(snes, Amat, Amat, NULL, NULL));  in main()
399     PetscCall(SNESComputeJacobian(snes, xx, Amat, Amat));  in main()
400     PetscCall(MatViewFromOptions(Amat, NULL, "-my_mat_view"));  in main()
421     PetscCall(MatDestroy(&Amat));  in main()