7   Vec       diff;  in TestVecEquality()  local
11   PetscCall(VecDuplicate(x, &diff));  in TestVecEquality()
12   PetscCall(VecCopy(x, diff));  in TestVecEquality()
13   PetscCall(VecAXPY(diff, -1.0, y));  in TestVecEquality()
14   PetscCall(VecNorm(diff, NORM_INFINITY, &err));  in TestVecEquality()
17   PetscCall(VecDestroy(&diff));  in TestVecEquality()
23   Mat       diff;  in TestMatEquality()  local
29   PetscCall(MatDuplicate(x, MAT_COPY_VALUES, &diff));  in TestMatEquality()
30   PetscCall(MatAXPY(diff, -1.0, y, SAME_NONZERO_PATTERN));  in TestMatEquality()
31   PetscCall(MatNorm(diff, NORM_FROBENIUS, &err));  in TestMatEquality()
34   PetscCall(MatDestroy(&diff));  in TestMatEquality()