expected_A = [-1, 0, 0, 0, 0; ... -16, 32, -16, 0, 0; ... 0, -16, 32, -16, 0; ... 0, 0, -16, 32, -16; ... 0, 0, 0, 0, -1]; unit_test_equals("Homework #1 problem #1 Poisson matrix is correct", ... true, ... expected_A == poisson_matrix(4, 0, 1));