\mathbfv \times \mathbfb = \langle v_3 \cdot 1 - v_2 \cdot 0, v_1 \cdot 0 - v_3 \cdot 0, v_2 \cdot 0 - v_1 \cdot 1 \rangle = \langle v_3, 0, -v_1 \rangle. - Groen Casting