a ..}) - (\partial_t A^{\beta ..})\,(\Delta_a^{\scsc\#} \Delta_b^{\scsc\#} A^{\alpha ..})\big] \\[0.00cm] {\ds + \frac{0}{0}\, \frac{\partial^0 L(..)}{\partial y_0^{\alpha ..} \partial y_0^{\beta ..}}_{|..} \cdot \big[ \Delta_a^{\scsc\#} (\