In quantum field theory the professor claims in his notes that
$$(-\gamma^{\mu}\gamma^{\nu}\partial_{\mu}\partial_{\nu}-m^{2})\psi=0<script type="math/tex; mode=display"><br /> and the he says that since both derivatives commute only the symmetric part of the product between the gamma matrices survives. wtf? ive trid all i could remember and the antisymmetric part doesnt dissapear. whats happening here?$$