* @return newly constructed object */
ex dirac_gamma5(unsigned char rl = 0);
+/** This returns (dirac_ONE(rl) + dirac_gamma5(rl)). */
+ex dirac_gamma6(unsigned char rl = 0);
+
+/** This returns (dirac_ONE(rl) - dirac_gamma5(rl)). */
+ex dirac_gamma7(unsigned char rl = 0);
+
/** Create a term of the form e_mu * gamma~mu with a unique index mu.
*
* @param dim Dimension of index