This routine is part of the liesymm package and is loaded via with(liesymm) .

The routine wsubs() is analogous to powsubs() but is for wedge products.  One or more equations specify replacements that are to be made.

The replacements occur even if only a subset of the  arguments match.

If two or more substitutions are specified, they are completed in the order specified, even if they are given as a set. Simultaneous substitution (as in subs()) has not been implemented.