Added code to get rid of duplicate rewriting rules. A rule is a duplicate of another rule when their types are alpha convertible. Eliminating duplicates speed up the tactic (but it slows down the operation of addition of a new rule that is also performed every time subst_mps is applied to the module).
Added code to get rid of duplicate rewriting rules.
A rule is a duplicate of another rule when their types are alpha convertible.
Eliminating duplicates speed up the tactic (but it slows down the operation
of addition of a new rule that is also performed every time subst_mps is applied
to the module).


git-svn-id: a49b465eaba45b67e2e1e4e0b2c256a71f59fecb@6266 85f007b7-540e-0410-9357-904b9bb8a0f7

SamB/coq