fact: Definition guard_ax A B ts e (f : omap_fun (nat_mapUMC A) (nat_mapUMC B)) := untag e = f (omf_interp id_omap_fun ts).
imports: Coq(ssreflect ssrbool ssrfun) mathcomp(ssrnat eqtype seq) pcm(options pred prelude) pcm(pcm unionmap natmap)