fact: Definition local_rel (U : pcm) (R : U -> U -> Prop) (cond : U -> Prop) := forall p x y, cond (x \+ p \+ y) -> R x (p \+ y) -> R (x \+ p) y.
imports: Coq(ssreflect ssrbool ssrfun) mathcomp(ssrnat eqtype seq bigop fintype finset) pcm(options axioms prelude seqperm pred seqext)