fact: Definition inl_map2_property S S' u g := function_prop g (inductive_limit S) (inductive_limit S') /\ forall i, inc i (isI S) -> (inl_can_fun S' i) \co (Vg u i) = g \co (inl_can_fun S) i.
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat)