fact: CoInductive T1ltn_xor_geq m n : bool -> bool -> Set := | T1LtnNotGeq of m < n : T1ltn_xor_geq m n false true | T1GeqNotLtn of n <= m : T1ltn_xor_geq m n true false.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat) mathcomp(fintype bigop)