fact: Definition at0 (f : nat -> nat -> nat) (s : nat) (n d : nat) := if andb (Nat.eqb n 0) (Nat.eqb d 0) then s else f n d.
imports: mathcomp.ssreflect.ssreflect mathcomp(ssrnat ssrbool eqtype div) ExtLib(Structures.Monad) SimpleIO(SimpleIO) QuickChick(RoseTrees RandomQC Generators Producer SemChecker) QuickChick(Show Checker State Classes) Coq.Strings.Ascii Coq.Strings.String List Recdef Arith.EqNat