fact: Hypothesis well_defined_2arg: forall (a1 a2:A) (b1 b2:B), R a1 a2 -> S b1 b2 -> f a1 b1 = f a2 b2.
imports: Ensembles EnsemblesImplicit Image ImageImplicit Relation_Definitions Relation_Definitions_Implicit Description ProofIrrelevance EnsemblesSpec