fact: Definition isometry_from_to mCFD tau mCFR := prop_in2 mCFD (inPhantom (isometry tau)) /\ prop_in1 mCFD (inPhantom (forall phi, in_mem (tau phi) mCFR)).
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq path) mathcomp(div choice fintype tuple finfun bigop prime order) mathcomp(ssralg poly finset fingroup morphism perm) mathcomp(automorphism quotient finalg action gproduct) mathcomp(zmodp commutator cyclic center pgroup sylow) mathcomp(matrix vector falgebra ssrnum algC algnum) mathcomp(archimedean)