Theorem isof1o 5775

Description: An isomorphism is a one-to-one onto function. (Contributed by NM, 27-Apr-2004.)

Assertion

Ref	Expression
isof1o	|- ( H Isom R , S ( A , B ) -> H : A -1-1-onto-> B )

Proof of Theorem isof1o

Dummy variables x y are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		df-isom 5197	. 2 |- ( H Isom R , S ( A , B ) <-> ( H : A -1-1-onto-> B /\ A. x e. A A. y e. A ( x R y <-> ( H ` x ) S ( H ` y ) ) ) )
2	1	simplbi 272	1 |- ( H Isom R , S ( A , B ) -> H : A -1-1-onto-> B )

Syntax hints:   -> wi 4   <-> wb 104   A.wral 2444   class class class wbr 3982   -1-1-onto->wf1o 5187   ` cfv 5188   Isom wiso 5189

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105

This theorem depends on definitions:  df-bi 116  df-isom 5197

This theorem is referenced by:  isocnv2  5780  isores1  5782  isoini  5786  isoini2  5787  isoselem  5788  isose  5789  isopolem  5790  isosolem  5792  smoiso  6270  isotilem  6971  supisolem  6973  supisoex  6974  supisoti  6975  ordiso2  7000  leisorel  10750  zfz1isolemiso  10752  seq3coll  10755  summodclem2a  11322  prodmodclem2a  11517