Theorem isof1o 5850

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 5263	. 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 274	1 |- ( H Isom R , S ( A , B ) -> H : A -1-1-onto-> B )

Syntax hints:   -> wi 4   <-> wb 105   A.wral 2472   class class class wbr 4029   -1-1-onto->wf1o 5253   ` cfv 5254   Isom wiso 5255

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106

This theorem depends on definitions:  df-bi 117  df-isom 5263

This theorem is referenced by:  isocnv2  5855  isores1  5857  isoini  5861  isoini2  5862  isoselem  5863  isose  5864  isopolem  5865  isosolem  5867  smoiso  6355  isotilem  7065  supisolem  7067  supisoex  7068  supisoti  7069  ordiso2  7094  leisorel  10908  zfz1isolemiso  10910  seq3coll  10913  summodclem2a  11524  prodmodclem2a  11719