Theorem isof1o 5786

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 5207	. 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 2448   class class class wbr 3989   -1-1-onto->wf1o 5197   ` cfv 5198   Isom wiso 5199

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 5207

This theorem is referenced by:  isocnv2  5791  isores1  5793  isoini  5797  isoini2  5798  isoselem  5799  isose  5800  isopolem  5801  isosolem  5803  smoiso  6281  isotilem  6983  supisolem  6985  supisoex  6986  supisoti  6987  ordiso2  7012  leisorel  10772  zfz1isolemiso  10774  seq3coll  10777  summodclem2a  11344  prodmodclem2a  11539