Theorem isoid 5933

Description: Identity law for isomorphism. Proposition 6.30(1) of [TakeutiZaring] p. 33. (Contributed by NM, 27-Apr-2004.)

Assertion

Ref	Expression
isoid	|- ( _I |` A ) Isom R , R ( A , A )

Proof of Theorem isoid

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

Step	Hyp	Ref	Expression
1		f1oi 5610	. 2 |- ( _I |` A ) : A -1-1-onto-> A
2		fvresi 5831	. . . . 5 |- ( x e. A -> ( ( _I |` A ) ` x ) = x )
3		fvresi 5831	. . . . 5 |- ( y e. A -> ( ( _I |` A ) ` y ) = y )
4	2, 3	breqan12d 4098	. . . 4 |- ( ( x e. A /\ y e. A ) -> ( ( ( _I |` A ) ` x ) R ( ( _I |` A ) ` y ) <-> x R y ) )
5	4	bicomd 141	. . 3 |- ( ( x e. A /\ y e. A ) -> ( x R y <-> ( ( _I |` A ) ` x ) R ( ( _I |` A ) ` y ) ) )
6	5	rgen2a 2584	. 2 |- A. x e. A A. y e. A ( x R y <-> ( ( _I |` A ) ` x ) R ( ( _I |` A ) ` y ) )
7		df-isom 5326	. 2 |- ( ( _I |` A ) Isom R , R ( A , A ) <-> ( ( _I |` A ) : A -1-1-onto-> A /\ A. x e. A A. y e. A ( x R y <-> ( ( _I |` A ) ` x ) R ( ( _I |` A ) ` y ) ) ) )
8	1, 6, 7	mpbir2an 948	1 |- ( _I |` A ) Isom R , R ( A , A )

Syntax hints:   /\ wa 104   <-> wb 105   e. wcel 2200   A.wral 2508   class class class wbr 4082   _I cid 4378   |` cres 4720   -1-1-onto->wf1o 5316   ` cfv 5317   Isom wiso 5318

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-14 2203  ax-ext 2211  ax-sep 4201  ax-pow 4257  ax-pr 4292

This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ral 2513  df-rex 2514  df-v 2801  df-sbc 3029  df-un 3201  df-in 3203  df-ss 3210  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3888  df-br 4083  df-opab 4145  df-id 4383  df-xp 4724  df-rel 4725  df-cnv 4726  df-co 4727  df-dm 4728  df-rn 4729  df-res 4730  df-ima 4731  df-iota 5277  df-fun 5319  df-fn 5320  df-f 5321  df-f1 5322  df-fo 5323  df-f1o 5324  df-fv 5325  df-isom 5326

This theorem is referenced by:  ordiso  7199