Theorem cnvf1o 6423

Description: Describe a function that maps the elements of a set to its converse bijectively. (Contributed by Mario Carneiro, 27-Apr-2014.)

Assertion

Ref	Expression
cnvf1o	|- ( Rel A -> ( x e. A |-> U. `' { x } ) : A -1-1-onto-> `' A )

Distinct variable group:   x, A

Proof of Theorem cnvf1o

Dummy variable y is distinct from all other variables.

Step	Hyp	Ref	Expression
1		eqid 2234	. 2 |- ( x e. A |-> U. `' { x } ) = ( x e. A |-> U. `' { x } )
2		snexg 4299	. . . 4 |- ( x e. A -> { x } e. _V )
3		cnvexg 5302	. . . 4 |- ( { x } e. _V -> `' { x } e. _V )
4		uniexg 4562	. . . 4 |- ( `' { x } e. _V -> U. `' { x } e. _V )
5	2, 3, 4	3syl 17	. . 3 |- ( x e. A -> U. `' { x } e. _V )
6	5	adantl 277	. 2 |- ( ( Rel A /\ x e. A ) -> U. `' { x } e. _V )
7		snexg 4299	. . . 4 |- ( y e. `' A -> { y } e. _V )
8		cnvexg 5302	. . . 4 |- ( { y } e. _V -> `' { y } e. _V )
9		uniexg 4562	. . . 4 |- ( `' { y } e. _V -> U. `' { y } e. _V )
10	7, 8, 9	3syl 17	. . 3 |- ( y e. `' A -> U. `' { y } e. _V )
11	10	adantl 277	. 2 |- ( ( Rel A /\ y e. `' A ) -> U. `' { y } e. _V )
12		cnvf1olem 6422	. . 3 |- ( ( Rel A /\ ( x e. A /\ y = U. `' { x } ) ) -> ( y e. `' A /\ x = U. `' { y } ) )
13		relcnv 5142	. . . . 5 |- Rel `' A
14		simpr 110	. . . . 5 |- ( ( Rel A /\ ( y e. `' A /\ x = U. `' { y } ) ) -> ( y e. `' A /\ x = U. `' { y } ) )
15		cnvf1olem 6422	. . . . 5 |- ( ( Rel `' A /\ ( y e. `' A /\ x = U. `' { y } ) ) -> ( x e. `' `' A /\ y = U. `' { x } ) )
16	13, 14, 15	sylancr 414	. . . 4 |- ( ( Rel A /\ ( y e. `' A /\ x = U. `' { y } ) ) -> ( x e. `' `' A /\ y = U. `' { x } ) )
17		dfrel2 5215	. . . . . . 7 |- ( Rel A <-> `' `' A = A )
18		eleq2 2298	. . . . . . 7 |- ( `' `' A = A -> ( x e. `' `' A <-> x e. A ) )
19	17, 18	sylbi 121	. . . . . 6 |- ( Rel A -> ( x e. `' `' A <-> x e. A ) )
20	19	anbi1d 465	. . . . 5 |- ( Rel A -> ( ( x e. `' `' A /\ y = U. `' { x } ) <-> ( x e. A /\ y = U. `' { x } ) ) )
21	20	adantr 276	. . . 4 |- ( ( Rel A /\ ( y e. `' A /\ x = U. `' { y } ) ) -> ( ( x e. `' `' A /\ y = U. `' { x } ) <-> ( x e. A /\ y = U. `' { x } ) ) )
22	16, 21	mpbid 147	. . 3 |- ( ( Rel A /\ ( y e. `' A /\ x = U. `' { y } ) ) -> ( x e. A /\ y = U. `' { x } ) )
23	12, 22	impbida 600	. 2 |- ( Rel A -> ( ( x e. A /\ y = U. `' { x } ) <-> ( y e. `' A /\ x = U. `' { y } ) ) )
24	1, 6, 11, 23	f1od 6260	1 |- ( Rel A -> ( x e. A |-> U. `' { x } ) : A -1-1-onto-> `' A )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   = wceq 1398   e. wcel 2205   _Vcvv 2815   {csn 3691   U.cuni 3916   |-> cmpt 4173   `'ccnv 4750   Rel wrel 4756   -1-1-onto->wf1o 5353

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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2207  ax-14 2208  ax-ext 2216  ax-sep 4230  ax-pow 4289  ax-pr 4324  ax-un 4556

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-eu 2085  df-mo 2086  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ral 2527  df-rex 2528  df-v 2817  df-sbc 3045  df-un 3217  df-in 3219  df-ss 3226  df-pw 3673  df-sn 3697  df-pr 3698  df-op 3700  df-uni 3917  df-br 4112  df-opab 4174  df-mpt 4175  df-id 4416  df-xp 4757  df-rel 4758  df-cnv 4759  df-co 4760  df-dm 4761  df-rn 4762  df-iota 5314  df-fun 5356  df-fn 5357  df-f 5358  df-f1 5359  df-fo 5360  df-f1o 5361  df-fv 5362  df-1st 6336  df-2nd 6337

This theorem is referenced by:  tposf12  6502  cnven  7051  xpcomf1o  7078  fsumcnv  12127  fprodcnv  12315