Theorem cnvf1o 6461

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 2238	. 2 |- ( x e. A |-> U. `' { x } ) = ( x e. A |-> U. `' { x } )
2		snexg 4321	. . . 4 |- ( x e. A -> { x } e. _V )
3		cnvexg 5325	. . . 4 |- ( { x } e. _V -> `' { x } e. _V )
4		uniexg 4585	. . . 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 4321	. . . 4 |- ( y e. `' A -> { y } e. _V )
8		cnvexg 5325	. . . 4 |- ( { y } e. _V -> `' { y } e. _V )
9		uniexg 4585	. . . 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 6460	. . 3 |- ( ( Rel A /\ ( x e. A /\ y = U. `' { x } ) ) -> ( y e. `' A /\ x = U. `' { y } ) )
13		relcnv 5165	. . . . 5 |- Rel `' A
14		simpr 110	. . . . 5 |- ( ( Rel A /\ ( y e. `' A /\ x = U. `' { y } ) ) -> ( y e. `' A /\ x = U. `' { y } ) )
15		cnvf1olem 6460	. . . . 5 |- ( ( Rel `' A /\ ( y e. `' A /\ x = U. `' { y } ) ) -> ( x e. `' `' A /\ y = U. `' { x } ) )
16	13, 14, 15	sylancr 418	. . . 4 |- ( ( Rel A /\ ( y e. `' A /\ x = U. `' { y } ) ) -> ( x e. `' `' A /\ y = U. `' { x } ) )
17		dfrel2 5238	. . . . . . 7 |- ( Rel A <-> `' `' A = A )
18		eleq2 2302	. . . . . . 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 469	. . . . 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 604	. 2 |- ( Rel A -> ( ( x e. A /\ y = U. `' { x } ) <-> ( y e. `' A /\ x = U. `' { y } ) ) )
24	1, 6, 11, 23	f1od 6293	1 |- ( Rel A -> ( x e. A |-> U. `' { x } ) : A -1-1-onto-> `' A )

This proof depends on syntax axioms:   -> wi 4   /\ wa 104   <-> wb 105   = wceq 1402   e. wcel 2209   _Vcvv 2821   {csn 3709   U.cuni 3935   |-> cmpt 4192   `'ccnv 4773   Rel wrel 4779   -1-1-onto->wf1o 5376

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4249  ax-pow 4311  ax-pr 4346  ax-un 4578

This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-v 2823  df-sbc 3052  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-br 4131  df-opab 4193  df-mpt 4194  df-id 4438  df-xp 4780  df-rel 4781  df-cnv 4782  df-co 4783  df-dm 4784  df-rn 4785  df-iota 5337  df-fun 5379  df-fn 5380  df-f 5381  df-f1 5382  df-fo 5383  df-f1o 5384  df-fv 5385  df-1st 6374  df-2nd 6375

This theorem is used by:  tposf12  6540  cnven  7096  xpcomf1o  7123  fsumcnv  12204  fprodcnv  12392