Theorem cnvf1o 6313

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 2205	. 2 |- ( x e. A |-> U. `' { x } ) = ( x e. A |-> U. `' { x } )
2		snexg 4229	. . . 4 |- ( x e. A -> { x } e. _V )
3		cnvexg 5221	. . . 4 |- ( { x } e. _V -> `' { x } e. _V )
4		uniexg 4487	. . . 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 4229	. . . 4 |- ( y e. `' A -> { y } e. _V )
8		cnvexg 5221	. . . 4 |- ( { y } e. _V -> `' { y } e. _V )
9		uniexg 4487	. . . 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 6312	. . 3 |- ( ( Rel A /\ ( x e. A /\ y = U. `' { x } ) ) -> ( y e. `' A /\ x = U. `' { y } ) )
13		relcnv 5061	. . . . 5 |- Rel `' A
14		simpr 110	. . . . 5 |- ( ( Rel A /\ ( y e. `' A /\ x = U. `' { y } ) ) -> ( y e. `' A /\ x = U. `' { y } ) )
15		cnvf1olem 6312	. . . . 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 5134	. . . . . . 7 |- ( Rel A <-> `' `' A = A )
18		eleq2 2269	. . . . . . 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 596	. 2 |- ( Rel A -> ( ( x e. A /\ y = U. `' { x } ) <-> ( y e. `' A /\ x = U. `' { y } ) ) )
24	1, 6, 11, 23	f1od 6151	1 |- ( Rel A -> ( x e. A |-> U. `' { x } ) : A -1-1-onto-> `' A )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   = wceq 1373   e. wcel 2176   _Vcvv 2772   {csn 3633   U.cuni 3850   |-> cmpt 4106   `'ccnv 4675   Rel wrel 4681   -1-1-onto->wf1o 5271

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 711  ax-5 1470  ax-7 1471  ax-gen 1472  ax-ie1 1516  ax-ie2 1517  ax-8 1527  ax-10 1528  ax-11 1529  ax-i12 1530  ax-bndl 1532  ax-4 1533  ax-17 1549  ax-i9 1553  ax-ial 1557  ax-i5r 1558  ax-13 2178  ax-14 2179  ax-ext 2187  ax-sep 4163  ax-pow 4219  ax-pr 4254  ax-un 4481

This theorem depends on definitions:  df-bi 117  df-3an 983  df-tru 1376  df-nf 1484  df-sb 1786  df-eu 2057  df-mo 2058  df-clab 2192  df-cleq 2198  df-clel 2201  df-nfc 2337  df-ral 2489  df-rex 2490  df-v 2774  df-sbc 2999  df-un 3170  df-in 3172  df-ss 3179  df-pw 3618  df-sn 3639  df-pr 3640  df-op 3642  df-uni 3851  df-br 4046  df-opab 4107  df-mpt 4108  df-id 4341  df-xp 4682  df-rel 4683  df-cnv 4684  df-co 4685  df-dm 4686  df-rn 4687  df-iota 5233  df-fun 5274  df-fn 5275  df-f 5276  df-f1 5277  df-fo 5278  df-f1o 5279  df-fv 5280  df-1st 6228  df-2nd 6229

This theorem is referenced by:  tposf12  6357  cnven  6902  xpcomf1o  6922  fsumcnv  11781  fprodcnv  11969