Theorem f1oprg 6181

Description: An unordered pair of ordered pairs with different elements is a one-to-one onto function, analogous to f1oprswap 6180. (Contributed by Alexander van der Vekens, 14-Aug-2017.)

Assertion

Ref	Expression
f1oprg	|- ( ( ( A e. V /\ B e. W ) /\ ( C e. X /\ D e. Y ) ) -> ( ( A =/= C /\ B =/= D ) -> { <. A , B >. , <. C , D >. } : { A , C } -1-1-onto-> { B , D } ) )

Proof of Theorem f1oprg

Step	Hyp	Ref	Expression
1		f1osng 6177	. . . . 5 |- ( ( A e. V /\ B e. W ) -> { <. A , B >. } : { A } -1-1-onto-> { B } )
2	1	ad2antrr 762	. . . 4 |- ( ( ( ( A e. V /\ B e. W ) /\ ( C e. X /\ D e. Y ) ) /\ ( A =/= C /\ B =/= D ) ) -> { <. A , B >. } : { A } -1-1-onto-> { B } )
3		f1osng 6177	. . . . 5 |- ( ( C e. X /\ D e. Y ) -> { <. C , D >. } : { C } -1-1-onto-> { D } )
4	3	ad2antlr 763	. . . 4 |- ( ( ( ( A e. V /\ B e. W ) /\ ( C e. X /\ D e. Y ) ) /\ ( A =/= C /\ B =/= D ) ) -> { <. C , D >. } : { C } -1-1-onto-> { D } )
5		disjsn2 4247	. . . . 5 |- ( A =/= C -> ( { A } i^i { C } ) = (/) )
6	5	ad2antrl 764	. . . 4 |- ( ( ( ( A e. V /\ B e. W ) /\ ( C e. X /\ D e. Y ) ) /\ ( A =/= C /\ B =/= D ) ) -> ( { A } i^i { C } ) = (/) )
7		disjsn2 4247	. . . . 5 |- ( B =/= D -> ( { B } i^i { D } ) = (/) )
8	7	ad2antll 765	. . . 4 |- ( ( ( ( A e. V /\ B e. W ) /\ ( C e. X /\ D e. Y ) ) /\ ( A =/= C /\ B =/= D ) ) -> ( { B } i^i { D } ) = (/) )
9		f1oun 6156	. . . 4 |- ( ( ( { <. A , B >. } : { A } -1-1-onto-> { B } /\ { <. C , D >. } : { C } -1-1-onto-> { D } ) /\ ( ( { A } i^i { C } ) = (/) /\ ( { B } i^i { D } ) = (/) ) ) -> ( { <. A , B >. } u. { <. C , D >. } ) : ( { A } u. { C } ) -1-1-onto-> ( { B } u. { D } ) )
10	2, 4, 6, 8, 9	syl22anc 1327	. . 3 |- ( ( ( ( A e. V /\ B e. W ) /\ ( C e. X /\ D e. Y ) ) /\ ( A =/= C /\ B =/= D ) ) -> ( { <. A , B >. } u. { <. C , D >. } ) : ( { A } u. { C } ) -1-1-onto-> ( { B } u. { D } ) )
11		df-pr 4180	. . . . . 6 |- { <. A , B >. , <. C , D >. } = ( { <. A , B >. } u. { <. C , D >. } )
12	11	eqcomi 2631	. . . . 5 |- ( { <. A , B >. } u. { <. C , D >. } ) = { <. A , B >. , <. C , D >. }
13	12	a1i 11	. . . 4 |- ( ( ( ( A e. V /\ B e. W ) /\ ( C e. X /\ D e. Y ) ) /\ ( A =/= C /\ B =/= D ) ) -> ( { <. A , B >. } u. { <. C , D >. } ) = { <. A , B >. , <. C , D >. } )
14		df-pr 4180	. . . . . 6 |- { A , C } = ( { A } u. { C } )
15	14	eqcomi 2631	. . . . 5 |- ( { A } u. { C } ) = { A , C }
16	15	a1i 11	. . . 4 |- ( ( ( ( A e. V /\ B e. W ) /\ ( C e. X /\ D e. Y ) ) /\ ( A =/= C /\ B =/= D ) ) -> ( { A } u. { C } ) = { A , C } )
17		df-pr 4180	. . . . . 6 |- { B , D } = ( { B } u. { D } )
18	17	eqcomi 2631	. . . . 5 |- ( { B } u. { D } ) = { B , D }
19	18	a1i 11	. . . 4 |- ( ( ( ( A e. V /\ B e. W ) /\ ( C e. X /\ D e. Y ) ) /\ ( A =/= C /\ B =/= D ) ) -> ( { B } u. { D } ) = { B , D } )
20	13, 16, 19	f1oeq123d 6133	. . 3 |- ( ( ( ( A e. V /\ B e. W ) /\ ( C e. X /\ D e. Y ) ) /\ ( A =/= C /\ B =/= D ) ) -> ( ( { <. A , B >. } u. { <. C , D >. } ) : ( { A } u. { C } ) -1-1-onto-> ( { B } u. { D } ) <-> { <. A , B >. , <. C , D >. } : { A , C } -1-1-onto-> { B , D } ) )
21	10, 20	mpbid 222	. 2 |- ( ( ( ( A e. V /\ B e. W ) /\ ( C e. X /\ D e. Y ) ) /\ ( A =/= C /\ B =/= D ) ) -> { <. A , B >. , <. C , D >. } : { A , C } -1-1-onto-> { B , D } )
22	21	ex 450	1 |- ( ( ( A e. V /\ B e. W ) /\ ( C e. X /\ D e. Y ) ) -> ( ( A =/= C /\ B =/= D ) -> { <. A , B >. , <. C , D >. } : { A , C } -1-1-onto-> { B , D } ) )

Syntax hints:   -> wi 4   /\ wa 384   = wceq 1483   e. wcel 1990   =/= wne 2794   u. cun 3572   i^i cin 3573   (/)c0 3915   {csn 4177   {cpr 4179   <.cop 4183   -1-1-onto->wf1o 5887

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-sep 4781  ax-nul 4789  ax-pr 4906

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-ral 2917  df-rex 2918  df-rab 2921  df-v 3202  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-nul 3916  df-if 4087  df-sn 4178  df-pr 4180  df-op 4184  df-br 4654  df-opab 4713  df-id 5024  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895

This theorem is referenced by:  f1prex  6539  s2f1o  13661  f1oun2prg  13662  symg2bas  17818  poimirlem9  33418  poimirlem15  33424