Theorem fliftfun 5791

Description: The function F is the unique function defined by F ` A = B, provided that the well-definedness condition holds. (Contributed by Mario Carneiro, 23-Dec-2016.)

Hypotheses

Ref	Expression
flift.1	|- F = ran ( x e. X |-> <. A , B >. )
flift.2	|- ( ( ph /\ x e. X ) -> A e. R )
flift.3	|- ( ( ph /\ x e. X ) -> B e. S )
fliftfun.4	|- ( x = y -> A = C )
fliftfun.5	|- ( x = y -> B = D )

Assertion

Ref	Expression
fliftfun	|- ( ph -> ( Fun F <-> A. x e. X A. y e. X ( A = C -> B = D ) ) )

Distinct variable groups:   y, A   y, B   x, C   x, y, R   x, D   y, F   ph, x, y   x, X, y   x, S, y

Allowed substitution hints:   A( x)   B( x)   C( y)   D( y)   F( x)

Proof of Theorem fliftfun

Dummy variables v u z are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		nfv 1528	. . 3 |- F/ x ph
2		flift.1	. . . . 5 |- F = ran ( x e. X |-> <. A , B >. )
3		nfmpt1 4093	. . . . . 6 |- F/_ x ( x e. X |-> <. A , B >. )
4	3	nfrn 4868	. . . . 5 |- F/_ x ran ( x e. X |-> <. A , B >. )
5	2, 4	nfcxfr 2316	. . . 4 |- F/_ x F
6	5	nffun 5235	. . 3 |- F/ x Fun F
7		fveq2 5511	. . . . . . 7 |- ( A = C -> ( F ` A ) = ( F ` C ) )
8		simplr 528	. . . . . . . . 9 |- ( ( ( ph /\ Fun F ) /\ ( x e. X /\ y e. X ) ) -> Fun F )
9		flift.2	. . . . . . . . . . 11 |- ( ( ph /\ x e. X ) -> A e. R )
10		flift.3	. . . . . . . . . . 11 |- ( ( ph /\ x e. X ) -> B e. S )
11	2, 9, 10	fliftel1 5789	. . . . . . . . . 10 |- ( ( ph /\ x e. X ) -> A F B )
12	11	ad2ant2r 509	. . . . . . . . 9 |- ( ( ( ph /\ Fun F ) /\ ( x e. X /\ y e. X ) ) -> A F B )
13		funbrfv 5550	. . . . . . . . 9 |- ( Fun F -> ( A F B -> ( F ` A ) = B ) )
14	8, 12, 13	sylc 62	. . . . . . . 8 |- ( ( ( ph /\ Fun F ) /\ ( x e. X /\ y e. X ) ) -> ( F ` A ) = B )
15		simprr 531	. . . . . . . . . . 11 |- ( ( ( ph /\ Fun F ) /\ ( x e. X /\ y e. X ) ) -> y e. X )
16		eqidd 2178	. . . . . . . . . . 11 |- ( ( ( ph /\ Fun F ) /\ ( x e. X /\ y e. X ) ) -> C = C )
17		eqidd 2178	. . . . . . . . . . 11 |- ( ( ( ph /\ Fun F ) /\ ( x e. X /\ y e. X ) ) -> D = D )
18		fliftfun.4	. . . . . . . . . . . . . 14 |- ( x = y -> A = C )
19	18	eqeq2d 2189	. . . . . . . . . . . . 13 |- ( x = y -> ( C = A <-> C = C ) )
20		fliftfun.5	. . . . . . . . . . . . . 14 |- ( x = y -> B = D )
21	20	eqeq2d 2189	. . . . . . . . . . . . 13 |- ( x = y -> ( D = B <-> D = D ) )
22	19, 21	anbi12d 473	. . . . . . . . . . . 12 |- ( x = y -> ( ( C = A /\ D = B ) <-> ( C = C /\ D = D ) ) )
23	22	rspcev 2841	. . . . . . . . . . 11 |- ( ( y e. X /\ ( C = C /\ D = D ) ) -> E. x e. X ( C = A /\ D = B ) )
24	15, 16, 17, 23	syl12anc 1236	. . . . . . . . . 10 |- ( ( ( ph /\ Fun F ) /\ ( x e. X /\ y e. X ) ) -> E. x e. X ( C = A /\ D = B ) )
25	2, 9, 10	fliftel 5788	. . . . . . . . . . 11 |- ( ph -> ( C F D <-> E. x e. X ( C = A /\ D = B ) ) )
26	25	ad2antrr 488	. . . . . . . . . 10 |- ( ( ( ph /\ Fun F ) /\ ( x e. X /\ y e. X ) ) -> ( C F D <-> E. x e. X ( C = A /\ D = B ) ) )
27	24, 26	mpbird 167	. . . . . . . . 9 |- ( ( ( ph /\ Fun F ) /\ ( x e. X /\ y e. X ) ) -> C F D )
28		funbrfv 5550	. . . . . . . . 9 |- ( Fun F -> ( C F D -> ( F ` C ) = D ) )
29	8, 27, 28	sylc 62	. . . . . . . 8 |- ( ( ( ph /\ Fun F ) /\ ( x e. X /\ y e. X ) ) -> ( F ` C ) = D )
30	14, 29	eqeq12d 2192	. . . . . . 7 |- ( ( ( ph /\ Fun F ) /\ ( x e. X /\ y e. X ) ) -> ( ( F ` A ) = ( F ` C ) <-> B = D ) )
31	7, 30	imbitrid 154	. . . . . 6 |- ( ( ( ph /\ Fun F ) /\ ( x e. X /\ y e. X ) ) -> ( A = C -> B = D ) )
32	31	anassrs 400	. . . . 5 |- ( ( ( ( ph /\ Fun F ) /\ x e. X ) /\ y e. X ) -> ( A = C -> B = D ) )
33	32	ralrimiva 2550	. . . 4 |- ( ( ( ph /\ Fun F ) /\ x e. X ) -> A. y e. X ( A = C -> B = D ) )
34	33	exp31 364	. . 3 |- ( ph -> ( Fun F -> ( x e. X -> A. y e. X ( A = C -> B = D ) ) ) )
35	1, 6, 34	ralrimd 2555	. 2 |- ( ph -> ( Fun F -> A. x e. X A. y e. X ( A = C -> B = D ) ) )
36	2, 9, 10	fliftel 5788	. . . . . . . . 9 |- ( ph -> ( z F u <-> E. x e. X ( z = A /\ u = B ) ) )
37	2, 9, 10	fliftel 5788	. . . . . . . . . 10 |- ( ph -> ( z F v <-> E. x e. X ( z = A /\ v = B ) ) )
38	18	eqeq2d 2189	. . . . . . . . . . . 12 |- ( x = y -> ( z = A <-> z = C ) )
39	20	eqeq2d 2189	. . . . . . . . . . . 12 |- ( x = y -> ( v = B <-> v = D ) )
40	38, 39	anbi12d 473	. . . . . . . . . . 11 |- ( x = y -> ( ( z = A /\ v = B ) <-> ( z = C /\ v = D ) ) )
41	40	cbvrexv 2704	. . . . . . . . . 10 |- ( E. x e. X ( z = A /\ v = B ) <-> E. y e. X ( z = C /\ v = D ) )
42	37, 41	bitrdi 196	. . . . . . . . 9 |- ( ph -> ( z F v <-> E. y e. X ( z = C /\ v = D ) ) )
43	36, 42	anbi12d 473	. . . . . . . 8 |- ( ph -> ( ( z F u /\ z F v ) <-> ( E. x e. X ( z = A /\ u = B ) /\ E. y e. X ( z = C /\ v = D ) ) ) )
44	43	biimpd 144	. . . . . . 7 |- ( ph -> ( ( z F u /\ z F v ) -> ( E. x e. X ( z = A /\ u = B ) /\ E. y e. X ( z = C /\ v = D ) ) ) )
45		reeanv 2646	. . . . . . . 8 |- ( E. x e. X E. y e. X ( ( z = A /\ u = B ) /\ ( z = C /\ v = D ) ) <-> ( E. x e. X ( z = A /\ u = B ) /\ E. y e. X ( z = C /\ v = D ) ) )
46		r19.29 2614	. . . . . . . . . 10 |- ( ( A. x e. X A. y e. X ( A = C -> B = D ) /\ E. x e. X E. y e. X ( ( z = A /\ u = B ) /\ ( z = C /\ v = D ) ) ) -> E. x e. X ( A. y e. X ( A = C -> B = D ) /\ E. y e. X ( ( z = A /\ u = B ) /\ ( z = C /\ v = D ) ) ) )
47		r19.29 2614	. . . . . . . . . . . 12 |- ( ( A. y e. X ( A = C -> B = D ) /\ E. y e. X ( ( z = A /\ u = B ) /\ ( z = C /\ v = D ) ) ) -> E. y e. X ( ( A = C -> B = D ) /\ ( ( z = A /\ u = B ) /\ ( z = C /\ v = D ) ) ) )
48		eqtr2 2196	. . . . . . . . . . . . . . . . 17 |- ( ( z = A /\ z = C ) -> A = C )
49	48	ad2ant2r 509	. . . . . . . . . . . . . . . 16 |- ( ( ( z = A /\ u = B ) /\ ( z = C /\ v = D ) ) -> A = C )
50	49	imim1i 60	. . . . . . . . . . . . . . 15 |- ( ( A = C -> B = D ) -> ( ( ( z = A /\ u = B ) /\ ( z = C /\ v = D ) ) -> B = D ) )
51	50	imp 124	. . . . . . . . . . . . . 14 |- ( ( ( A = C -> B = D ) /\ ( ( z = A /\ u = B ) /\ ( z = C /\ v = D ) ) ) -> B = D )
52		simprlr 538	. . . . . . . . . . . . . 14 |- ( ( ( A = C -> B = D ) /\ ( ( z = A /\ u = B ) /\ ( z = C /\ v = D ) ) ) -> u = B )
53		simprrr 540	. . . . . . . . . . . . . 14 |- ( ( ( A = C -> B = D ) /\ ( ( z = A /\ u = B ) /\ ( z = C /\ v = D ) ) ) -> v = D )
54	51, 52, 53	3eqtr4d 2220	. . . . . . . . . . . . 13 |- ( ( ( A = C -> B = D ) /\ ( ( z = A /\ u = B ) /\ ( z = C /\ v = D ) ) ) -> u = v )
55	54	rexlimivw 2590	. . . . . . . . . . . 12 |- ( E. y e. X ( ( A = C -> B = D ) /\ ( ( z = A /\ u = B ) /\ ( z = C /\ v = D ) ) ) -> u = v )
56	47, 55	syl 14	. . . . . . . . . . 11 |- ( ( A. y e. X ( A = C -> B = D ) /\ E. y e. X ( ( z = A /\ u = B ) /\ ( z = C /\ v = D ) ) ) -> u = v )
57	56	rexlimivw 2590	. . . . . . . . . 10 |- ( E. x e. X ( A. y e. X ( A = C -> B = D ) /\ E. y e. X ( ( z = A /\ u = B ) /\ ( z = C /\ v = D ) ) ) -> u = v )
58	46, 57	syl 14	. . . . . . . . 9 |- ( ( A. x e. X A. y e. X ( A = C -> B = D ) /\ E. x e. X E. y e. X ( ( z = A /\ u = B ) /\ ( z = C /\ v = D ) ) ) -> u = v )
59	58	ex 115	. . . . . . . 8 |- ( A. x e. X A. y e. X ( A = C -> B = D ) -> ( E. x e. X E. y e. X ( ( z = A /\ u = B ) /\ ( z = C /\ v = D ) ) -> u = v ) )
60	45, 59	biimtrrid 153	. . . . . . 7 |- ( A. x e. X A. y e. X ( A = C -> B = D ) -> ( ( E. x e. X ( z = A /\ u = B ) /\ E. y e. X ( z = C /\ v = D ) ) -> u = v ) )
61	44, 60	syl9 72	. . . . . 6 |- ( ph -> ( A. x e. X A. y e. X ( A = C -> B = D ) -> ( ( z F u /\ z F v ) -> u = v ) ) )
62	61	alrimdv 1876	. . . . 5 |- ( ph -> ( A. x e. X A. y e. X ( A = C -> B = D ) -> A. v ( ( z F u /\ z F v ) -> u = v ) ) )
63	62	alrimdv 1876	. . . 4 |- ( ph -> ( A. x e. X A. y e. X ( A = C -> B = D ) -> A. u A. v ( ( z F u /\ z F v ) -> u = v ) ) )
64	63	alrimdv 1876	. . 3 |- ( ph -> ( A. x e. X A. y e. X ( A = C -> B = D ) -> A. z A. u A. v ( ( z F u /\ z F v ) -> u = v ) ) )
65	2, 9, 10	fliftrel 5787	. . . . 5 |- ( ph -> F C_ ( R X. S ) )
66		relxp 4732	. . . . 5 |- Rel ( R X. S )
67		relss 4710	. . . . 5 |- ( F C_ ( R X. S ) -> ( Rel ( R X. S ) -> Rel F ) )
68	65, 66, 67	mpisyl 1446	. . . 4 |- ( ph -> Rel F )
69		dffun2 5222	. . . . 5 |- ( Fun F <-> ( Rel F /\ A. z A. u A. v ( ( z F u /\ z F v ) -> u = v ) ) )
70	69	baib 919	. . . 4 |- ( Rel F -> ( Fun F <-> A. z A. u A. v ( ( z F u /\ z F v ) -> u = v ) ) )
71	68, 70	syl 14	. . 3 |- ( ph -> ( Fun F <-> A. z A. u A. v ( ( z F u /\ z F v ) -> u = v ) ) )
72	64, 71	sylibrd 169	. 2 |- ( ph -> ( A. x e. X A. y e. X ( A = C -> B = D ) -> Fun F ) )
73	35, 72	impbid 129	1 |- ( ph -> ( Fun F <-> A. x e. X A. y e. X ( A = C -> B = D ) ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   A.wal 1351   = wceq 1353   e. wcel 2148   A.wral 2455   E.wrex 2456   C_ wss 3129   <.cop 3594   class class class wbr 4000   |-> cmpt 4061   X. cxp 4621   ran crn 4624   Rel wrel 4628   Fun wfun 5206   ` cfv 5212

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 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-14 2151  ax-ext 2159  ax-sep 4118  ax-pow 4171  ax-pr 4206

This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-nf 1461  df-sb 1763  df-eu 2029  df-mo 2030  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ral 2460  df-rex 2461  df-rab 2464  df-v 2739  df-sbc 2963  df-csb 3058  df-un 3133  df-in 3135  df-ss 3142  df-pw 3576  df-sn 3597  df-pr 3598  df-op 3600  df-uni 3808  df-br 4001  df-opab 4062  df-mpt 4063  df-id 4290  df-xp 4629  df-rel 4630  df-cnv 4631  df-co 4632  df-dm 4633  df-rn 4634  df-res 4635  df-ima 4636  df-iota 5174  df-fun 5214  df-fn 5215  df-f 5216  df-fv 5220

This theorem is referenced by:  fliftfund  5792  fliftfuns  5793  qliftfun  6611