Theorem curry1 6891

Description: Composition with `' ( 2nd |` ( { C } X. _V ) ) turns any binary operation F with a constant first operand into a function G of the second operand only. This transformation is called "currying." (Contributed by NM, 28-Mar-2008.) (Revised by Mario Carneiro, 26-Dec-2014.)

Hypothesis

Ref	Expression
curry1.1	|- G = ( F o. `' ( 2nd |` ( { C } X. _V ) ) )

Assertion

Ref	Expression
curry1	|- ( ( F Fn ( A X. B ) /\ C e. A ) -> G = ( x e. B |-> ( C F x ) ) )

Distinct variable groups:   x, A   x, B   x, C   x, F   x, G

Proof of Theorem curry1

Step	Hyp	Ref	Expression
1		fnfun 5684	. . . . 5 |- ( F Fn ( A X. B ) -> Fun F )
2		2ndconst 6888	. . . . . 6 |- ( C e. A -> ( 2nd |` ( { C } X. _V ) ) : ( { C } X. _V ) -1-1-onto-> _V )
3		dff1o3 5828	. . . . . . 7 |- ( ( 2nd |` ( { C } X. _V ) ) : ( { C } X. _V ) -1-1-onto-> _V <-> ( ( 2nd |` ( { C } X. _V ) ) : ( { C } X. _V ) -onto-> _V /\ Fun `' ( 2nd |` ( { C } X. _V ) ) ) )
4	3	simprbi 464	. . . . . 6 |- ( ( 2nd |` ( { C } X. _V ) ) : ( { C } X. _V ) -1-1-onto-> _V -> Fun `' ( 2nd |` ( { C } X. _V ) ) )
5	2, 4	syl 16	. . . . 5 |- ( C e. A -> Fun `' ( 2nd |` ( { C } X. _V ) ) )
6		funco 5632	. . . . 5 |- ( ( Fun F /\ Fun `' ( 2nd |` ( { C } X. _V ) ) ) -> Fun ( F o. `' ( 2nd |` ( { C } X. _V ) ) ) )
7	1, 5, 6	syl2an 477	. . . 4 |- ( ( F Fn ( A X. B ) /\ C e. A ) -> Fun ( F o. `' ( 2nd |` ( { C } X. _V ) ) ) )
8		dmco 5521	. . . . 5 |- dom ( F o. `' ( 2nd |` ( { C } X. _V ) ) ) = ( `' `' ( 2nd |` ( { C } X. _V ) ) " dom F )
9		fndm 5686	. . . . . . . 8 |- ( F Fn ( A X. B ) -> dom F = ( A X. B ) )
10	9	adantr 465	. . . . . . 7 |- ( ( F Fn ( A X. B ) /\ C e. A ) -> dom F = ( A X. B ) )
11	10	imaeq2d 5347	. . . . . 6 |- ( ( F Fn ( A X. B ) /\ C e. A ) -> ( `' `' ( 2nd |` ( { C } X. _V ) ) " dom F ) = ( `' `' ( 2nd |` ( { C } X. _V ) ) " ( A X. B ) ) )
12		imacnvcnv 5478	. . . . . . . . 9 |- ( `' `' ( 2nd |` ( { C } X. _V ) ) " ( A X. B ) ) = ( ( 2nd |` ( { C } X. _V ) ) " ( A X. B ) )
13		df-ima 5021	. . . . . . . . 9 |- ( ( 2nd |` ( { C } X. _V ) ) " ( A X. B ) ) = ran ( ( 2nd |` ( { C } X. _V ) ) |` ( A X. B ) )
14		resres 5296	. . . . . . . . . 10 |- ( ( 2nd |` ( { C } X. _V ) ) |` ( A X. B ) ) = ( 2nd |` ( ( { C } X. _V ) i^i ( A X. B ) ) )
15	14	rneqi 5239	. . . . . . . . 9 |- ran ( ( 2nd |` ( { C } X. _V ) ) |` ( A X. B ) ) = ran ( 2nd |` ( ( { C } X. _V ) i^i ( A X. B ) ) )
16	12, 13, 15	3eqtri 2490	. . . . . . . 8 |- ( `' `' ( 2nd |` ( { C } X. _V ) ) " ( A X. B ) ) = ran ( 2nd |` ( ( { C } X. _V ) i^i ( A X. B ) ) )
17		inxp 5145	. . . . . . . . . . . . 13 |- ( ( { C } X. _V ) i^i ( A X. B ) ) = ( ( { C } i^i A ) X. ( _V i^i B ) )
18		incom 3687	. . . . . . . . . . . . . . 15 |- ( _V i^i B ) = ( B i^i _V )
19		inv1 3821	. . . . . . . . . . . . . . 15 |- ( B i^i _V ) = B
20	18, 19	eqtri 2486	. . . . . . . . . . . . . 14 |- ( _V i^i B ) = B
21	20	xpeq2i 5029	. . . . . . . . . . . . 13 |- ( ( { C } i^i A ) X. ( _V i^i B ) ) = ( ( { C } i^i A ) X. B )
22	17, 21	eqtri 2486	. . . . . . . . . . . 12 |- ( ( { C } X. _V ) i^i ( A X. B ) ) = ( ( { C } i^i A ) X. B )
23		snssi 4176	. . . . . . . . . . . . . 14 |- ( C e. A -> { C } C_ A )
24		df-ss 3485	. . . . . . . . . . . . . 14 |- ( { C } C_ A <-> ( { C } i^i A ) = { C } )
25	23, 24	sylib 196	. . . . . . . . . . . . 13 |- ( C e. A -> ( { C } i^i A ) = { C } )
26	25	xpeq1d 5031	. . . . . . . . . . . 12 |- ( C e. A -> ( ( { C } i^i A ) X. B ) = ( { C } X. B ) )
27	22, 26	syl5eq 2510	. . . . . . . . . . 11 |- ( C e. A -> ( ( { C } X. _V ) i^i ( A X. B ) ) = ( { C } X. B ) )
28	27	reseq2d 5283	. . . . . . . . . 10 |- ( C e. A -> ( 2nd |` ( ( { C } X. _V ) i^i ( A X. B ) ) ) = ( 2nd |` ( { C } X. B ) ) )
29	28	rneqd 5240	. . . . . . . . 9 |- ( C e. A -> ran ( 2nd |` ( ( { C } X. _V ) i^i ( A X. B ) ) ) = ran ( 2nd |` ( { C } X. B ) ) )
30		2ndconst 6888	. . . . . . . . . 10 |- ( C e. A -> ( 2nd |` ( { C } X. B ) ) : ( { C } X. B ) -1-1-onto-> B )
31		f1ofo 5829	. . . . . . . . . 10 |- ( ( 2nd |` ( { C } X. B ) ) : ( { C } X. B ) -1-1-onto-> B -> ( 2nd |` ( { C } X. B ) ) : ( { C } X. B ) -onto-> B )
32		forn 5804	. . . . . . . . . 10 |- ( ( 2nd |` ( { C } X. B ) ) : ( { C } X. B ) -onto-> B -> ran ( 2nd |` ( { C } X. B ) ) = B )
33	30, 31, 32	3syl 20	. . . . . . . . 9 |- ( C e. A -> ran ( 2nd |` ( { C } X. B ) ) = B )
34	29, 33	eqtrd 2498	. . . . . . . 8 |- ( C e. A -> ran ( 2nd |` ( ( { C } X. _V ) i^i ( A X. B ) ) ) = B )
35	16, 34	syl5eq 2510	. . . . . . 7 |- ( C e. A -> ( `' `' ( 2nd |` ( { C } X. _V ) ) " ( A X. B ) ) = B )
36	35	adantl 466	. . . . . 6 |- ( ( F Fn ( A X. B ) /\ C e. A ) -> ( `' `' ( 2nd |` ( { C } X. _V ) ) " ( A X. B ) ) = B )
37	11, 36	eqtrd 2498	. . . . 5 |- ( ( F Fn ( A X. B ) /\ C e. A ) -> ( `' `' ( 2nd |` ( { C } X. _V ) ) " dom F ) = B )
38	8, 37	syl5eq 2510	. . . 4 |- ( ( F Fn ( A X. B ) /\ C e. A ) -> dom ( F o. `' ( 2nd |` ( { C } X. _V ) ) ) = B )
39		curry1.1	. . . . . 6 |- G = ( F o. `' ( 2nd |` ( { C } X. _V ) ) )
40	39	fneq1i 5681	. . . . 5 |- ( G Fn B <-> ( F o. `' ( 2nd |` ( { C } X. _V ) ) ) Fn B )
41		df-fn 5597	. . . . 5 |- ( ( F o. `' ( 2nd |` ( { C } X. _V ) ) ) Fn B <-> ( Fun ( F o. `' ( 2nd |` ( { C } X. _V ) ) ) /\ dom ( F o. `' ( 2nd |` ( { C } X. _V ) ) ) = B ) )
42	40, 41	bitri 249	. . . 4 |- ( G Fn B <-> ( Fun ( F o. `' ( 2nd |` ( { C } X. _V ) ) ) /\ dom ( F o. `' ( 2nd |` ( { C } X. _V ) ) ) = B ) )
43	7, 38, 42	sylanbrc 664	. . 3 |- ( ( F Fn ( A X. B ) /\ C e. A ) -> G Fn B )
44		dffn5 5918	. . 3 |- ( G Fn B <-> G = ( x e. B |-> ( G ` x ) ) )
45	43, 44	sylib 196	. 2 |- ( ( F Fn ( A X. B ) /\ C e. A ) -> G = ( x e. B |-> ( G ` x ) ) )
46	39	fveq1i 5873	. . . . 5 |- ( G ` x ) = ( ( F o. `' ( 2nd |` ( { C } X. _V ) ) ) ` x )
47		dff1o4 5830	. . . . . . . . 9 |- ( ( 2nd |` ( { C } X. _V ) ) : ( { C } X. _V ) -1-1-onto-> _V <-> ( ( 2nd |` ( { C } X. _V ) ) Fn ( { C } X. _V ) /\ `' ( 2nd |` ( { C } X. _V ) ) Fn _V ) )
48	2, 47	sylib 196	. . . . . . . 8 |- ( C e. A -> ( ( 2nd |` ( { C } X. _V ) ) Fn ( { C } X. _V ) /\ `' ( 2nd |` ( { C } X. _V ) ) Fn _V ) )
49	48	simprd 463	. . . . . . 7 |- ( C e. A -> `' ( 2nd |` ( { C } X. _V ) ) Fn _V )
50		vex 3112	. . . . . . . 8 |- x e. _V
51		fvco2 5948	. . . . . . . 8 |- ( ( `' ( 2nd |` ( { C } X. _V ) ) Fn _V /\ x e. _V ) -> ( ( F o. `' ( 2nd |` ( { C } X. _V ) ) ) ` x ) = ( F ` ( `' ( 2nd |` ( { C } X. _V ) ) ` x ) ) )
52	50, 51	mpan2 671	. . . . . . 7 |- ( `' ( 2nd |` ( { C } X. _V ) ) Fn _V -> ( ( F o. `' ( 2nd |` ( { C } X. _V ) ) ) ` x ) = ( F ` ( `' ( 2nd |` ( { C } X. _V ) ) ` x ) ) )
53	49, 52	syl 16	. . . . . 6 |- ( C e. A -> ( ( F o. `' ( 2nd |` ( { C } X. _V ) ) ) ` x ) = ( F ` ( `' ( 2nd |` ( { C } X. _V ) ) ` x ) ) )
54	53	ad2antlr 726	. . . . 5 |- ( ( ( F Fn ( A X. B ) /\ C e. A ) /\ x e. B ) -> ( ( F o. `' ( 2nd |` ( { C } X. _V ) ) ) ` x ) = ( F ` ( `' ( 2nd |` ( { C } X. _V ) ) ` x ) ) )
55	46, 54	syl5eq 2510	. . . 4 |- ( ( ( F Fn ( A X. B ) /\ C e. A ) /\ x e. B ) -> ( G ` x ) = ( F ` ( `' ( 2nd |` ( { C } X. _V ) ) ` x ) ) )
56	2	adantr 465	. . . . . . . . 9 |- ( ( C e. A /\ x e. B ) -> ( 2nd |` ( { C } X. _V ) ) : ( { C } X. _V ) -1-1-onto-> _V )
57		snidg 4058	. . . . . . . . . . . 12 |- ( C e. A -> C e. { C } )
58	57, 50	jctir 538	. . . . . . . . . . 11 |- ( C e. A -> ( C e. { C } /\ x e. _V ) )
59		opelxp 5038	. . . . . . . . . . 11 |- ( <. C , x >. e. ( { C } X. _V ) <-> ( C e. { C } /\ x e. _V ) )
60	58, 59	sylibr 212	. . . . . . . . . 10 |- ( C e. A -> <. C , x >. e. ( { C } X. _V ) )
61	60	adantr 465	. . . . . . . . 9 |- ( ( C e. A /\ x e. B ) -> <. C , x >. e. ( { C } X. _V ) )
62	56, 61	jca 532	. . . . . . . 8 |- ( ( C e. A /\ x e. B ) -> ( ( 2nd |` ( { C } X. _V ) ) : ( { C } X. _V ) -1-1-onto-> _V /\ <. C , x >. e. ( { C } X. _V ) ) )
63		fvres 5886	. . . . . . . . . . 11 |- ( <. C , x >. e. ( { C } X. _V ) -> ( ( 2nd |` ( { C } X. _V ) ) ` <. C , x >. ) = ( 2nd ` <. C , x >. ) )
64	60, 63	syl 16	. . . . . . . . . 10 |- ( C e. A -> ( ( 2nd |` ( { C } X. _V ) ) ` <. C , x >. ) = ( 2nd ` <. C , x >. ) )
65		op2ndg 6812	. . . . . . . . . . 11 |- ( ( C e. A /\ x e. _V ) -> ( 2nd ` <. C , x >. ) = x )
66	50, 65	mpan2 671	. . . . . . . . . 10 |- ( C e. A -> ( 2nd ` <. C , x >. ) = x )
67	64, 66	eqtrd 2498	. . . . . . . . 9 |- ( C e. A -> ( ( 2nd |` ( { C } X. _V ) ) ` <. C , x >. ) = x )
68	67	adantr 465	. . . . . . . 8 |- ( ( C e. A /\ x e. B ) -> ( ( 2nd |` ( { C } X. _V ) ) ` <. C , x >. ) = x )
69		f1ocnvfv 6185	. . . . . . . 8 |- ( ( ( 2nd |` ( { C } X. _V ) ) : ( { C } X. _V ) -1-1-onto-> _V /\ <. C , x >. e. ( { C } X. _V ) ) -> ( ( ( 2nd |` ( { C } X. _V ) ) ` <. C , x >. ) = x -> ( `' ( 2nd |` ( { C } X. _V ) ) ` x ) = <. C , x >. ) )
70	62, 68, 69	sylc 60	. . . . . . 7 |- ( ( C e. A /\ x e. B ) -> ( `' ( 2nd |` ( { C } X. _V ) ) ` x ) = <. C , x >. )
71	70	fveq2d 5876	. . . . . 6 |- ( ( C e. A /\ x e. B ) -> ( F ` ( `' ( 2nd |` ( { C } X. _V ) ) ` x ) ) = ( F ` <. C , x >. ) )
72	71	adantll 713	. . . . 5 |- ( ( ( F Fn ( A X. B ) /\ C e. A ) /\ x e. B ) -> ( F ` ( `' ( 2nd |` ( { C } X. _V ) ) ` x ) ) = ( F ` <. C , x >. ) )
73		df-ov 6299	. . . . 5 |- ( C F x ) = ( F ` <. C , x >. )
74	72, 73	syl6eqr 2516	. . . 4 |- ( ( ( F Fn ( A X. B ) /\ C e. A ) /\ x e. B ) -> ( F ` ( `' ( 2nd |` ( { C } X. _V ) ) ` x ) ) = ( C F x ) )
75	55, 74	eqtrd 2498	. . 3 |- ( ( ( F Fn ( A X. B ) /\ C e. A ) /\ x e. B ) -> ( G ` x ) = ( C F x ) )
76	75	mpteq2dva 4543	. 2 |- ( ( F Fn ( A X. B ) /\ C e. A ) -> ( x e. B |-> ( G ` x ) ) = ( x e. B |-> ( C F x ) ) )
77	45, 76	eqtrd 2498	1 |- ( ( F Fn ( A X. B ) /\ C e. A ) -> G = ( x e. B |-> ( C F x ) ) )

Syntax hints:   -> wi 4   /\ wa 369   = wceq 1395   e. wcel 1819   _Vcvv 3109   i^i cin 3470   C_ wss 3471   {csn 4032   <.cop 4038   |-> cmpt 4515   X. cxp 5006   `'ccnv 5007   dom cdm 5008   ran crn 5009   |` cres 5010   "cima 5011   o. ccom 5012   Fun wfun 5588   Fn wfn 5589   -onto->wfo 5592   -1-1-onto->wf1o 5593   ` cfv 5594  (class class class)co 6296   2ndc2nd 6798

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1619  ax-4 1632  ax-5 1705  ax-6 1748  ax-7 1791  ax-8 1821  ax-9 1823  ax-10 1838  ax-11 1843  ax-12 1855  ax-13 2000  ax-ext 2435  ax-sep 4578  ax-nul 4586  ax-pow 4634  ax-pr 4695  ax-un 6591

This theorem depends on definitions:  df-bi 185  df-or 370  df-an 371  df-3an 975  df-tru 1398  df-ex 1614  df-nf 1618  df-sb 1741  df-eu 2287  df-mo 2288  df-clab 2443  df-cleq 2449  df-clel 2452  df-nfc 2607  df-ne 2654  df-ral 2812  df-rex 2813  df-rab 2816  df-v 3111  df-sbc 3328  df-csb 3431  df-dif 3474  df-un 3476  df-in 3478  df-ss 3485  df-nul 3794  df-if 3945  df-sn 4033  df-pr 4035  df-op 4039  df-uni 4252  df-iun 4334  df-br 4457  df-opab 4516  df-mpt 4517  df-id 4804  df-xp 5014  df-rel 5015  df-cnv 5016  df-co 5017  df-dm 5018  df-rn 5019  df-res 5020  df-ima 5021  df-iota 5557  df-fun 5596  df-fn 5597  df-f 5598  df-f1 5599  df-fo 5600  df-f1o 5601  df-fv 5602  df-ov 6299  df-1st 6799  df-2nd 6800

This theorem is referenced by:  curry1val  6892  curry1f  6893