Theorem fncnv 5442

Description: Single-rootedness (see funcnv 5437) of a class cut down by a cross product. (Contributed by NM, 5-Mar-2007.)

Assertion

Ref	Expression
fncnv	|- ( `' ( R i^i ( A X. B ) ) Fn B <-> A. y e. B E! x e. A x R y )

Distinct variable groups:   x, y, A   x, B, y   x, R, y

Proof of Theorem fncnv

Step	Hyp	Ref	Expression
1		df-fn 5375	. 2 |- ( `' ( R i^i ( A X. B ) ) Fn B <-> ( Fun `' ( R i^i ( A X. B ) ) /\ dom `' ( R i^i ( A X. B ) ) = B ) )
2		df-rn 4780	. . . 4 |- ran ( R i^i ( A X. B ) ) = dom `' ( R i^i ( A X. B ) )
3	2	eqeq1i 2246	. . 3 |- ( ran ( R i^i ( A X. B ) ) = B <-> dom `' ( R i^i ( A X. B ) ) = B )
4	3	anbi2i 461	. 2 |- ( ( Fun `' ( R i^i ( A X. B ) ) /\ ran ( R i^i ( A X. B ) ) = B ) <-> ( Fun `' ( R i^i ( A X. B ) ) /\ dom `' ( R i^i ( A X. B ) ) = B ) )
5		rninxp 5226	. . . . 5 |- ( ran ( R i^i ( A X. B ) ) = B <-> A. y e. B E. x e. A x R y )
6	5	anbi1i 462	. . . 4 |- ( ( ran ( R i^i ( A X. B ) ) = B /\ A. y e. B E* x e. A x R y ) <-> ( A. y e. B E. x e. A x R y /\ A. y e. B E* x e. A x R y ) )
7		funcnv 5437	. . . . . 6 |- ( Fun `' ( R i^i ( A X. B ) ) <-> A. y e. ran ( R i^i ( A X. B ) ) E* x x ( R i^i ( A X. B ) ) y )
8		raleq 2749	. . . . . . 7 |- ( ran ( R i^i ( A X. B ) ) = B -> ( A. y e. ran ( R i^i ( A X. B ) ) E* x x ( R i^i ( A X. B ) ) y <-> A. y e. B E* x x ( R i^i ( A X. B ) ) y ) )
9		moanimv 2162	. . . . . . . . . 10 |- ( E* x ( y e. B /\ ( x e. A /\ x R y ) ) <-> ( y e. B -> E* x ( x e. A /\ x R y ) ) )
10		brinxp2 4837	. . . . . . . . . . . 12 |- ( x ( R i^i ( A X. B ) ) y <-> ( x e. A /\ y e. B /\ x R y ) )
11		3anan12 1021	. . . . . . . . . . . 12 |- ( ( x e. A /\ y e. B /\ x R y ) <-> ( y e. B /\ ( x e. A /\ x R y ) ) )
12	10, 11	bitri 184	. . . . . . . . . . 11 |- ( x ( R i^i ( A X. B ) ) y <-> ( y e. B /\ ( x e. A /\ x R y ) ) )
13	12	mobii 2123	. . . . . . . . . 10 |- ( E* x x ( R i^i ( A X. B ) ) y <-> E* x ( y e. B /\ ( x e. A /\ x R y ) ) )
14		df-rmo 2536	. . . . . . . . . . 11 |- ( E* x e. A x R y <-> E* x ( x e. A /\ x R y ) )
15	14	imbi2i 226	. . . . . . . . . 10 |- ( ( y e. B -> E* x e. A x R y ) <-> ( y e. B -> E* x ( x e. A /\ x R y ) ) )
16	9, 13, 15	3bitr4i 212	. . . . . . . . 9 |- ( E* x x ( R i^i ( A X. B ) ) y <-> ( y e. B -> E* x e. A x R y ) )
17		biimt 241	. . . . . . . . 9 |- ( y e. B -> ( E* x e. A x R y <-> ( y e. B -> E* x e. A x R y ) ) )
18	16, 17	bitr4id 199	. . . . . . . 8 |- ( y e. B -> ( E* x x ( R i^i ( A X. B ) ) y <-> E* x e. A x R y ) )
19	18	ralbiia 2564	. . . . . . 7 |- ( A. y e. B E* x x ( R i^i ( A X. B ) ) y <-> A. y e. B E* x e. A x R y )
20	8, 19	bitrdi 196	. . . . . 6 |- ( ran ( R i^i ( A X. B ) ) = B -> ( A. y e. ran ( R i^i ( A X. B ) ) E* x x ( R i^i ( A X. B ) ) y <-> A. y e. B E* x e. A x R y ) )
21	7, 20	bitrid 192	. . . . 5 |- ( ran ( R i^i ( A X. B ) ) = B -> ( Fun `' ( R i^i ( A X. B ) ) <-> A. y e. B E* x e. A x R y ) )
22	21	pm5.32i 458	. . . 4 |- ( ( ran ( R i^i ( A X. B ) ) = B /\ Fun `' ( R i^i ( A X. B ) ) ) <-> ( ran ( R i^i ( A X. B ) ) = B /\ A. y e. B E* x e. A x R y ) )
23		r19.26 2677	. . . 4 |- ( A. y e. B ( E. x e. A x R y /\ E* x e. A x R y ) <-> ( A. y e. B E. x e. A x R y /\ A. y e. B E* x e. A x R y ) )
24	6, 22, 23	3bitr4i 212	. . 3 |- ( ( ran ( R i^i ( A X. B ) ) = B /\ Fun `' ( R i^i ( A X. B ) ) ) <-> A. y e. B ( E. x e. A x R y /\ E* x e. A x R y ) )
25		ancom 266	. . 3 |- ( ( Fun `' ( R i^i ( A X. B ) ) /\ ran ( R i^i ( A X. B ) ) = B ) <-> ( ran ( R i^i ( A X. B ) ) = B /\ Fun `' ( R i^i ( A X. B ) ) ) )
26		reu5 2770	. . . 4 |- ( E! x e. A x R y <-> ( E. x e. A x R y /\ E* x e. A x R y ) )
27	26	ralbii 2556	. . 3 |- ( A. y e. B E! x e. A x R y <-> A. y e. B ( E. x e. A x R y /\ E* x e. A x R y ) )
28	24, 25, 27	3bitr4i 212	. 2 |- ( ( Fun `' ( R i^i ( A X. B ) ) /\ ran ( R i^i ( A X. B ) ) = B ) <-> A. y e. B E! x e. A x R y )
29	1, 4, 28	3bitr2i 208	1 |- ( `' ( R i^i ( A X. B ) ) Fn B <-> A. y e. B E! x e. A x R y )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   /\ w3a 1009   = wceq 1402   E*wmo 2087   e. wcel 2209   A.wral 2528   E.wrex 2529   E!wreu 2530   E*wrmo 2531   i^i cin 3219   class class class wbr 4125   X. cxp 4767   `'ccnv 4768   dom cdm 4769   ran crn 4770   Fun wfun 5366   Fn wfn 5367

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 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 4244  ax-pow 4306  ax-pr 4341

This theorem 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-reu 2535  df-rmo 2536  df-v 2823  df-un 3224  df-in 3226  df-ss 3233  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-br 4126  df-opab 4188  df-id 4433  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-rn 4780  df-res 4781  df-ima 4782  df-fun 5374  df-fn 5375

This theorem is referenced by: (None)