Theorem ercpbllemg 13412

Description: Lemma for ercpbl 13413. (Contributed by Mario Carneiro, 24-Feb-2015.) (Revised by AV, 12-Jul-2024.)

Hypotheses

Ref	Expression
ercpbl.r	|- ( ph -> .~ Er V )
ercpbl.v	|- ( ph -> V e. W )
ercpbl.f	|- F = ( x e. V |-> [ x ] .~ )
ercpbllem.1	|- ( ph -> A e. V )
ercpbllem.b	|- ( ph -> B e. V )

Assertion

Ref	Expression
ercpbllemg	|- ( ph -> ( ( F ` A ) = ( F ` B ) <-> A .~ B ) )

Distinct variable groups:   x, .~   x, A   x, B   x, V   ph, x

Allowed substitution hints:   F( x)   W( x)

Proof of Theorem ercpbllemg

Step	Hyp	Ref	Expression
1		ercpbl.r	. . . 4 |- ( ph -> .~ Er V )
2		ercpbl.v	. . . 4 |- ( ph -> V e. W )
3		ercpbl.f	. . . 4 |- F = ( x e. V |-> [ x ] .~ )
4		ercpbllem.1	. . . 4 |- ( ph -> A e. V )
5	1, 2, 3, 4	divsfvalg 13411	. . 3 |- ( ph -> ( F ` A ) = [ A ] .~ )
6		ercpbllem.b	. . . 4 |- ( ph -> B e. V )
7	1, 2, 3, 6	divsfvalg 13411	. . 3 |- ( ph -> ( F ` B ) = [ B ] .~ )
8	5, 7	eqeq12d 2246	. 2 |- ( ph -> ( ( F ` A ) = ( F ` B ) <-> [ A ] .~ = [ B ] .~ ) )
9	1, 4	erth 6747	. 2 |- ( ph -> ( A .~ B <-> [ A ] .~ = [ B ] .~ ) )
10	8, 9	bitr4d 191	1 |- ( ph -> ( ( F ` A ) = ( F ` B ) <-> A .~ B ) )

Syntax hints:   -> wi 4   <-> wb 105   = wceq 1397   e. wcel 2202   class class class wbr 4088   |-> cmpt 4150   ` cfv 5326   Er wer 6698   [cec 6699

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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299

This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-v 2804  df-sbc 3032  df-csb 3128  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-br 4089  df-opab 4151  df-mpt 4152  df-id 4390  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-rn 4736  df-res 4737  df-ima 4738  df-iota 5286  df-fun 5328  df-fv 5334  df-er 6701  df-ec 6703

This theorem is referenced by:  ercpbl  13413  erlecpbl  13414