Theorem rmoeq1f 2807

Description: Equality theorem for restricted uniqueness quantifier, with bound-variable hypotheses instead of distinct variable restrictions. (Contributed by Alexander van der Vekens, 17-Jun-2017.)

Hypotheses

Ref	Expression
raleq1f.1	|- F/_xA
raleq1f.2	|- F/_xB

Assertion

Ref	Expression
rmoeq1f	|- (A = B -> (E*x e. A ph <-> E*x e. B ph))

Proof of Theorem rmoeq1f

Step	Hyp	Ref	Expression
1		raleq1f.1	. . . 4 |- F/_xA
2		raleq1f.2	. . . 4 |- F/_xB
3	1, 2	nfeq 2497	. . 3 |- F/x A = B
4		eleq2 2414	. . . 4 |- (A = B -> (x e. A <-> x e. B))
5	4	anbi1d 685	. . 3 |- (A = B -> ((x e. A /\ ph) <-> (x e. B /\ ph)))
6	3, 5	mobid 2238	. 2 |- (A = B -> (E*x(x e. A /\ ph) <-> E*x(x e. B /\ ph)))
7		df-rmo 2623	. 2 |- (E*x e. A ph <-> E*x(x e. A /\ ph))
8		df-rmo 2623	. 2 |- (E*x e. B ph <-> E*x(x e. B /\ ph))
9	6, 7, 8	3bitr4g 279	1 |- (A = B -> (E*x e. A ph <-> E*x e. B ph))

Syntax hints:   -> wi 4   <-> wb 176   /\ wa 358   = wceq 1642   e. wcel 1710  E*wmo 2205   F/_wnfc 2477  E*wrmo 2618

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1546  ax-5 1557  ax-17 1616  ax-9 1654  ax-8 1675  ax-6 1729  ax-7 1734  ax-11 1746  ax-12 1925  ax-ext 2334

This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-tru 1319  df-ex 1542  df-nf 1545  df-sb 1649  df-eu 2208  df-mo 2209  df-cleq 2346  df-clel 2349  df-nfc 2479  df-rmo 2623

This theorem is referenced by:  rmoeq1  2811