Theorem eqbrrdiv 4757

Description: Deduction from extensionality principle for relations. (Contributed by Rodolfo Medina, 10-Oct-2010.)

Hypotheses

Ref	Expression
eqbrrdiv.1	|- Rel A
eqbrrdiv.2	|- Rel B
eqbrrdiv.3	|- ( ph -> ( x A y <-> x B y ) )

Assertion

Ref	Expression
eqbrrdiv	|- ( ph -> A = B )

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

Proof of Theorem eqbrrdiv

Step	Hyp	Ref	Expression
1		eqbrrdiv.1	. 2 |- Rel A
2		eqbrrdiv.2	. 2 |- Rel B
3		eqbrrdiv.3	. . 3 |- ( ph -> ( x A y <-> x B y ) )
4		df-br 4030	. . 3 |- ( x A y <-> <. x , y >. e. A )
5		df-br 4030	. . 3 |- ( x B y <-> <. x , y >. e. B )
6	3, 4, 5	3bitr3g 222	. 2 |- ( ph -> ( <. x , y >. e. A <-> <. x , y >. e. B ) )
7	1, 2, 6	eqrelrdv 4755	1 |- ( ph -> A = B )

Syntax hints:   -> wi 4   <-> wb 105   = wceq 1364   e. wcel 2164   <.cop 3621   class class class wbr 4029   Rel wrel 4664

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 710  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-14 2167  ax-ext 2175  ax-sep 4147  ax-pow 4203  ax-pr 4238

This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-nf 1472  df-sb 1774  df-clab 2180  df-cleq 2186  df-clel 2189  df-nfc 2325  df-v 2762  df-un 3157  df-in 3159  df-ss 3166  df-pw 3603  df-sn 3624  df-pr 3625  df-op 3627  df-br 4030  df-opab 4091  df-xp 4665  df-rel 4666

This theorem is referenced by: (None)