Theorem brco 4951

Description: Binary relation on a composition. (Contributed by NM, 21-Sep-2004.) (Revised by Mario Carneiro, 24-Feb-2015.)

Hypotheses

Ref	Expression
opelco.1	|- A e. _V
opelco.2	|- B e. _V

Assertion

Ref	Expression
brco	|- ( A ( C o. D ) B <-> E. x ( A D x /\ x C B ) )

Distinct variable groups:   x, A   x, B   x, C   x, D

Proof of Theorem brco

Step	Hyp	Ref	Expression
1		opelco.1	. 2 |- A e. _V
2		opelco.2	. 2 |- B e. _V
3		brcog 4947	. 2 |- ( ( A e. _V /\ B e. _V ) -> ( A ( C o. D ) B <-> E. x ( A D x /\ x C B ) ) )
4	1, 2, 3	mp2an 430	1 |- ( A ( C o. D ) B <-> E. x ( A D x /\ x C B ) )

This proof depends on syntax axioms:   /\ wa 104   <-> wb 105   E.wex 1545   e. wcel 2209   _Vcvv 2821   class class class wbr 4130   o. ccom 4778

This proof depends on 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 4249  ax-pow 4311  ax-pr 4346

This proof 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-v 2823  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-br 4131  df-opab 4193  df-co 4783

This theorem is used by:  opelco  4952  cnvco  4965  resco  5292  imaco  5293  rnco  5294  coass  5306  f1eqcocnv  5997