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Theorem brco 5880
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 ∈ V
opelco.2 𝐵 ∈ V
Assertion
Ref Expression
brco (𝐴(𝐶𝐷)𝐵 ↔ ∃𝑥(𝐴𝐷𝑥𝑥𝐶𝐵))
Distinct variable groups:   𝑥,𝐴   𝑥,𝐵   𝑥,𝐶   𝑥,𝐷

Proof of Theorem brco
StepHypRef Expression
1 opelco.1 . 2 𝐴 ∈ V
2 opelco.2 . 2 𝐵 ∈ V
3 brcog 5876 . 2 ((𝐴 ∈ V ∧ 𝐵 ∈ V) → (𝐴(𝐶𝐷)𝐵 ↔ ∃𝑥(𝐴𝐷𝑥𝑥𝐶𝐵)))
41, 2, 3mp2an 692 1 (𝐴(𝐶𝐷)𝐵 ↔ ∃𝑥(𝐴𝐷𝑥𝑥𝐶𝐵))
Colors of variables: wff setvar class
Syntax hints:  wb 206  wa 395  wex 1778  wcel 2107  Vcvv 3479   class class class wbr 5142  ccom 5688
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1794  ax-4 1808  ax-5 1909  ax-6 1966  ax-7 2006  ax-8 2109  ax-9 2117  ax-ext 2707  ax-sep 5295  ax-nul 5305  ax-pr 5431
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1779  df-sb 2064  df-clab 2714  df-cleq 2728  df-clel 2815  df-rab 3436  df-v 3481  df-dif 3953  df-un 3955  df-ss 3967  df-nul 4333  df-if 4525  df-sn 4626  df-pr 4628  df-op 4632  df-br 5143  df-opab 5205  df-co 5693
This theorem is referenced by:  opelco  5881  cnvco  5895  cotrg  6126  cotrgOLD  6127  resco  6269  imaco  6270  rnco  6271  coass  6284  dfpo2  6315  dffv2  7003  foeqcnvco  7321  f1eqcocnv  7322  ttrclss  9761  rtrclreclem3  15100  imasleval  17587  ustuqtop4  24254  metustexhalf  24570  dftr6  35752  coep  35753  coepr  35754  brtxp  35882  pprodss4v  35886  brpprod  35887  sscoid  35915  elfuns  35917  brimg  35939  brapply  35940  brcup  35941  brcap  35942  brsuccf  35943  funpartlem  35944  brrestrict  35951  dfrecs2  35952  dfrdg4  35953  cnvssco  43624
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