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Theorem brco 5819
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 5815 . 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 1780  wcel 2113  Vcvv 3440   class class class wbr 5098  ccom 5628
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-ext 2708  ax-sep 5241  ax-nul 5251  ax-pr 5377
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-sb 2068  df-clab 2715  df-cleq 2728  df-clel 2811  df-rab 3400  df-v 3442  df-dif 3904  df-un 3906  df-ss 3918  df-nul 4286  df-if 4480  df-sn 4581  df-pr 4583  df-op 4587  df-br 5099  df-opab 5161  df-co 5633
This theorem is referenced by:  opelco  5820  cnvco  5834  cotrg  6068  resco  6208  imaco  6209  rnco  6210  rncoOLD  6211  coass  6224  dfpo2  6254  dffv2  6929  foeqcnvco  7246  f1eqcocnv  7247  ttrclss  9629  rtrclreclem3  14983  imasleval  17462  ustuqtop4  24188  metustexhalf  24500  dftr6  35945  coep  35946  coepr  35947  brtxp  36072  pprodss4v  36076  brpprod  36077  sscoid  36105  elfuns  36107  brimg  36129  brapply  36130  brcup  36131  brcap  36132  brsuccf  36134  funpartlem  36136  brrestrict  36143  dfrecs2  36144  dfrdg4  36145  cnvssco  43857  brpermmodel  45254  xpco2  49112
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