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Theorem brco 5855
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 5851 . 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 1779  wcel 2109  Vcvv 3464   class class class wbr 5124  ccom 5663
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-ext 2708  ax-sep 5271  ax-nul 5281  ax-pr 5407
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-sb 2066  df-clab 2715  df-cleq 2728  df-clel 2810  df-rab 3421  df-v 3466  df-dif 3934  df-un 3936  df-ss 3948  df-nul 4314  df-if 4506  df-sn 4607  df-pr 4609  df-op 4613  df-br 5125  df-opab 5187  df-co 5668
This theorem is referenced by:  opelco  5856  cnvco  5870  cotrg  6101  cotrgOLD  6102  resco  6244  imaco  6245  rnco  6246  coass  6259  dfpo2  6290  dffv2  6979  foeqcnvco  7298  f1eqcocnv  7299  ttrclss  9739  rtrclreclem3  15084  imasleval  17560  ustuqtop4  24188  metustexhalf  24500  dftr6  35773  coep  35774  coepr  35775  brtxp  35903  pprodss4v  35907  brpprod  35908  sscoid  35936  elfuns  35938  brimg  35960  brapply  35961  brcup  35962  brcap  35963  brsuccf  35964  funpartlem  35965  brrestrict  35972  dfrecs2  35973  dfrdg4  35974  cnvssco  43597  brpermmodel  44995
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