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Theorem brco 5768
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 5764 . 2 ((𝐴 ∈ V ∧ 𝐵 ∈ V) → (𝐴(𝐶𝐷)𝐵 ↔ ∃𝑥(𝐴𝐷𝑥𝑥𝐶𝐵)))
41, 2, 3mp2an 688 1 (𝐴(𝐶𝐷)𝐵 ↔ ∃𝑥(𝐴𝐷𝑥𝑥𝐶𝐵))
Colors of variables: wff setvar class
Syntax hints:  wb 205  wa 395  wex 1783  wcel 2108  Vcvv 3422   class class class wbr 5070  ccom 5584
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1799  ax-4 1813  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2110  ax-9 2118  ax-ext 2709  ax-sep 5218  ax-nul 5225  ax-pr 5347
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1784  df-sb 2069  df-clab 2716  df-cleq 2730  df-clel 2817  df-rab 3072  df-v 3424  df-dif 3886  df-un 3888  df-nul 4254  df-if 4457  df-sn 4559  df-pr 4561  df-op 4565  df-br 5071  df-opab 5133  df-co 5589
This theorem is referenced by:  opelco  5769  cnvco  5783  resco  6143  imaco  6144  rnco  6145  coass  6158  dfpo2  6188  dffv2  6845  foeqcnvco  7152  f1eqcocnv  7153  f1eqcocnvOLD  7154  rtrclreclem3  14699  imasleval  17169  ustuqtop4  23304  metustexhalf  23618  dftr6  33624  coep  33625  coepr  33626  ttrclss  33706  brtxp  34109  pprodss4v  34113  brpprod  34114  sscoid  34142  elfuns  34144  brimg  34166  brapply  34167  brcup  34168  brcap  34169  brsuccf  34170  funpartlem  34171  brrestrict  34178  dfrecs2  34179  dfrdg4  34180  cnvssco  41103
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