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Theorem brco 5812
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 5808 . 2 ((𝐴 ∈ V ∧ 𝐵 ∈ V) → (𝐴(𝐶𝐷)𝐵 ↔ ∃𝑥(𝐴𝐷𝑥𝑥𝐶𝐵)))
41, 2, 3mp2an 698 1 (𝐴(𝐶𝐷)𝐵 ↔ ∃𝑥(𝐴𝐷𝑥𝑥𝐶𝐵))
Colors of variables: wff setvar class
Syntax hints:  wb 207  wa 396  wex 1786  wcel 2119  Vcvv 3431   class class class wbr 5072  ccom 5622
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1917  ax-6 1974  ax-7 2015  ax-8 2121  ax-9 2129  ax-ext 2711  ax-sep 5218  ax-pr 5362
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 854  df-3an 1094  df-tru 1550  df-fal 1560  df-ex 1787  df-sb 2074  df-clab 2718  df-cleq 2731  df-clel 2814  df-rab 3392  df-v 3433  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-nul 4262  df-if 4455  df-sn 4556  df-pr 4558  df-op 4562  df-br 5073  df-opab 5135  df-co 5627
This theorem is referenced by:  opelco  5813  cnvco  5827  cotrg  6061  resco  6201  imaco  6202  rnco  6203  rncoOLD  6204  coass  6217  dfpo2  6247  dffv2  6922  foeqcnvco  7244  f1eqcocnv  7245  ttrclss  9632  rtrclreclem3  15013  imasleval  17496  ustuqtop4  24227  metustexhalf  24539  dftr6  35979  coep  35980  coepr  35981  brtxp  36106  pprodss4v  36110  brpprod  36111  sscoid  36139  elfuns  36141  brimg  36163  brapply  36164  brcup  36165  brcap  36166  brsuccf  36168  funpartlem  36170  brrestrict  36177  dfrecs2  36178  dfrdg4  36179  cnvssco  44050  brpermmodel  45447  xpco2  49347
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