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Theorem brco 5827
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 5823 . 2 ((𝐴 ∈ V ∧ 𝐵 ∈ V) → (𝐴(𝐶𝐷)𝐵 ↔ ∃𝑥(𝐴𝐷𝑥𝑥𝐶𝐵)))
41, 2, 3mp2an 693 1 (𝐴(𝐶𝐷)𝐵 ↔ ∃𝑥(𝐴𝐷𝑥𝑥𝐶𝐵))
Colors of variables: wff setvar class
Syntax hints:  wb 206  wa 395  wex 1781  wcel 2114  Vcvv 3442   class class class wbr 5100  ccom 5636
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-ext 2709  ax-sep 5243  ax-pr 5379
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-sb 2069  df-clab 2716  df-cleq 2729  df-clel 2812  df-rab 3402  df-v 3444  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-nul 4288  df-if 4482  df-sn 4583  df-pr 4585  df-op 4589  df-br 5101  df-opab 5163  df-co 5641
This theorem is referenced by:  opelco  5828  cnvco  5842  cotrg  6076  resco  6216  imaco  6217  rnco  6218  rncoOLD  6219  coass  6232  dfpo2  6262  dffv2  6937  foeqcnvco  7256  f1eqcocnv  7257  ttrclss  9641  rtrclreclem3  14995  imasleval  17474  ustuqtop4  24200  metustexhalf  24512  dftr6  35967  coep  35968  coepr  35969  brtxp  36094  pprodss4v  36098  brpprod  36099  sscoid  36127  elfuns  36129  brimg  36151  brapply  36152  brcup  36153  brcap  36154  brsuccf  36156  funpartlem  36158  brrestrict  36165  dfrecs2  36166  dfrdg4  36167  cnvssco  43962  brpermmodel  45359  xpco2  49216
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