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Theorem brco 5895
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 5891 . 2 ((𝐴 ∈ V ∧ 𝐵 ∈ V) → (𝐴(𝐶𝐷)𝐵 ↔ ∃𝑥(𝐴𝐷𝑥𝑥𝐶𝐵)))
41, 2, 3mp2an 691 1 (𝐴(𝐶𝐷)𝐵 ↔ ∃𝑥(𝐴𝐷𝑥𝑥𝐶𝐵))
Colors of variables: wff setvar class
Syntax hints:  wb 206  wa 395  wex 1777  wcel 2108  Vcvv 3488   class class class wbr 5166  ccom 5704
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1793  ax-4 1807  ax-5 1909  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-ext 2711  ax-sep 5317  ax-nul 5324  ax-pr 5447
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 847  df-3an 1089  df-tru 1540  df-fal 1550  df-ex 1778  df-sb 2065  df-clab 2718  df-cleq 2732  df-clel 2819  df-rab 3444  df-v 3490  df-dif 3979  df-un 3981  df-ss 3993  df-nul 4353  df-if 4549  df-sn 4649  df-pr 4651  df-op 4655  df-br 5167  df-opab 5229  df-co 5709
This theorem is referenced by:  opelco  5896  cnvco  5910  cotrg  6139  cotrgOLD  6140  resco  6281  imaco  6282  rnco  6283  coass  6296  dfpo2  6327  dffv2  7017  foeqcnvco  7336  f1eqcocnv  7337  ttrclss  9789  rtrclreclem3  15109  imasleval  17601  ustuqtop4  24274  metustexhalf  24590  dftr6  35713  coep  35714  coepr  35715  brtxp  35844  pprodss4v  35848  brpprod  35849  sscoid  35877  elfuns  35879  brimg  35901  brapply  35902  brcup  35903  brcap  35904  brsuccf  35905  funpartlem  35906  brrestrict  35913  dfrecs2  35914  dfrdg4  35915  cnvssco  43568
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