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Theorem brco 5834
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 5830 . 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 3447   class class class wbr 5107  ccom 5642
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 2701  ax-sep 5251  ax-nul 5261  ax-pr 5387
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 2708  df-cleq 2721  df-clel 2803  df-rab 3406  df-v 3449  df-dif 3917  df-un 3919  df-ss 3931  df-nul 4297  df-if 4489  df-sn 4590  df-pr 4592  df-op 4596  df-br 5108  df-opab 5170  df-co 5647
This theorem is referenced by:  opelco  5835  cnvco  5849  cotrg  6080  cotrgOLD  6081  resco  6223  imaco  6224  rnco  6225  coass  6238  dfpo2  6269  dffv2  6956  foeqcnvco  7275  f1eqcocnv  7276  ttrclss  9673  rtrclreclem3  15026  imasleval  17504  ustuqtop4  24132  metustexhalf  24444  dftr6  35738  coep  35739  coepr  35740  brtxp  35868  pprodss4v  35872  brpprod  35873  sscoid  35901  elfuns  35903  brimg  35925  brapply  35926  brcup  35927  brcap  35928  brsuccf  35929  funpartlem  35930  brrestrict  35937  dfrecs2  35938  dfrdg4  35939  cnvssco  43595  brpermmodel  44993  xpco2  48842
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