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Theorem brco 5779
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 5775 . 2 ((𝐴 ∈ V ∧ 𝐵 ∈ V) → (𝐴(𝐶𝐷)𝐵 ↔ ∃𝑥(𝐴𝐷𝑥𝑥𝐶𝐵)))
41, 2, 3mp2an 689 1 (𝐴(𝐶𝐷)𝐵 ↔ ∃𝑥(𝐴𝐷𝑥𝑥𝐶𝐵))
Colors of variables: wff setvar class
Syntax hints:  wb 205  wa 396  wex 1782  wcel 2106  Vcvv 3432   class class class wbr 5074  ccom 5593
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-ext 2709  ax-sep 5223  ax-nul 5230  ax-pr 5352
This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1783  df-sb 2068  df-clab 2716  df-cleq 2730  df-clel 2816  df-rab 3073  df-v 3434  df-dif 3890  df-un 3892  df-nul 4257  df-if 4460  df-sn 4562  df-pr 4564  df-op 4568  df-br 5075  df-opab 5137  df-co 5598
This theorem is referenced by:  opelco  5780  cnvco  5794  resco  6154  imaco  6155  rnco  6156  coass  6169  dfpo2  6199  dffv2  6863  foeqcnvco  7172  f1eqcocnv  7173  f1eqcocnvOLD  7174  ttrclss  9478  rtrclreclem3  14771  imasleval  17252  ustuqtop4  23396  metustexhalf  23712  dftr6  33718  coep  33719  coepr  33720  brtxp  34182  pprodss4v  34186  brpprod  34187  sscoid  34215  elfuns  34217  brimg  34239  brapply  34240  brcup  34241  brcap  34242  brsuccf  34243  funpartlem  34244  brrestrict  34251  dfrecs2  34252  dfrdg4  34253  cnvssco  41214
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