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Theorem brco 5842
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 5838 . 2 ((𝐴 ∈ V ∧ 𝐵 ∈ V) → (𝐴(𝐶𝐷)𝐵 ↔ ∃𝑥(𝐴𝐷𝑥𝑥𝐶𝐵)))
41, 2, 3mp2an 702 1 (𝐴(𝐶𝐷)𝐵 ↔ ∃𝑥(𝐴𝐷𝑥𝑥𝐶𝐵))
Colors of variables: wff setvar class
Syntax hints:  wb 208  wa 399  wex 1799  wcel 2142  Vcvv 3454   class class class wbr 5100  ccom 5651
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1815  ax-4 1829  ax-5 1930  ax-6 1987  ax-7 2028  ax-8 2144  ax-9 2152  ax-ext 2734  ax-sep 5246  ax-pr 5390
This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1100  df-tru 1563  df-fal 1573  df-ex 1800  df-sb 2091  df-clab 2741  df-cleq 2754  df-clel 2837  df-rab 3415  df-v 3456  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4481  df-sn 4583  df-pr 4585  df-op 4589  df-br 5101  df-opab 5163  df-co 5656
This theorem is referenced by:  opelco  5843  cnvco  5861  cotrg  6098  resco  6237  imaco  6238  rnco  6239  rncoOLD  6240  coass  6253  dfpo2  6283  dffv2  6962  foeqcnvco  7284  f1eqcocnv  7285  ttrclss  9675  rtrclreclem3  15073  imasleval  17571  ustuqtop4  24304  metustexhalf  24616  dftr6  36101  coep  36102  coepr  36103  brtxp  36228  pprodss4v  36232  brpprod  36233  sscoid  36261  elfuns  36263  brimg  36285  brapply  36286  brcup  36287  brcap  36288  brsuccf  36290  funpartlem  36292  brrestrict  36299  dfrecs2  36300  dfrdg4  36301  cnvssco  44182  brpermmodel  45579  xpco2  49478
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