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Theorem breqan12d 4146
Description: Equality deduction for a binary relation. (Contributed by NM, 8-Feb-1996.)
Hypotheses
Ref Expression
breq1d.1 (𝜑𝐴 = 𝐵)
breqan12i.2 (𝜓𝐶 = 𝐷)
Assertion
Ref Expression
breqan12d ((𝜑𝜓) → (𝐴𝑅𝐶𝐵𝑅𝐷))

Proof of Theorem breqan12d
StepHypRef Expression
1 breq1d.1 . 2 (𝜑𝐴 = 𝐵)
2 breqan12i.2 . 2 (𝜓𝐶 = 𝐷)
3 breq12 4135 . 2 ((𝐴 = 𝐵𝐶 = 𝐷) → (𝐴𝑅𝐶𝐵𝑅𝐷))
41, 2, 3syl2an 289 1 ((𝜑𝜓) → (𝐴𝑅𝐶𝐵𝑅𝐷))
Colors of variables:    wff set class
This proof depends on syntax axioms:  wi 4  wa 104  wb 105   = wceq 1402   class class class wbr 4130
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-v 2823  df-un 3224  df-sn 3715  df-pr 3716  df-op 3718  df-br 4131
This theorem is used by:  breqan12rd  4147  sosng  4848  isoresbr  6015  isoid  6016  isores3  6021  isoini2  6025  ofrfval  6311  oviec  6915  enqbreq2  7724  ltresr2  8207  axpre-ltadd  8253  leltadd  8775  xltneg  10238  lt2sq  11050  le2sq  11051  cnreim  11744  sqrtle  11802  sqrtlt  11803  absext  11829  reefiso  15878  logltb  15975  birthdaylem3  16089  lgsquadlem3  16198
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