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Theorem breqtrdi 4171
Description: A chained equality inference for a binary relation. (Contributed by NM, 11-Oct-1999.)
Hypotheses
Ref Expression
breqtrdi.1 (𝜑𝐴𝑅𝐵)
breqtrdi.2 𝐵 = 𝐶
Assertion
Ref Expression
breqtrdi (𝜑𝐴𝑅𝐶)

Proof of Theorem breqtrdi
StepHypRef Expression
1 breqtrdi.1 . 2 (𝜑𝐴𝑅𝐵)
2 eqid 2238 . 2 𝐴 = 𝐴
3 breqtrdi.2 . 2 𝐵 = 𝐶
41, 2, 33brtr3g 4163 1 (𝜑𝐴𝑅𝐶)
Colors of variables:    wff set class
This proof depends on syntax axioms:  wi 4   = 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:  breqtrrdi  4172  en2eleq  7547  en2other2  7548  dju0en  7570  ltm1sr  8144  maxle2  11978  xrmax2sup  12020  mertenslem2  12303  ege2le3  12438  cos01gt0  12530  sin02gt0  12531  cos12dec  12535  bitsfzolem  12721  bitsmod  12723  unennn  13288  dvef  15828  sin0pilem2  15883  cosq23lt0  15934  cosq34lt1  15951  cos02pilt1  15952  logbgcd1irraplemexp  16070  pellexlem2  16092  lgslem3  16121  lgsquadlem1  16196  lgsquadlem3  16198  trilpolemeq1  17089
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