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Theorem breq12 4116
Description: Equality theorem for a binary relation. (Contributed by NM, 8-Feb-1996.)
Assertion
Ref Expression
breq12 ((𝐴 = 𝐵𝐶 = 𝐷) → (𝐴𝑅𝐶𝐵𝑅𝐷))

Proof of Theorem breq12
StepHypRef Expression
1 breq1 4114 . 2 (𝐴 = 𝐵 → (𝐴𝑅𝐶𝐵𝑅𝐶))
2 breq2 4115 . 2 (𝐶 = 𝐷 → (𝐵𝑅𝐶𝐵𝑅𝐷))
31, 2sylan9bb 462 1 ((𝐴 = 𝐵𝐶 = 𝐷) → (𝐴𝑅𝐶𝐵𝑅𝐷))
Colors of variables: wff set class
Syntax hints:  wi 4  wa 104  wb 105   = wceq 1398   class class class wbr 4111
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2216
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1812  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-v 2817  df-un 3217  df-sn 3697  df-pr 3698  df-op 3700  df-br 4112
This theorem is referenced by:  breq12i  4120  breq12d  4124  breqan12d  4127  posng  4824  isopolem  5997  poxp  6430  rbropapd  6475  ecopover  6869  ecopoverg  6872  ltdcnq  7714  recexpr  7955  ltresr  8156  reapval  8852  ltxr  10111  xrltnr  10115  xrltnsym  10129  xrlttr  10131  xrltso  10132  xrlttri3  10133  xposdif  10218  f1olecpbl  13543  wlk2f  16363  exmidsbthrlem  16819
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