ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  breq12 GIF version

Theorem breq12 4091
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 4089 . 2 (𝐴 = 𝐵 → (𝐴𝑅𝐶𝐵𝑅𝐶))
2 breq2 4090 . 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 1395   class class class wbr 4086
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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-ext 2211
This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-nf 1507  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-v 2802  df-un 3202  df-sn 3673  df-pr 3674  df-op 3676  df-br 4087
This theorem is referenced by:  breq12i  4095  breq12d  4099  breqan12d  4102  posng  4796  isopolem  5958  poxp  6392  rbropapd  6403  ecopover  6797  ecopoverg  6800  ltdcnq  7607  recexpr  7848  ltresr  8049  reapval  8746  ltxr  10000  xrltnr  10004  xrltnsym  10018  xrlttr  10020  xrltso  10021  xrlttri3  10022  xposdif  10107  f1olecpbl  13386  wlk2f  16148  exmidsbthrlem  16562
  Copyright terms: Public domain W3C validator