Theorem breq12 3992

Description: Equality theorem for a binary relation. (Contributed by NM, 8-Feb-1996.)

Assertion

Ref	Expression
breq12	⊢ ((𝐴 = 𝐵 ∧ 𝐶 = 𝐷) → (𝐴𝑅𝐶 ↔ 𝐵𝑅𝐷))

Proof of Theorem breq12

Step	Hyp	Ref	Expression
1		breq1 3990	. 2 ⊢ (𝐴 = 𝐵 → (𝐴𝑅𝐶 ↔ 𝐵𝑅𝐶))
2		breq2 3991	. 2 ⊢ (𝐶 = 𝐷 → (𝐵𝑅𝐶 ↔ 𝐵𝑅𝐷))
3	1, 2	sylan9bb 459	1 ⊢ ((𝐴 = 𝐵 ∧ 𝐶 = 𝐷) → (𝐴𝑅𝐶 ↔ 𝐵𝑅𝐷))

Syntax hints:   → wi 4   ∧ wa 103   ↔ wb 104   = wceq 1348   class class class wbr 3987

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-ext 2152

This theorem depends on definitions:  df-bi 116  df-3an 975  df-tru 1351  df-nf 1454  df-sb 1756  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-v 2732  df-un 3125  df-sn 3587  df-pr 3588  df-op 3590  df-br 3988

This theorem is referenced by:  breq12i  3996  breq12d  4000  breqan12d  4003  posng  4681  isopolem  5799  poxp  6209  rbropapd  6219  ecopover  6609  ecopoverg  6612  ltdcnq  7352  recexpr  7593  ltresr  7794  reapval  8488  ltxr  9725  xrltnr  9729  xrltnsym  9743  xrlttr  9745  xrltso  9746  xrlttri3  9747  xposdif  9832  exmidsbthrlem  14019