Theorem eqbrtrdi 4127

Description: A chained equality inference for a binary relation. (Contributed by NM, 12-Oct-1999.)

Hypotheses

Ref	Expression
eqbrtrdi.1	⊢ (𝜑 → 𝐴 = 𝐵)
eqbrtrdi.2	⊢ 𝐵𝑅𝐶

Assertion

Ref	Expression
eqbrtrdi	⊢ (𝜑 → 𝐴𝑅𝐶)

Proof of Theorem eqbrtrdi

Step	Hyp	Ref	Expression
1		eqbrtrdi.2	. 2 ⊢ 𝐵𝑅𝐶
2		eqbrtrdi.1	. . 3 ⊢ (𝜑 → 𝐴 = 𝐵)
3	2	breq1d 4098	. 2 ⊢ (𝜑 → (𝐴𝑅𝐶 ↔ 𝐵𝑅𝐶))
4	1, 3	mpbiri 168	1 ⊢ (𝜑 → 𝐴𝑅𝐶)

Syntax hints:   → wi 4   = wceq 1397   class class class wbr 4088

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 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-ext 2213

This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-v 2804  df-un 3204  df-sn 3675  df-pr 3676  df-op 3678  df-br 4089

This theorem is referenced by:  eqbrtrrdi  4128  pm54.43  7394  recapb  8850  nn0ledivnn  10001  xltnegi  10069  leexp1a  10855  facwordi  11001  faclbnd3  11004  resqrexlemlo  11573  efap0  12237  dvds1  12413  en1top  14800  dvef  15450  rpabscxpbnd  15663  zabsle1  15727  lgseisen  15802  lgsquadlem2  15806  upgr2wlkdc  16227  trirec0  16648