Theorem 3brtr3d 3793

Description: Substitution of equality into both sides of a binary relation. (Contributed by NM, 18-Oct-1999.)

Hypotheses

Ref	Expression
3brtr3d.1	⊢ (𝜑 → 𝐴𝑅𝐵)
3brtr3d.2	⊢ (𝜑 → 𝐴 = 𝐶)
3brtr3d.3	⊢ (𝜑 → 𝐵 = 𝐷)

Assertion

Ref	Expression
3brtr3d	⊢ (𝜑 → 𝐶𝑅𝐷)

Proof of Theorem 3brtr3d

Step	Hyp	Ref	Expression
1		3brtr3d.1	. 2 ⊢ (𝜑 → 𝐴𝑅𝐵)
2		3brtr3d.2	. . 3 ⊢ (𝜑 → 𝐴 = 𝐶)
3		3brtr3d.3	. . 3 ⊢ (𝜑 → 𝐵 = 𝐷)
4	2, 3	breq12d 3777	. 2 ⊢ (𝜑 → (𝐴𝑅𝐵 ↔ 𝐶𝑅𝐷))
5	1, 4	mpbid 135	1 ⊢ (𝜑 → 𝐶𝑅𝐷)

Syntax hints:   → wi 4   = wceq 1243   class class class wbr 3764

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-io 630  ax-5 1336  ax-7 1337  ax-gen 1338  ax-ie1 1382  ax-ie2 1383  ax-8 1395  ax-10 1396  ax-11 1397  ax-i12 1398  ax-bndl 1399  ax-4 1400  ax-17 1419  ax-i9 1423  ax-ial 1427  ax-i5r 1428  ax-ext 2022

This theorem depends on definitions:  df-bi 110  df-3an 887  df-tru 1246  df-nf 1350  df-sb 1646  df-clab 2027  df-cleq 2033  df-clel 2036  df-nfc 2167  df-v 2559  df-un 2922  df-sn 3381  df-pr 3382  df-op 3384  df-br 3765

This theorem is referenced by:  ofrval  5722  phplem2  6316  ltaddnq  6505  prarloclemarch2  6517  prmuloclemcalc  6663  axcaucvglemcau  6972  apreap  7578  ltmul1  7583  subap0d  7631  divap1d  7776  lemul2a  7825  monoord2  9236  expubnd  9311  bernneq2  9370  resqrexlemcalc2  9613  resqrexlemcalc3  9614  abs2dif2  9703