Theorem 3brtr3d 3814

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

Hypotheses

Ref	Expression
3brtr3d.1	|- ( ph -> A R B )
3brtr3d.2	|- ( ph -> A = C )
3brtr3d.3	|- ( ph -> B = D )

Assertion

Ref	Expression
3brtr3d	|- ( ph -> C R D )

Proof of Theorem 3brtr3d

Step	Hyp	Ref	Expression
1		3brtr3d.1	. 2 |- ( ph -> A R B )
2		3brtr3d.2	. . 3 |- ( ph -> A = C )
3		3brtr3d.3	. . 3 |- ( ph -> B = D )
4	2, 3	breq12d 3798	. 2 |- ( ph -> ( A R B <-> C R D ) )
5	1, 4	mpbid 145	1 |- ( ph -> C R D )

Syntax hints:   -> wi 4   = wceq 1284   class class class wbr 3785

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-io 662  ax-5 1376  ax-7 1377  ax-gen 1378  ax-ie1 1422  ax-ie2 1423  ax-8 1435  ax-10 1436  ax-11 1437  ax-i12 1438  ax-bndl 1439  ax-4 1440  ax-17 1459  ax-i9 1463  ax-ial 1467  ax-i5r 1468  ax-ext 2063

This theorem depends on definitions:  df-bi 115  df-3an 921  df-tru 1287  df-nf 1390  df-sb 1686  df-clab 2068  df-cleq 2074  df-clel 2077  df-nfc 2208  df-v 2603  df-un 2977  df-sn 3404  df-pr 3405  df-op 3407  df-br 3786

This theorem is referenced by:  ofrval  5742  phplem2  6339  ltaddnq  6597  prarloclemarch2  6609  prmuloclemcalc  6755  axcaucvglemcau  7064  apreap  7687  ltmul1  7692  subap0d  7740  divap1d  7888  lemul2a  7937  monoord2  9456  expubnd  9533  bernneq2  9594  resqrexlemcalc2  9901  resqrexlemcalc3  9902  abs2dif2  9993