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Theorem eqsstrrd 3264
Description: Substitution of equality into a subclass relationship. (Contributed by NM, 25-Apr-2004.)
Hypotheses
Ref Expression
eqsstrrd.1 (𝜑𝐵 = 𝐴)
eqsstrrd.2 (𝜑𝐵𝐶)
Assertion
Ref Expression
eqsstrrd (𝜑𝐴𝐶)

Proof of Theorem eqsstrrd
StepHypRef Expression
1 eqsstrrd.1 . . 3 (𝜑𝐵 = 𝐴)
21eqcomd 2237 . 2 (𝜑𝐴 = 𝐵)
3 eqsstrrd.2 . 2 (𝜑𝐵𝐶)
42, 3eqsstrd 3263 1 (𝜑𝐴𝐶)
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1397  wss 3200
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-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-11 1554  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-nf 1509  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-in 3206  df-ss 3213
This theorem is referenced by:  ssxpbm  5172  ssxp1  5173  ssxp2  5174  suppssof1  6253  tfrlemiubacc  6496  tfr1onlemubacc  6512  tfrcllemubacc  6525  oaword1  6639  phplem4dom  7048  fisseneq  7127  nnnninfeq2  7328  archnqq  7637  hashdmprop2dom  11109  imasaddfnlemg  13402  resmhm2  13576  ringidss  14048  subrg1  14251  subrgdvds  14255  subrguss  14256  subrginv  14257  islss3  14399  lspsnneg  14440  epttop  14820  metequiv2  15226  limccnpcntop  15405  limccnp2lem  15406  limccnp2cntop  15407  umgredgprv  15972  uspgrupgrushgr  16039  usgrumgruspgr  16042  nnsf  16633
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