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Theorem eqsstrrd 3265
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 3264 1 (𝜑𝐴𝐶)
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1398  wss 3201
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 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-11 1555  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2213
This theorem depends on definitions:  df-bi 117  df-nf 1510  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-in 3207  df-ss 3214
This theorem is referenced by:  ssxpbm  5179  ssxp1  5180  ssxp2  5181  suppssof1  6262  tfrlemiubacc  6539  tfr1onlemubacc  6555  tfrcllemubacc  6568  oaword1  6682  phplem4dom  7091  fisseneq  7170  nnnninfeq2  7371  archnqq  7680  hashdmprop2dom  11154  imasaddfnlemg  13460  resmhm2  13634  ringidss  14106  subrg1  14309  subrgdvds  14313  subrguss  14314  subrginv  14315  islss3  14458  lspsnneg  14499  epttop  14884  metequiv2  15290  limccnpcntop  15469  limccnp2lem  15470  limccnp2cntop  15471  umgredgprv  16039  uspgrupgrushgr  16106  usgrumgruspgr  16109  nnsf  16714
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