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Theorem eqsstrrd 3275
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 2238 . 2 (𝜑𝐴 = 𝐵)
3 eqsstrrd.2 . 2 (𝜑𝐵𝐶)
42, 3eqsstrd 3274 1 (𝜑𝐴𝐶)
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1398  wss 3211
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 2214
This theorem depends on definitions:  df-bi 117  df-nf 1510  df-sb 1812  df-clab 2219  df-cleq 2225  df-clel 2228  df-in 3217  df-ss 3224
This theorem is referenced by:  ssxpbm  5198  ssxp1  5199  ssxp2  5200  suppssof1  6284  tfrlemiubacc  6561  tfr1onlemubacc  6577  tfrcllemubacc  6590  oaword1  6704  phplem4dom  7116  fisseneq  7195  nnnninfeq2  7420  archnqq  7732  hashdmprop2dom  11216  imasaddfnlemg  13527  resmhm2  13701  ringidss  14173  subrg1  14376  subrgdvds  14380  subrguss  14381  subrginv  14382  islss3  14527  lspsnneg  14568  epttop  14955  metequiv2  15361  limccnpcntop  15540  limccnp2lem  15541  limccnp2cntop  15542  umgredgprv  16110  uspgrupgrushgr  16177  usgrumgruspgr  16180  nnsf  16783
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