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Theorem eqsstrrid 3204
Description: B chained subclass and equality deduction. (Contributed by NM, 25-Apr-2004.)
Hypotheses
Ref Expression
eqsstrrid.1 𝐵 = 𝐴
eqsstrrid.2 (𝜑𝐵𝐶)
Assertion
Ref Expression
eqsstrrid (𝜑𝐴𝐶)

Proof of Theorem eqsstrrid
StepHypRef Expression
1 eqsstrrid.1 . . 3 𝐵 = 𝐴
21eqcomi 2181 . 2 𝐴 = 𝐵
3 eqsstrrid.2 . 2 (𝜑𝐵𝐶)
42, 3eqsstrid 3203 1 (𝜑𝐴𝐶)
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1353  wss 3131
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 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-11 1506  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-ext 2159
This theorem depends on definitions:  df-bi 117  df-nf 1461  df-sb 1763  df-clab 2164  df-cleq 2170  df-clel 2173  df-in 3137  df-ss 3144
This theorem is referenced by:  abnexg  4448  relcnvtr  5150  resasplitss  5397  fimacnvdisj  5402  fimacnv  5648  f1ompt  5670  tfr1onlemres  6353  tfrcllemres  6366
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