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Theorem ineq2d 3432
Description: Equality deduction for intersection of two classes. (Contributed by NM, 10-Apr-1994.)
Hypothesis
Ref Expression
ineq1d.1 (𝜑𝐴 = 𝐵)
Assertion
Ref Expression
ineq2d (𝜑 → (𝐶𝐴) = (𝐶𝐵))

Proof of Theorem ineq2d
StepHypRef Expression
1 ineq1d.1 . 2 (𝜑𝐴 = 𝐵)
2 ineq2 3426 . 2 (𝐴 = 𝐵 → (𝐶𝐴) = (𝐶𝐵))
31, 2syl 14 1 (𝜑 → (𝐶𝐴) = (𝐶𝐵))
Colors of variables:    wff set class
This proof depends on syntax axioms:  wi 4   = wceq 1402  cin 3219
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220
This proof depends on definitions:  df-bi 117  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-v 2823  df-in 3226
This theorem is used by:  disjpr2  3773  rint0  4009  riin0  4084  disji2  4122  xpriindim  4918  riinint  5043  reseq2  5058  csbresg  5066  resindm  5105  isoselem  6026  zfz1isolem1  11292  fsumm1  12183  bitsinv1  12729  ballotfilemfval  13229  ennnfonelemhf1o  13304  nninfdclemcl  13339  nninfdclemp1  13341  nninfdc  13344  ressvalsets  13418  ressbasd  13421  ressinbasd  13428  ressressg  13429  restval  13599  mgpress  14230  subrngpropd  14524  subrgpropd  14561  crng2idl  14868  basis1  15148  baspartn  15151  eltg  15153  tgdom  15173  ntrval  15211  resttopon2  15279  restopnb  15282  qtopbasss  15622  p1evtxdeqfilem  16552
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