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Theorem ineq2d 3426
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 3420 . 2 (𝐴 = 𝐵 → (𝐶𝐴) = (𝐶𝐵))
31, 2syl 14 1 (𝜑 → (𝐶𝐴) = (𝐶𝐵))
Colors of variables: wff set class
Syntax hints:  wi 4   = wceq 1398  cin 3213
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-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2216
This theorem depends on definitions:  df-bi 117  df-tru 1401  df-nf 1510  df-sb 1812  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-v 2817  df-in 3220
This theorem is referenced by:  disjpr2  3758  rint0  3993  riin0  4068  disji2  4106  xpriindim  4898  riinint  5023  reseq2  5038  csbresg  5046  resindm  5085  isoselem  5999  zfz1isolem1  11240  fsumm1  12130  bitsinv1  12676  ballotfilemfval  13176  ennnfonelemhf1o  13251  nninfdclemcl  13286  nninfdclemp1  13288  nninfdc  13291  ressvalsets  13364  ressbasd  13367  ressinbasd  13374  ressressg  13375  restval  13545  mgpress  14173  subrngpropd  14465  subrgpropd  14502  crng2idl  14808  basis1  15041  baspartn  15044  eltg  15046  tgdom  15066  ntrval  15104  resttopon2  15172  restopnb  15175  qtopbasss  15515  p1evtxdeqfilem  16435
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