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Theorem ineq2d 3201
Description: Equality deduction for intersection of two classes. (Contributed by NM, 10-Apr-1994.)
Hypothesis
Ref Expression
ineq1d.1  |-  ( ph  ->  A  =  B )
Assertion
Ref Expression
ineq2d  |-  ( ph  ->  ( C  i^i  A
)  =  ( C  i^i  B ) )

Proof of Theorem ineq2d
StepHypRef Expression
1 ineq1d.1 . 2  |-  ( ph  ->  A  =  B )
2 ineq2 3195 . 2  |-  ( A  =  B  ->  ( C  i^i  A )  =  ( C  i^i  B
) )
31, 2syl 14 1  |-  ( ph  ->  ( C  i^i  A
)  =  ( C  i^i  B ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1289    i^i cin 2998
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-io 665  ax-5 1381  ax-7 1382  ax-gen 1383  ax-ie1 1427  ax-ie2 1428  ax-8 1440  ax-10 1441  ax-11 1442  ax-i12 1443  ax-bndl 1444  ax-4 1445  ax-17 1464  ax-i9 1468  ax-ial 1472  ax-i5r 1473  ax-ext 2070
This theorem depends on definitions:  df-bi 115  df-tru 1292  df-nf 1395  df-sb 1693  df-clab 2075  df-cleq 2081  df-clel 2084  df-nfc 2217  df-v 2621  df-in 3005
This theorem is referenced by:  disjpr2  3506  rint0  3727  riin0  3801  disji2  3838  xpriindim  4574  riinint  4694  reseq2  4708  csbresg  4716  resindm  4754  isoselem  5599  zfz1isolem1  10245  fsumm1  10810
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