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Theorem imaeq1d 4850
Description: Equality theorem for image. (Contributed by FL, 15-Dec-2006.)
Hypothesis
Ref Expression
imaeq1d.1  |-  ( ph  ->  A  =  B )
Assertion
Ref Expression
imaeq1d  |-  ( ph  ->  ( A " C
)  =  ( B
" C ) )

Proof of Theorem imaeq1d
StepHypRef Expression
1 imaeq1d.1 . 2  |-  ( ph  ->  A  =  B )
2 imaeq1 4846 . 2  |-  ( A  =  B  ->  ( A " C )  =  ( B " C
) )
31, 2syl 14 1  |-  ( ph  ->  ( A " C
)  =  ( B
" C ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1316   "cima 4512
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 683  ax-5 1408  ax-7 1409  ax-gen 1410  ax-ie1 1454  ax-ie2 1455  ax-8 1467  ax-10 1468  ax-11 1469  ax-i12 1470  ax-bndl 1471  ax-4 1472  ax-17 1491  ax-i9 1495  ax-ial 1499  ax-i5r 1500  ax-ext 2099
This theorem depends on definitions:  df-bi 116  df-3an 949  df-tru 1319  df-nf 1422  df-sb 1721  df-clab 2104  df-cleq 2110  df-clel 2113  df-nfc 2247  df-v 2662  df-un 3045  df-in 3047  df-ss 3054  df-sn 3503  df-pr 3504  df-op 3506  df-br 3900  df-opab 3960  df-cnv 4517  df-dm 4519  df-rn 4520  df-res 4521  df-ima 4522
This theorem is referenced by:  imaeq12d  4852  nfimad  4860  f1imacnv  5352  foimacnv  5353  suppssof1  5967  ssenen  6713  iscn  12293
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