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Theorem csbfv2g 3743
Description: Move class substitution in and out of a function value.
Assertion
Ref Expression
csbfv2g |- (A e. C -> [_A / x]_(F` B) = (F` [_A / x]_B))
Distinct variable group:   x,F

Proof of Theorem csbfv2g
StepHypRef Expression
1 csbfv12g 3742 . 2 |- (A e. C -> [_A / x]_(F` B) = ([_A / x]_F` [_A / x]_B))
2 ax-17 971 . . . 4 |- (y e. F -> A.x y e. F)
32csbconstgf 2010 . . 3 |- (A e. C -> [_A / x]_F = F)
43fveq1d 3726 . 2 |- (A e. C -> ([_A / x]_F` [_A / x]_B) = (F` [_A / x]_B))
51, 4eqtrd 1507 1 |- (A e. C -> [_A / x]_(F` B) = (F` [_A / x]_B))
Colors of variables: wff set class
Syntax hints:   -> wi 3   = wceq 956   e. wcel 958  [_csb 2001  ` cfv 3182
This theorem is referenced by:  csbfvg 3744  fsumabs 7043  efaddlem5 7342  oprcn 7977  ipval2lem1 8351
This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 962  ax-gen 963  ax-8 964  ax-9 965  ax-10 966  ax-11 967  ax-12 968  ax-13 969  ax-14 970  ax-17 971  ax-4 973  ax-5o 975  ax-6o 978  ax-9o 1123  ax-10o 1140  ax-16 1210  ax-11o 1218  ax-ext 1459  ax-sep 2703  ax-pow 2742  ax-pr 2779
This theorem depends on definitions:  df-bi 147  df-or 224  df-an 225  df-3an 777  df-ex 981  df-sb 1172  df-eu 1382  df-mo 1383  df-clab 1464  df-cleq 1469  df-clel 1472  df-ne 1587  df-rex 1650  df-v 1812  df-sbc 1942  df-csb 2002  df-dif 2049  df-un 2050  df-in 2051  df-ss 2053  df-nul 2281  df-pw 2402  df-sn 2412  df-pr 2413  df-op 2416  df-uni 2504  df-br 2620  df-opab 2667  df-xp 3184  df-cnv 3186  df-dm 3188  df-rn 3189  df-res 3190  df-ima 3191  df-fv 3198
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