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Theorem fvresex 3857
Description: Existence of the class of values of a restricted class.
Hypothesis
Ref Expression
fvresex.1 |- A e. V
Assertion
Ref Expression
fvresex |- {y | E.x y = ((F |` A)` x)} e. V
Distinct variable groups:   x,y,F   x,A,y

Proof of Theorem fvresex
StepHypRef Expression
1 visset 1813 . . . . . . 7 |- x e. V
2 fvex 3732 . . . . . . 7 |- (F` x) e. V
3 fveq2 3724 . . . . . . 7 |- (z = x -> (F` z) = (F` x))
41, 2, 3fvopab 3790 . . . . . 6 |- ({<.z, w>. | w = (F` z)}` x) = (F` x)
5 fveqres 3749 . . . . . 6 |- (({<.z, w>. | w = (F` z)}` x) = (F` x) -> (({<.z, w>. | w = (F` z)} |` A)` x) = ((F |` A)` x))
64, 5ax-mp 7 . . . . 5 |- (({<.z, w>. | w = (F` z)} |` A)` x) = ((F |` A)` x)
76eqeq2i 1485 . . . 4 |- (y = (({<.z, w>. | w = (F` z)} |` A)` x) <-> y = ((F |` A)` x))
87exbii 1051 . . 3 |- (E.x y = (({<.z, w>. | w = (F` z)} |` A)` x) <-> E.x y = ((F |` A)` x))
98abbii 1575 . 2 |- {y | E.x y = (({<.z, w>. | w = (F` z)} |` A)` x)} = {y | E.x y = ((F |` A)` x)}
10 funopabeq 3549 . . . 4 |- Fun {<.z, w>. | w = (F` z)}
11 fvresex.1 . . . 4 |- A e. V
12 resfunexg 3579 . . . 4 |- ((Fun {<.z, w>. | w = (F` z)} /\ A e. V) -> ({<.z, w>. | w = (F` z)} |` A) e. V)
1310, 11, 12mp2an 697 . . 3 |- ({<.z, w>. | w = (F` z)} |` A) e. V
1413fvclex 3856 . 2 |- {y | E.x y = (({<.z, w>. | w = (F` z)} |` A)` x)} e. V
159, 14eqeltrr 1545 1 |- {y | E.x y = ((F |` A)` x)} e. V
Colors of variables: wff set class
Syntax hints:   = wceq 956   e. wcel 958  E.wex 980  {cab 1463  Vcvv 1811  {copab 2666   |` cres 3172  Fun wfun 3176  ` cfv 3182
This theorem is referenced by:  abrexexlem1 3858
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-rep 2693  ax-sep 2703  ax-pow 2742  ax-pr 2779  ax-un 2866
This theorem depends on definitions:  df-bi 147  df-or 224  df-an 225  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-ral 1649  df-rex 1650  df-v 1812  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-id 2835  df-xp 3184  df-rel 3185  df-cnv 3186  df-co 3187  df-dm 3188  df-rn 3189  df-res 3190  df-ima 3191  df-fun 3192  df-fv 3198
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