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Theorem funfvima2 2905
Description: A function's value in an included pre-image belongs to the image.
Assertion
Ref Expression
funfvima2 |- ((Fun F /\ A (_ dom F) -> (B e. A -> (F` B) e. (F"A)))

Proof of Theorem funfvima2
StepHypRef Expression
1 funfvima 2904 . . . . . 6 |- ((Fun F /\ B e. dom F) -> (B e. A -> (F` B) e. (F"A)))
21exp 291 . . . . 5 |- (Fun F -> (B e. dom F -> (B e. A -> (F` B) e. (F"A))))
32com23 32 . . . 4 |- (Fun F -> (B e. A -> (B e. dom F -> (F` B) e. (F"A))))
43a2d 15 . . 3 |- (Fun F -> ((B e. A -> B e. dom F) -> (B e. A -> (F` B) e. (F"A))))
5 ssel 1502 . . 3 |- (A (_ dom F -> (B e. A -> B e. dom F))
64, 5syl5 22 . 2 |- (Fun F -> (A (_ dom F -> (B e. A -> (F` B) e. (F"A))))
76imp 277 1 |- ((Fun F /\ A (_ dom F) -> (B e. A -> (F` B) e. (F"A)))
Colors of variables: wff set class
Syntax hints:   -> wi 2   /\ wa 196   e. wcel 1092   (_ wss 1487  dom cdm 2410  "cima 2413  Fun wfun 2416  ` cfv 2422
This theorem is referenced by:  f1oweOLD 2944  tz7.49 2997  php3 3411  zornlem2 3604
This theorem was proved from axioms:  ax-1 3  ax-2 4  ax-3 5  ax-mp 6  ax-4 673  ax-5 674  ax-6 675  ax-7 676  ax-gen 677  ax-8 798  ax-9 799  ax-10 800  ax-11 801  ax-12 802  ax-13 804  ax-14 805  ax-16 922  ax-17 925  ax-ext 1074  ax-rep 1075  ax-un 1076  ax-pow 1077
This theorem depends on definitions:  df-bi 128  df-or 197  df-an 198  df-ex 679  df-sb 853  df-eu 1009  df-mo 1010  df-clab 1093  df-cleq 1097  df-clel 1099  df-rex 1206  df-v 1349  df-dif 1489  df-un 1490  df-in 1491  df-ss 1492  df-nul 1708  df-pw 1799  df-sn 1811  df-pr 1812  df-op 1815  df-uni 1920  df-br 2063  df-opab 2098  df-id 2125  df-xp 2424  df-rel 2425  df-cnv 2426  df-co 2427  df-dm 2428  df-rn 2429  df-res 2430  df-ima 2431  df-fun 2432  df-fn 2433  df-fv 2438
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