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Theorem fv2prc 5678
Description: A function value of a function value at a proper class is the empty set. (Contributed by AV, 8-Apr-2021.)
Assertion
Ref Expression
fv2prc  |-  ( -.  A  e.  _V  ->  ( ( F `  A
) `  B )  =  (/) )

Proof of Theorem fv2prc
StepHypRef Expression
1 fvprc 5633 . . 3  |-  ( -.  A  e.  _V  ->  ( F `  A )  =  (/) )
21fveq1d 5641 . 2  |-  ( -.  A  e.  _V  ->  ( ( F `  A
) `  B )  =  ( (/) `  B
) )
3 0fv 5677 . 2  |-  ( (/) `  B )  =  (/)
42, 3eqtrdi 2280 1  |-  ( -.  A  e.  _V  ->  ( ( F `  A
) `  B )  =  (/) )
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4    = wceq 1397    e. wcel 2202   _Vcvv 2802   (/)c0 3494   ` cfv 5326
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 619  ax-in2 620  ax-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-setind 4635
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-fal 1403  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ne 2403  df-ral 2515  df-rex 2516  df-v 2804  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-nul 3495  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-br 4089  df-iota 5286  df-fv 5334
This theorem is referenced by: (None)
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