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Theorem fnovex 5558
Description: The result of an operation is a set. (Contributed by Jim Kingdon, 15-Jan-2019.)
Assertion
Ref Expression
fnovex ((𝐹 Fn (𝐶 × 𝐷) ∧ 𝐴𝐶𝐵𝐷) → (𝐴𝐹𝐵) ∈ V)

Proof of Theorem fnovex
StepHypRef Expression
1 df-ov 5535 . 2 (𝐴𝐹𝐵) = (𝐹‘⟨𝐴, 𝐵⟩)
2 opelxp 4392 . . . 4 (⟨𝐴, 𝐵⟩ ∈ (𝐶 × 𝐷) ↔ (𝐴𝐶𝐵𝐷))
3 funfvex 5212 . . . . 5 ((Fun 𝐹 ∧ ⟨𝐴, 𝐵⟩ ∈ dom 𝐹) → (𝐹‘⟨𝐴, 𝐵⟩) ∈ V)
43funfni 5019 . . . 4 ((𝐹 Fn (𝐶 × 𝐷) ∧ ⟨𝐴, 𝐵⟩ ∈ (𝐶 × 𝐷)) → (𝐹‘⟨𝐴, 𝐵⟩) ∈ V)
52, 4sylan2br 282 . . 3 ((𝐹 Fn (𝐶 × 𝐷) ∧ (𝐴𝐶𝐵𝐷)) → (𝐹‘⟨𝐴, 𝐵⟩) ∈ V)
653impb 1134 . 2 ((𝐹 Fn (𝐶 × 𝐷) ∧ 𝐴𝐶𝐵𝐷) → (𝐹‘⟨𝐴, 𝐵⟩) ∈ V)
71, 6syl5eqel 2165 1 ((𝐹 Fn (𝐶 × 𝐷) ∧ 𝐴𝐶𝐵𝐷) → (𝐴𝐹𝐵) ∈ V)
Colors of variables: wff set class
Syntax hints:  wi 4  wa 102  w3a 919  wcel 1433  Vcvv 2601  cop 3401   × cxp 4361   Fn wfn 4917  cfv 4922  (class class class)co 5532
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-io 662  ax-5 1376  ax-7 1377  ax-gen 1378  ax-ie1 1422  ax-ie2 1423  ax-8 1435  ax-10 1436  ax-11 1437  ax-i12 1438  ax-bndl 1439  ax-4 1440  ax-14 1445  ax-17 1459  ax-i9 1463  ax-ial 1467  ax-i5r 1468  ax-ext 2063  ax-sep 3896  ax-pow 3948  ax-pr 3964
This theorem depends on definitions:  df-bi 115  df-3an 921  df-tru 1287  df-nf 1390  df-sb 1686  df-eu 1944  df-mo 1945  df-clab 2068  df-cleq 2074  df-clel 2077  df-nfc 2208  df-ral 2353  df-rex 2354  df-v 2603  df-sbc 2816  df-un 2977  df-in 2979  df-ss 2986  df-pw 3384  df-sn 3404  df-pr 3405  df-op 3407  df-uni 3602  df-br 3786  df-opab 3840  df-id 4048  df-xp 4369  df-cnv 4371  df-co 4372  df-dm 4373  df-iota 4887  df-fun 4924  df-fn 4925  df-fv 4930  df-ov 5535
This theorem is referenced by:  ovelrn  5669  fnofval  5741  fzen  9062
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