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Theorem fafv2elcdm 47547
Description: An alternate function value belongs to the codomain of the function, analogous to ffvelcdm 7028. (Contributed by AV, 2-Sep-2022.)
Assertion
Ref Expression
fafv2elcdm ((𝐹:𝐴𝐵𝐶𝐴) → (𝐹''''𝐶) ∈ 𝐵)

Proof of Theorem fafv2elcdm
StepHypRef Expression
1 ffn 6663 . . 3 (𝐹:𝐴𝐵𝐹 Fn 𝐴)
2 fnafv2elrn 47546 . . 3 ((𝐹 Fn 𝐴𝐶𝐴) → (𝐹''''𝐶) ∈ ran 𝐹)
31, 2sylan 581 . 2 ((𝐹:𝐴𝐵𝐶𝐴) → (𝐹''''𝐶) ∈ ran 𝐹)
4 frn 6670 . . . 4 (𝐹:𝐴𝐵 → ran 𝐹𝐵)
54sseld 3933 . . 3 (𝐹:𝐴𝐵 → ((𝐹''''𝐶) ∈ ran 𝐹 → (𝐹''''𝐶) ∈ 𝐵))
65adantr 480 . 2 ((𝐹:𝐴𝐵𝐶𝐴) → ((𝐹''''𝐶) ∈ ran 𝐹 → (𝐹''''𝐶) ∈ 𝐵))
73, 6mpd 15 1 ((𝐹:𝐴𝐵𝐶𝐴) → (𝐹''''𝐶) ∈ 𝐵)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395  wcel 2114  ran crn 5626   Fn wfn 6488  wf 6489  ''''cafv2 47521
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-12 2185  ax-ext 2709  ax-sep 5242  ax-nul 5252  ax-pr 5378  ax-un 7682
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2540  df-eu 2570  df-clab 2716  df-cleq 2729  df-clel 2812  df-ne 2934  df-nel 3038  df-ral 3053  df-rex 3062  df-rab 3401  df-v 3443  df-dif 3905  df-un 3907  df-in 3909  df-ss 3919  df-nul 4287  df-if 4481  df-pw 4557  df-sn 4582  df-pr 4584  df-op 4588  df-uni 4865  df-br 5100  df-opab 5162  df-id 5520  df-xp 5631  df-rel 5632  df-cnv 5633  df-co 5634  df-dm 5635  df-rn 5636  df-res 5637  df-iota 6449  df-fun 6495  df-fn 6496  df-f 6497  df-dfat 47432  df-afv2 47522
This theorem is referenced by: (None)
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