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Theorem fafv2elcdm 48107
Description: An alternate function value belongs to the codomain of the function, analogous to ffvelcdm 7077. (Contributed by AV, 2-Sep-2022.)
Assertion
Ref Expression
fafv2elcdm ((𝐹:𝐴𝐵𝐶𝐴) → (𝐹''''𝐶) ∈ 𝐵)

Proof of Theorem fafv2elcdm
StepHypRef Expression
1 ffn 6706 . . 3 (𝐹:𝐴𝐵𝐹 Fn 𝐴)
2 fnafv2elrn 48106 . . 3 ((𝐹 Fn 𝐴𝐶𝐴) → (𝐹''''𝐶) ∈ ran 𝐹)
31, 2sylan 592 . 2 ((𝐹:𝐴𝐵𝐶𝐴) → (𝐹''''𝐶) ∈ ran 𝐹)
4 frn 6714 . . . 4 (𝐹:𝐴𝐵 → ran 𝐹𝐵)
54sseld 3933 . . 3 (𝐹:𝐴𝐵 → ((𝐹''''𝐶) ∈ ran 𝐹 → (𝐹''''𝐶) ∈ 𝐵))
65adantr 486 . 2 ((𝐹:𝐴𝐵𝐶𝐴) → ((𝐹''''𝐶) ∈ ran 𝐹 → (𝐹''''𝐶) ∈ 𝐵))
73, 6mpd 16 1 ((𝐹:𝐴𝐵𝐶𝐴) → (𝐹''''𝐶) ∈ 𝐵)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4  wa 401  wcel 2145  ran crn 5660   Fn wfn 6532  wf 6533  ''''cafv2 48081
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-10 2178  ax-12 2215  ax-ext 2734  ax-sep 5255  ax-nul 5267  ax-pr 5402
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2566  df-eu 2596  df-clab 2741  df-cleq 2754  df-clel 2837  df-ne 2958  df-nel 3064  df-ral 3079  df-rex 3089  df-rab 3415  df-v 3455  df-dif 3905  df-un 3907  df-in 3909  df-ss 3919  df-nul 4283  df-if 4486  df-pw 4562  df-sn 4588  df-pr 4590  df-op 4594  df-uni 4871  df-br 5108  df-opab 5172  df-id 5554  df-xp 5665  df-rel 5666  df-cnv 5667  df-co 5668  df-dm 5669  df-rn 5670  df-res 5671  df-iota 6493  df-fun 6539  df-fn 6540  df-f 6541  df-dfat 47992  df-afv2 48082
This theorem is used by: (None)
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