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Theorem findfvcl 37332
Description: Please add description here. (Contributed by Jeff Hoffman, 12-Feb-2008.)
Hypotheses
Ref Expression
findfvcl.1 (𝜑 → (𝐹‘∅) ∈ 𝑃)
findfvcl.2 (𝑦 ∈ ω → (𝜑 → ((𝐹‘𝑦) ∈ 𝑃 → (𝐹‘suc 𝑦) ∈ 𝑃)))
Assertion
Ref Expression
findfvcl (𝐴 ∈ ω → (𝜑 → (𝐹‘𝐴) ∈ 𝑃))
Distinct variable groups:   𝑦,𝐹   𝑦,𝑃   𝜑,𝑦
Allowed substitution hint:   𝐴(𝑦)

Proof of Theorem findfvcl
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 fveleq 37331 . 2 (𝑥 = ∅ → ((𝜑 → (𝐹‘𝑥) ∈ 𝑃) ↔ (𝜑 → (𝐹‘∅) ∈ 𝑃)))
2 fveleq 37331 . 2 (𝑥 = 𝑦 → ((𝜑 → (𝐹‘𝑥) ∈ 𝑃) ↔ (𝜑 → (𝐹‘𝑦) ∈ 𝑃)))
3 fveleq 37331 . 2 (𝑥 = suc 𝑦 → ((𝜑 → (𝐹‘𝑥) ∈ 𝑃) ↔ (𝜑 → (𝐹‘suc 𝑦) ∈ 𝑃)))
4 fveleq 37331 . 2 (𝑥 = 𝐴 → ((𝜑 → (𝐹‘𝑥) ∈ 𝑃) ↔ (𝜑 → (𝐹‘𝐴) ∈ 𝑃)))
5 findfvcl.1 . 2 (𝜑 → (𝐹‘∅) ∈ 𝑃)
6 findfvcl.2 . . 3 (𝑦 ∈ ω → (𝜑 → ((𝐹‘𝑦) ∈ 𝑃 → (𝐹‘suc 𝑦) ∈ 𝑃)))
76a2d 30 . 2 (𝑦 ∈ ω → ((𝜑 → (𝐹‘𝑦) ∈ 𝑃) → (𝜑 → (𝐹‘suc 𝑦) ∈ 𝑃)))
81, 2, 3, 4, 5, 7finds 7908 1 (𝐴 ∈ ω → (𝜑 → (𝐹‘𝐴) ∈ 𝑃))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ∈ wcel 2144  ∅c0 4278  suc csuc 6364  ‘cfv 6538  ωcom 7877
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1942  ax-6 1999  ax-7 2040  ax-8 2146  ax-9 2154  ax-ext 2732  ax-sep 5248  ax-nul 5259  ax-pr 5390  ax-un 7751
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3or 1104  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-sb 2099  df-clab 2739  df-cleq 2752  df-clel 2835  df-ne 2956  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-ss 3896  df-pss 4014  df-dif 4047  df-in 4091  df-un 4151  df-nul 4279  df-if 4482  df-pw 4558  df-sn 4585  df-pr 4587  df-op 4835  df-uni 4867  df-br 5103  df-opab 5167  df-tr 5212  df-eprel 5550  df-po 5558  df-so 5559  df-fr 5603  df-we 5605  df-ord 6365  df-on 6366  df-lim 6367  df-suc 6368  df-iota 6494  df-fv 6546  df-om 7878
This theorem is used by:  findreccl  37333
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