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Theorem findfvcl 37079
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 → ((𝐹𝑦) ∈ 𝑃 → (𝐹‘suc 𝑦) ∈ 𝑃)))
Assertion
Ref Expression
findfvcl (𝐴 ∈ ω → (𝜑 → (𝐹𝐴) ∈ 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 37078 . 2 (𝑥 = ∅ → ((𝜑 → (𝐹𝑥) ∈ 𝑃) ↔ (𝜑 → (𝐹‘∅) ∈ 𝑃)))
2 fveleq 37078 . 2 (𝑥 = 𝑦 → ((𝜑 → (𝐹𝑥) ∈ 𝑃) ↔ (𝜑 → (𝐹𝑦) ∈ 𝑃)))
3 fveleq 37078 . 2 (𝑥 = suc 𝑦 → ((𝜑 → (𝐹𝑥) ∈ 𝑃) ↔ (𝜑 → (𝐹‘suc 𝑦) ∈ 𝑃)))
4 fveleq 37078 . 2 (𝑥 = 𝐴 → ((𝜑 → (𝐹𝑥) ∈ 𝑃) ↔ (𝜑 → (𝐹𝐴) ∈ 𝑃)))
5 findfvcl.1 . 2 (𝜑 → (𝐹‘∅) ∈ 𝑃)
6 findfvcl.2 . . 3 (𝑦 ∈ ω → (𝜑 → ((𝐹𝑦) ∈ 𝑃 → (𝐹‘suc 𝑦) ∈ 𝑃)))
76a2d 30 . 2 (𝑦 ∈ ω → ((𝜑 → (𝐹𝑦) ∈ 𝑃) → (𝜑 → (𝐹‘suc 𝑦) ∈ 𝑃)))
81, 2, 3, 4, 5, 7finds 7897 1 (𝐴 ∈ ω → (𝜑 → (𝐹𝐴) ∈ 𝑃))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4  wcel 2145  c0 4282  suc csuc 6363  cfv 6537  ωcom 7866
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-ext 2734  ax-sep 5255  ax-nul 5267  ax-pr 5402  ax-un 7740
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3or 1104  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-sb 2100  df-clab 2741  df-cleq 2754  df-clel 2837  df-ne 2958  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-pss 3922  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-tr 5217  df-eprel 5559  df-po 5567  df-so 5568  df-fr 5612  df-we 5614  df-ord 6364  df-on 6365  df-lim 6366  df-suc 6367  df-iota 6493  df-fv 6545  df-om 7867
This theorem is used by:  findreccl  37080
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