Theorem setis 44793

Description: Version of setrec2 44791 expressed as an induction schema. This theorem is a generalization of tfis3 7566. (Contributed by Emmett Weisz, 27-Feb-2022.)

Hypotheses

Ref	Expression
setis.1	⊢ 𝐵 = setrecs(𝐹)
setis.2	⊢ (𝑏 = 𝐴 → (𝜓 ↔ 𝜒))
setis.3	⊢ (𝜑 → ∀𝑎(∀𝑏 ∈ 𝑎 𝜓 → ∀𝑏 ∈ (𝐹‘𝑎)𝜓))

Assertion

Ref	Expression
setis	⊢ (𝜑 → (𝐴 ∈ 𝐵 → 𝜒))

Distinct variable groups:   𝐹,𝑎,𝑏   𝜓,𝑎   𝜒,𝑏   𝐴,𝑏

Allowed substitution hints:   𝜑(𝑎,𝑏)   𝜓(𝑏)   𝜒(𝑎)   𝐴(𝑎)   𝐵(𝑎,𝑏)

Proof of Theorem setis

Step	Hyp	Ref	Expression
1		setis.1	. . . 4 ⊢ 𝐵 = setrecs(𝐹)
2		setis.3	. . . . 5 ⊢ (𝜑 → ∀𝑎(∀𝑏 ∈ 𝑎 𝜓 → ∀𝑏 ∈ (𝐹‘𝑎)𝜓))
3		ssabral 4042	. . . . . . 7 ⊢ (𝑎 ⊆ {𝑏 ∣ 𝜓} ↔ ∀𝑏 ∈ 𝑎 𝜓)
4		ssabral 4042	. . . . . . 7 ⊢ ((𝐹‘𝑎) ⊆ {𝑏 ∣ 𝜓} ↔ ∀𝑏 ∈ (𝐹‘𝑎)𝜓)
5	3, 4	imbi12i 353	. . . . . 6 ⊢ ((𝑎 ⊆ {𝑏 ∣ 𝜓} → (𝐹‘𝑎) ⊆ {𝑏 ∣ 𝜓}) ↔ (∀𝑏 ∈ 𝑎 𝜓 → ∀𝑏 ∈ (𝐹‘𝑎)𝜓))
6	5	albii 1816	. . . . 5 ⊢ (∀𝑎(𝑎 ⊆ {𝑏 ∣ 𝜓} → (𝐹‘𝑎) ⊆ {𝑏 ∣ 𝜓}) ↔ ∀𝑎(∀𝑏 ∈ 𝑎 𝜓 → ∀𝑏 ∈ (𝐹‘𝑎)𝜓))
7	2, 6	sylibr 236	. . . 4 ⊢ (𝜑 → ∀𝑎(𝑎 ⊆ {𝑏 ∣ 𝜓} → (𝐹‘𝑎) ⊆ {𝑏 ∣ 𝜓}))
8	1, 7	setrec2v 44792	. . 3 ⊢ (𝜑 → 𝐵 ⊆ {𝑏 ∣ 𝜓})
9	8	sseld 3966	. 2 ⊢ (𝜑 → (𝐴 ∈ 𝐵 → 𝐴 ∈ {𝑏 ∣ 𝜓}))
10		setis.2	. . 3 ⊢ (𝑏 = 𝐴 → (𝜓 ↔ 𝜒))
11	10	elabg 3666	. 2 ⊢ (𝐴 ∈ 𝐵 → (𝐴 ∈ {𝑏 ∣ 𝜓} ↔ 𝜒))
12	9, 11	mpbidi 243	1 ⊢ (𝜑 → (𝐴 ∈ 𝐵 → 𝜒))

Syntax hints:   → wi 4   ↔ wb 208  ∀wal 1531   = wceq 1533   ∈ wcel 2110  {cab 2799  ∀wral 3138   ⊆ wss 3936  ‘cfv 6350  setrecscsetrecs 44779

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1907  ax-6 1966  ax-7 2011  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2156  ax-12 2172  ax-ext 2793  ax-rep 5183  ax-sep 5196  ax-nul 5203  ax-pow 5259  ax-pr 5322  ax-un 7455

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1536  df-ex 1777  df-nf 1781  df-sb 2066  df-mo 2618  df-eu 2650  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ne 3017  df-ral 3143  df-rex 3144  df-rab 3147  df-v 3497  df-sbc 3773  df-dif 3939  df-un 3941  df-in 3943  df-ss 3952  df-nul 4292  df-if 4468  df-pw 4541  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4833  df-br 5060  df-opab 5122  df-id 5455  df-xp 5556  df-rel 5557  df-cnv 5558  df-co 5559  df-dm 5560  df-rn 5561  df-res 5562  df-ima 5563  df-iota 6309  df-fun 6352  df-fv 6358  df-setrecs 44780

This theorem is referenced by: (None)