Theorem hsmexlem9 9584

Description: Lemma for hsmex 9591. Properties of the recurrent sequence of ordinals. (Contributed by Stefan O'Rear, 14-Feb-2015.)

Hypothesis

Ref	Expression
hsmexlem7.h	⊢ 𝐻 = (rec((𝑧 ∈ V ↦ (har‘𝒫 (𝑋 × 𝑧))), (har‘𝒫 𝑋)) ↾ ω)

Assertion

Ref	Expression
hsmexlem9	⊢ (𝑎 ∈ ω → (𝐻‘𝑎) ∈ On)

Distinct variable groups:   𝑧,𝑋   𝑧,𝑎

Allowed substitution hints:   𝐻(𝑧,𝑎)   𝑋(𝑎)

Proof of Theorem hsmexlem9

Dummy variable 𝑏 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		nn0suc 7370	. 2 ⊢ (𝑎 ∈ ω → (𝑎 = ∅ ∨ ∃𝑏 ∈ ω 𝑎 = suc 𝑏))
2		fveq2 6448	. . . 4 ⊢ (𝑎 = ∅ → (𝐻‘𝑎) = (𝐻‘∅))
3		hsmexlem7.h	. . . . . 6 ⊢ 𝐻 = (rec((𝑧 ∈ V ↦ (har‘𝒫 (𝑋 × 𝑧))), (har‘𝒫 𝑋)) ↾ ω)
4	3	hsmexlem7 9582	. . . . 5 ⊢ (𝐻‘∅) = (har‘𝒫 𝑋)
5		harcl 8757	. . . . 5 ⊢ (har‘𝒫 𝑋) ∈ On
6	4, 5	eqeltri 2855	. . . 4 ⊢ (𝐻‘∅) ∈ On
7	2, 6	syl6eqel 2867	. . 3 ⊢ (𝑎 = ∅ → (𝐻‘𝑎) ∈ On)
8	3	hsmexlem8 9583	. . . . . 6 ⊢ (𝑏 ∈ ω → (𝐻‘suc 𝑏) = (har‘𝒫 (𝑋 × (𝐻‘𝑏))))
9		harcl 8757	. . . . . 6 ⊢ (har‘𝒫 (𝑋 × (𝐻‘𝑏))) ∈ On
10	8, 9	syl6eqel 2867	. . . . 5 ⊢ (𝑏 ∈ ω → (𝐻‘suc 𝑏) ∈ On)
11		fveq2 6448	. . . . . 6 ⊢ (𝑎 = suc 𝑏 → (𝐻‘𝑎) = (𝐻‘suc 𝑏))
12	11	eleq1d 2844	. . . . 5 ⊢ (𝑎 = suc 𝑏 → ((𝐻‘𝑎) ∈ On ↔ (𝐻‘suc 𝑏) ∈ On))
13	10, 12	syl5ibrcom 239	. . . 4 ⊢ (𝑏 ∈ ω → (𝑎 = suc 𝑏 → (𝐻‘𝑎) ∈ On))
14	13	rexlimiv 3209	. . 3 ⊢ (∃𝑏 ∈ ω 𝑎 = suc 𝑏 → (𝐻‘𝑎) ∈ On)
15	7, 14	jaoi 846	. 2 ⊢ ((𝑎 = ∅ ∨ ∃𝑏 ∈ ω 𝑎 = suc 𝑏) → (𝐻‘𝑎) ∈ On)
16	1, 15	syl 17	1 ⊢ (𝑎 ∈ ω → (𝐻‘𝑎) ∈ On)

Syntax hints:   → wi 4   ∨ wo 836   = wceq 1601   ∈ wcel 2107  ∃wrex 3091  Vcvv 3398  ∅c0 4141  𝒫 cpw 4379   ↦ cmpt 4967   × cxp 5355   ↾ cres 5359  Oncon0 5978  suc csuc 5980  ‘cfv 6137  ωcom 7345  reccrdg 7790  harchar 8752

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1839  ax-4 1853  ax-5 1953  ax-6 2021  ax-7 2055  ax-8 2109  ax-9 2116  ax-10 2135  ax-11 2150  ax-12 2163  ax-13 2334  ax-ext 2754  ax-rep 5008  ax-sep 5019  ax-nul 5027  ax-pow 5079  ax-pr 5140  ax-un 7228

This theorem depends on definitions:  df-bi 199  df-an 387  df-or 837  df-3or 1072  df-3an 1073  df-tru 1605  df-ex 1824  df-nf 1828  df-sb 2012  df-mo 2551  df-eu 2587  df-clab 2764  df-cleq 2770  df-clel 2774  df-nfc 2921  df-ne 2970  df-ral 3095  df-rex 3096  df-reu 3097  df-rmo 3098  df-rab 3099  df-v 3400  df-sbc 3653  df-csb 3752  df-dif 3795  df-un 3797  df-in 3799  df-ss 3806  df-pss 3808  df-nul 4142  df-if 4308  df-pw 4381  df-sn 4399  df-pr 4401  df-tp 4403  df-op 4405  df-uni 4674  df-iun 4757  df-br 4889  df-opab 4951  df-mpt 4968  df-tr 4990  df-id 5263  df-eprel 5268  df-po 5276  df-so 5277  df-fr 5316  df-se 5317  df-we 5318  df-xp 5363  df-rel 5364  df-cnv 5365  df-co 5366  df-dm 5367  df-rn 5368  df-res 5369  df-ima 5370  df-pred 5935  df-ord 5981  df-on 5982  df-lim 5983  df-suc 5984  df-iota 6101  df-fun 6139  df-fn 6140  df-f 6141  df-f1 6142  df-fo 6143  df-f1o 6144  df-fv 6145  df-isom 6146  df-riota 6885  df-om 7346  df-wrecs 7691  df-recs 7753  df-rdg 7791  df-en 8244  df-dom 8245  df-oi 8706  df-har 8754

This theorem is referenced by:  hsmexlem4  9588  hsmexlem5  9589