Theorem hsmexlem9 10322

Description: Lemma for hsmex 10329. 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 7830	. 2 ⊢ (𝑎 ∈ ω → (𝑎 = ∅ ∨ ∃𝑏 ∈ ω 𝑎 = suc 𝑏))
2		fveq2 6828	. . . 4 ⊢ (𝑎 = ∅ → (𝐻‘𝑎) = (𝐻‘∅))
3		hsmexlem7.h	. . . . . 6 ⊢ 𝐻 = (rec((𝑧 ∈ V ↦ (har‘𝒫 (𝑋 × 𝑧))), (har‘𝒫 𝑋)) ↾ ω)
4	3	hsmexlem7 10320	. . . . 5 ⊢ (𝐻‘∅) = (har‘𝒫 𝑋)
5		harcl 9451	. . . . 5 ⊢ (har‘𝒫 𝑋) ∈ On
6	4, 5	eqeltri 2827	. . . 4 ⊢ (𝐻‘∅) ∈ On
7	2, 6	eqeltrdi 2839	. . 3 ⊢ (𝑎 = ∅ → (𝐻‘𝑎) ∈ On)
8	3	hsmexlem8 10321	. . . . . 6 ⊢ (𝑏 ∈ ω → (𝐻‘suc 𝑏) = (har‘𝒫 (𝑋 × (𝐻‘𝑏))))
9		harcl 9451	. . . . . 6 ⊢ (har‘𝒫 (𝑋 × (𝐻‘𝑏))) ∈ On
10	8, 9	eqeltrdi 2839	. . . . 5 ⊢ (𝑏 ∈ ω → (𝐻‘suc 𝑏) ∈ On)
11		fveq2 6828	. . . . . 6 ⊢ (𝑎 = suc 𝑏 → (𝐻‘𝑎) = (𝐻‘suc 𝑏))
12	11	eleq1d 2816	. . . . 5 ⊢ (𝑎 = suc 𝑏 → ((𝐻‘𝑎) ∈ On ↔ (𝐻‘suc 𝑏) ∈ On))
13	10, 12	syl5ibrcom 247	. . . 4 ⊢ (𝑏 ∈ ω → (𝑎 = suc 𝑏 → (𝐻‘𝑎) ∈ On))
14	13	rexlimiv 3126	. . 3 ⊢ (∃𝑏 ∈ ω 𝑎 = suc 𝑏 → (𝐻‘𝑎) ∈ On)
15	7, 14	jaoi 857	. 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 847   = wceq 1541   ∈ wcel 2111  ∃wrex 3056  Vcvv 3436  ∅c0 4282  𝒫 cpw 4549   ↦ cmpt 5174   × cxp 5617   ↾ cres 5621  Oncon0 6312  suc csuc 6314  ‘cfv 6487  ωcom 7802  reccrdg 8334  harchar 9448

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2113  ax-9 2121  ax-10 2144  ax-11 2160  ax-12 2180  ax-ext 2703  ax-rep 5219  ax-sep 5236  ax-nul 5246  ax-pow 5305  ax-pr 5372  ax-un 7674

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2535  df-eu 2564  df-clab 2710  df-cleq 2723  df-clel 2806  df-nfc 2881  df-ne 2929  df-ral 3048  df-rex 3057  df-rmo 3346  df-reu 3347  df-rab 3396  df-v 3438  df-sbc 3737  df-csb 3846  df-dif 3900  df-un 3902  df-in 3904  df-ss 3914  df-pss 3917  df-nul 4283  df-if 4475  df-pw 4551  df-sn 4576  df-pr 4578  df-op 4582  df-uni 4859  df-iun 4943  df-br 5094  df-opab 5156  df-mpt 5175  df-tr 5201  df-id 5514  df-eprel 5519  df-po 5527  df-so 5528  df-fr 5572  df-se 5573  df-we 5574  df-xp 5625  df-rel 5626  df-cnv 5627  df-co 5628  df-dm 5629  df-rn 5630  df-res 5631  df-ima 5632  df-pred 6254  df-ord 6315  df-on 6316  df-lim 6317  df-suc 6318  df-iota 6443  df-fun 6489  df-fn 6490  df-f 6491  df-f1 6492  df-fo 6493  df-f1o 6494  df-fv 6495  df-isom 6496  df-riota 7309  df-ov 7355  df-om 7803  df-2nd 7928  df-frecs 8217  df-wrecs 8248  df-recs 8297  df-rdg 8335  df-en 8876  df-dom 8877  df-oi 9402  df-har 9449

This theorem is referenced by:  hsmexlem4  10326  hsmexlem5  10327