Theorem cnfcom3 9151

Description: Any infinite ordinal 𝐵 is equinumerous to a power of ω. (We are being careful here to show explicit bijections rather than simple equinumerosity because we want a uniform construction for cnfcom3c 9153.) (Contributed by Mario Carneiro, 28-May-2015.) (Revised by AV, 4-Jul-2019.)

Hypotheses

Ref	Expression
cnfcom.s	⊢ 𝑆 = dom (ω CNF 𝐴)
cnfcom.a	⊢ (𝜑 → 𝐴 ∈ On)
cnfcom.b	⊢ (𝜑 → 𝐵 ∈ (ω ↑o 𝐴))
cnfcom.f	⊢ 𝐹 = (◡(ω CNF 𝐴)‘𝐵)
cnfcom.g	⊢ 𝐺 = OrdIso( E , (𝐹 supp ∅))
cnfcom.h	⊢ 𝐻 = seqω((𝑘 ∈ V, 𝑧 ∈ V ↦ (𝑀 +o 𝑧)), ∅)
cnfcom.t	⊢ 𝑇 = seqω((𝑘 ∈ V, 𝑓 ∈ V ↦ 𝐾), ∅)
cnfcom.m	⊢ 𝑀 = ((ω ↑o (𝐺‘𝑘)) ·o (𝐹‘(𝐺‘𝑘)))
cnfcom.k	⊢ 𝐾 = ((𝑥 ∈ 𝑀 ↦ (dom 𝑓 +o 𝑥)) ∪ ◡(𝑥 ∈ dom 𝑓 ↦ (𝑀 +o 𝑥)))
cnfcom.w	⊢ 𝑊 = (𝐺‘∪ dom 𝐺)
cnfcom3.1	⊢ (𝜑 → ω ⊆ 𝐵)
cnfcom.x	⊢ 𝑋 = (𝑢 ∈ (𝐹‘𝑊), 𝑣 ∈ (ω ↑o 𝑊) ↦ (((𝐹‘𝑊) ·o 𝑣) +o 𝑢))
cnfcom.y	⊢ 𝑌 = (𝑢 ∈ (𝐹‘𝑊), 𝑣 ∈ (ω ↑o 𝑊) ↦ (((ω ↑o 𝑊) ·o 𝑢) +o 𝑣))
cnfcom.n	⊢ 𝑁 = ((𝑋 ∘ ◡𝑌) ∘ (𝑇‘dom 𝐺))

Assertion

Ref	Expression
cnfcom3	⊢ (𝜑 → 𝑁:𝐵–1-1-onto→(ω ↑o 𝑊))

Distinct variable groups:   𝑥,𝑘,𝑧,𝐴   𝑢,𝑘,𝑣,𝑥,𝑧   𝑥,𝑀   𝜑,𝑢,𝑣   𝑓,𝑘,𝑢,𝑣,𝑥,𝑧,𝐹   𝑢,𝐾,𝑣   𝑢,𝑇,𝑣,𝑧   𝑢,𝑊,𝑣,𝑥   𝑓,𝐺,𝑘,𝑢,𝑣,𝑥,𝑧   𝑓,𝐻,𝑢,𝑣,𝑥   𝑆,𝑘,𝑧   𝜑,𝑘,𝑥,𝑧

Allowed substitution hints:   𝜑(𝑓)   𝐴(𝑣,𝑢,𝑓)   𝐵(𝑥,𝑧,𝑣,𝑢,𝑓,𝑘)   𝑆(𝑥,𝑣,𝑢,𝑓)   𝑇(𝑥,𝑓,𝑘)   𝐻(𝑧,𝑘)   𝐾(𝑥,𝑧,𝑓,𝑘)   𝑀(𝑧,𝑣,𝑢,𝑓,𝑘)   𝑁(𝑥,𝑧,𝑣,𝑢,𝑓,𝑘)   𝑊(𝑧,𝑓,𝑘)   𝑋(𝑥,𝑧,𝑣,𝑢,𝑓,𝑘)   𝑌(𝑥,𝑧,𝑣,𝑢,𝑓,𝑘)

Proof of Theorem cnfcom3

Step	Hyp	Ref	Expression
1		omelon 9093	. . . . . 6 ⊢ ω ∈ On
2		cnfcom.a	. . . . . . 7 ⊢ (𝜑 → 𝐴 ∈ On)
3		suppssdm 7826	. . . . . . . . 9 ⊢ (𝐹 supp ∅) ⊆ dom 𝐹
4		cnfcom.f	. . . . . . . . . . . 12 ⊢ 𝐹 = (◡(ω CNF 𝐴)‘𝐵)
5		cnfcom.s	. . . . . . . . . . . . . . 15 ⊢ 𝑆 = dom (ω CNF 𝐴)
6	1	a1i 11	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → ω ∈ On)
7	5, 6, 2	cantnff1o 9143	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (ω CNF 𝐴):𝑆–1-1-onto→(ω ↑o 𝐴))
8		f1ocnv 6602	. . . . . . . . . . . . . 14 ⊢ ((ω CNF 𝐴):𝑆–1-1-onto→(ω ↑o 𝐴) → ◡(ω CNF 𝐴):(ω ↑o 𝐴)–1-1-onto→𝑆)
9		f1of 6590	. . . . . . . . . . . . . 14 ⊢ (◡(ω CNF 𝐴):(ω ↑o 𝐴)–1-1-onto→𝑆 → ◡(ω CNF 𝐴):(ω ↑o 𝐴)⟶𝑆)
10	7, 8, 9	3syl 18	. . . . . . . . . . . . 13 ⊢ (𝜑 → ◡(ω CNF 𝐴):(ω ↑o 𝐴)⟶𝑆)
11		cnfcom.b	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝐵 ∈ (ω ↑o 𝐴))
12	10, 11	ffvelrnd 6829	. . . . . . . . . . . 12 ⊢ (𝜑 → (◡(ω CNF 𝐴)‘𝐵) ∈ 𝑆)
13	4, 12	eqeltrid 2894	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐹 ∈ 𝑆)
14	5, 6, 2	cantnfs 9113	. . . . . . . . . . 11 ⊢ (𝜑 → (𝐹 ∈ 𝑆 ↔ (𝐹:𝐴⟶ω ∧ 𝐹 finSupp ∅)))
15	13, 14	mpbid 235	. . . . . . . . . 10 ⊢ (𝜑 → (𝐹:𝐴⟶ω ∧ 𝐹 finSupp ∅))
16	15	simpld 498	. . . . . . . . 9 ⊢ (𝜑 → 𝐹:𝐴⟶ω)
17	3, 16	fssdm 6504	. . . . . . . 8 ⊢ (𝜑 → (𝐹 supp ∅) ⊆ 𝐴)
18		cnfcom.w	. . . . . . . . 9 ⊢ 𝑊 = (𝐺‘∪ dom 𝐺)
19		ovex 7168	. . . . . . . . . . . . . . 15 ⊢ (𝐹 supp ∅) ∈ V
20		cnfcom.g	. . . . . . . . . . . . . . . 16 ⊢ 𝐺 = OrdIso( E , (𝐹 supp ∅))
21	20	oion 8984	. . . . . . . . . . . . . . 15 ⊢ ((𝐹 supp ∅) ∈ V → dom 𝐺 ∈ On)
22	19, 21	ax-mp 5	. . . . . . . . . . . . . 14 ⊢ dom 𝐺 ∈ On
23	22	elexi 3460	. . . . . . . . . . . . 13 ⊢ dom 𝐺 ∈ V
24	23	uniex 7447	. . . . . . . . . . . 12 ⊢ ∪ dom 𝐺 ∈ V
25	24	sucid 6238	. . . . . . . . . . 11 ⊢ ∪ dom 𝐺 ∈ suc ∪ dom 𝐺
26		cnfcom.h	. . . . . . . . . . . 12 ⊢ 𝐻 = seqω((𝑘 ∈ V, 𝑧 ∈ V ↦ (𝑀 +o 𝑧)), ∅)
27		cnfcom.t	. . . . . . . . . . . 12 ⊢ 𝑇 = seqω((𝑘 ∈ V, 𝑓 ∈ V ↦ 𝐾), ∅)
28		cnfcom.m	. . . . . . . . . . . 12 ⊢ 𝑀 = ((ω ↑o (𝐺‘𝑘)) ·o (𝐹‘(𝐺‘𝑘)))
29		cnfcom.k	. . . . . . . . . . . 12 ⊢ 𝐾 = ((𝑥 ∈ 𝑀 ↦ (dom 𝑓 +o 𝑥)) ∪ ◡(𝑥 ∈ dom 𝑓 ↦ (𝑀 +o 𝑥)))
30		cnfcom3.1	. . . . . . . . . . . . 13 ⊢ (𝜑 → ω ⊆ 𝐵)
31		peano1 7581	. . . . . . . . . . . . . 14 ⊢ ∅ ∈ ω
32	31	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝜑 → ∅ ∈ ω)
33	30, 32	sseldd 3916	. . . . . . . . . . . 12 ⊢ (𝜑 → ∅ ∈ 𝐵)
34	5, 2, 11, 4, 20, 26, 27, 28, 29, 18, 33	cnfcom2lem 9148	. . . . . . . . . . 11 ⊢ (𝜑 → dom 𝐺 = suc ∪ dom 𝐺)
35	25, 34	eleqtrrid 2897	. . . . . . . . . 10 ⊢ (𝜑 → ∪ dom 𝐺 ∈ dom 𝐺)
36	20	oif 8978	. . . . . . . . . . 11 ⊢ 𝐺:dom 𝐺⟶(𝐹 supp ∅)
37	36	ffvelrni 6827	. . . . . . . . . 10 ⊢ (∪ dom 𝐺 ∈ dom 𝐺 → (𝐺‘∪ dom 𝐺) ∈ (𝐹 supp ∅))
38	35, 37	syl 17	. . . . . . . . 9 ⊢ (𝜑 → (𝐺‘∪ dom 𝐺) ∈ (𝐹 supp ∅))
39	18, 38	eqeltrid 2894	. . . . . . . 8 ⊢ (𝜑 → 𝑊 ∈ (𝐹 supp ∅))
40	17, 39	sseldd 3916	. . . . . . 7 ⊢ (𝜑 → 𝑊 ∈ 𝐴)
41		onelon 6184	. . . . . . 7 ⊢ ((𝐴 ∈ On ∧ 𝑊 ∈ 𝐴) → 𝑊 ∈ On)
42	2, 40, 41	syl2anc 587	. . . . . 6 ⊢ (𝜑 → 𝑊 ∈ On)
43		oecl 8145	. . . . . 6 ⊢ ((ω ∈ On ∧ 𝑊 ∈ On) → (ω ↑o 𝑊) ∈ On)
44	1, 42, 43	sylancr 590	. . . . 5 ⊢ (𝜑 → (ω ↑o 𝑊) ∈ On)
45	16, 40	ffvelrnd 6829	. . . . . 6 ⊢ (𝜑 → (𝐹‘𝑊) ∈ ω)
46		nnon 7566	. . . . . 6 ⊢ ((𝐹‘𝑊) ∈ ω → (𝐹‘𝑊) ∈ On)
47	45, 46	syl 17	. . . . 5 ⊢ (𝜑 → (𝐹‘𝑊) ∈ On)
48		cnfcom.y	. . . . . 6 ⊢ 𝑌 = (𝑢 ∈ (𝐹‘𝑊), 𝑣 ∈ (ω ↑o 𝑊) ↦ (((ω ↑o 𝑊) ·o 𝑢) +o 𝑣))
49		cnfcom.x	. . . . . 6 ⊢ 𝑋 = (𝑢 ∈ (𝐹‘𝑊), 𝑣 ∈ (ω ↑o 𝑊) ↦ (((𝐹‘𝑊) ·o 𝑣) +o 𝑢))
50	48, 49	omf1o 8603	. . . . 5 ⊢ (((ω ↑o 𝑊) ∈ On ∧ (𝐹‘𝑊) ∈ On) → (𝑋 ∘ ◡𝑌):((ω ↑o 𝑊) ·o (𝐹‘𝑊))–1-1-onto→((𝐹‘𝑊) ·o (ω ↑o 𝑊)))
51	44, 47, 50	syl2anc 587	. . . 4 ⊢ (𝜑 → (𝑋 ∘ ◡𝑌):((ω ↑o 𝑊) ·o (𝐹‘𝑊))–1-1-onto→((𝐹‘𝑊) ·o (ω ↑o 𝑊)))
52	16	ffnd 6488	. . . . . . . . . 10 ⊢ (𝜑 → 𝐹 Fn 𝐴)
53		0ex 5175	. . . . . . . . . . 11 ⊢ ∅ ∈ V
54	53	a1i 11	. . . . . . . . . 10 ⊢ (𝜑 → ∅ ∈ V)
55		elsuppfn 7821	. . . . . . . . . 10 ⊢ ((𝐹 Fn 𝐴 ∧ 𝐴 ∈ On ∧ ∅ ∈ V) → (𝑊 ∈ (𝐹 supp ∅) ↔ (𝑊 ∈ 𝐴 ∧ (𝐹‘𝑊) ≠ ∅)))
56	52, 2, 54, 55	syl3anc 1368	. . . . . . . . 9 ⊢ (𝜑 → (𝑊 ∈ (𝐹 supp ∅) ↔ (𝑊 ∈ 𝐴 ∧ (𝐹‘𝑊) ≠ ∅)))
57		simpr 488	. . . . . . . . 9 ⊢ ((𝑊 ∈ 𝐴 ∧ (𝐹‘𝑊) ≠ ∅) → (𝐹‘𝑊) ≠ ∅)
58	56, 57	syl6bi 256	. . . . . . . 8 ⊢ (𝜑 → (𝑊 ∈ (𝐹 supp ∅) → (𝐹‘𝑊) ≠ ∅))
59	39, 58	mpd 15	. . . . . . 7 ⊢ (𝜑 → (𝐹‘𝑊) ≠ ∅)
60		on0eln0 6214	. . . . . . . 8 ⊢ ((𝐹‘𝑊) ∈ On → (∅ ∈ (𝐹‘𝑊) ↔ (𝐹‘𝑊) ≠ ∅))
61	45, 46, 60	3syl 18	. . . . . . 7 ⊢ (𝜑 → (∅ ∈ (𝐹‘𝑊) ↔ (𝐹‘𝑊) ≠ ∅))
62	59, 61	mpbird 260	. . . . . 6 ⊢ (𝜑 → ∅ ∈ (𝐹‘𝑊))
63	5, 2, 11, 4, 20, 26, 27, 28, 29, 18, 30	cnfcom3lem 9150	. . . . . . 7 ⊢ (𝜑 → 𝑊 ∈ (On ∖ 1o))
64		ondif1 8109	. . . . . . . 8 ⊢ (𝑊 ∈ (On ∖ 1o) ↔ (𝑊 ∈ On ∧ ∅ ∈ 𝑊))
65	64	simprbi 500	. . . . . . 7 ⊢ (𝑊 ∈ (On ∖ 1o) → ∅ ∈ 𝑊)
66	63, 65	syl 17	. . . . . 6 ⊢ (𝜑 → ∅ ∈ 𝑊)
67		omabs 8257	. . . . . 6 ⊢ ((((𝐹‘𝑊) ∈ ω ∧ ∅ ∈ (𝐹‘𝑊)) ∧ (𝑊 ∈ On ∧ ∅ ∈ 𝑊)) → ((𝐹‘𝑊) ·o (ω ↑o 𝑊)) = (ω ↑o 𝑊))
68	45, 62, 42, 66, 67	syl22anc 837	. . . . 5 ⊢ (𝜑 → ((𝐹‘𝑊) ·o (ω ↑o 𝑊)) = (ω ↑o 𝑊))
69	68	f1oeq3d 6587	. . . 4 ⊢ (𝜑 → ((𝑋 ∘ ◡𝑌):((ω ↑o 𝑊) ·o (𝐹‘𝑊))–1-1-onto→((𝐹‘𝑊) ·o (ω ↑o 𝑊)) ↔ (𝑋 ∘ ◡𝑌):((ω ↑o 𝑊) ·o (𝐹‘𝑊))–1-1-onto→(ω ↑o 𝑊)))
70	51, 69	mpbid 235	. . 3 ⊢ (𝜑 → (𝑋 ∘ ◡𝑌):((ω ↑o 𝑊) ·o (𝐹‘𝑊))–1-1-onto→(ω ↑o 𝑊))
71	5, 2, 11, 4, 20, 26, 27, 28, 29, 18, 33	cnfcom2 9149	. . 3 ⊢ (𝜑 → (𝑇‘dom 𝐺):𝐵–1-1-onto→((ω ↑o 𝑊) ·o (𝐹‘𝑊)))
72		f1oco 6612	. . 3 ⊢ (((𝑋 ∘ ◡𝑌):((ω ↑o 𝑊) ·o (𝐹‘𝑊))–1-1-onto→(ω ↑o 𝑊) ∧ (𝑇‘dom 𝐺):𝐵–1-1-onto→((ω ↑o 𝑊) ·o (𝐹‘𝑊))) → ((𝑋 ∘ ◡𝑌) ∘ (𝑇‘dom 𝐺)):𝐵–1-1-onto→(ω ↑o 𝑊))
73	70, 71, 72	syl2anc 587	. 2 ⊢ (𝜑 → ((𝑋 ∘ ◡𝑌) ∘ (𝑇‘dom 𝐺)):𝐵–1-1-onto→(ω ↑o 𝑊))
74		cnfcom.n	. . 3 ⊢ 𝑁 = ((𝑋 ∘ ◡𝑌) ∘ (𝑇‘dom 𝐺))
75		f1oeq1 6579	. . 3 ⊢ (𝑁 = ((𝑋 ∘ ◡𝑌) ∘ (𝑇‘dom 𝐺)) → (𝑁:𝐵–1-1-onto→(ω ↑o 𝑊) ↔ ((𝑋 ∘ ◡𝑌) ∘ (𝑇‘dom 𝐺)):𝐵–1-1-onto→(ω ↑o 𝑊)))
76	74, 75	ax-mp 5	. 2 ⊢ (𝑁:𝐵–1-1-onto→(ω ↑o 𝑊) ↔ ((𝑋 ∘ ◡𝑌) ∘ (𝑇‘dom 𝐺)):𝐵–1-1-onto→(ω ↑o 𝑊))
77	73, 76	sylibr 237	1 ⊢ (𝜑 → 𝑁:𝐵–1-1-onto→(ω ↑o 𝑊))

Syntax hints:   → wi 4   ↔ wb 209   ∧ wa 399   = wceq 1538   ∈ wcel 2111   ≠ wne 2987  Vcvv 3441   ∖ cdif 3878   ∪ cun 3879   ⊆ wss 3881  ∅c0 4243  ∪ cuni 4800   class class class wbr 5030   ↦ cmpt 5110   E cep 5429  ^◡ccnv 5518  dom cdm 5519   ∘ ccom 5523  Oncon0 6159  suc csuc 6161   Fn wfn 6319  ⟶wf 6320  –1-1-onto→wf1o 6323  ‘cfv 6324  (class class class)co 7135   ∈ cmpo 7137  ωcom 7560   supp csupp 7813  seq_ωcseqom 8066  1_oc1o 8078   +_o coa 8082   ·_o comu 8083   ↑_o coe 8084   finSupp cfsupp 8817  OrdIsocoi 8957   CNF ccnf 9108

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2770  ax-rep 5154  ax-sep 5167  ax-nul 5174  ax-pow 5231  ax-pr 5295  ax-un 7441  ax-inf2 9088

This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3or 1085  df-3an 1086  df-tru 1541  df-fal 1551  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2598  df-eu 2629  df-clab 2777  df-cleq 2791  df-clel 2870  df-nfc 2938  df-ne 2988  df-ral 3111  df-rex 3112  df-reu 3113  df-rmo 3114  df-rab 3115  df-v 3443  df-sbc 3721  df-csb 3829  df-dif 3884  df-un 3886  df-in 3888  df-ss 3898  df-pss 3900  df-nul 4244  df-if 4426  df-pw 4499  df-sn 4526  df-pr 4528  df-tp 4530  df-op 4532  df-uni 4801  df-int 4839  df-iun 4883  df-br 5031  df-opab 5093  df-mpt 5111  df-tr 5137  df-id 5425  df-eprel 5430  df-po 5438  df-so 5439  df-fr 5478  df-se 5479  df-we 5480  df-xp 5525  df-rel 5526  df-cnv 5527  df-co 5528  df-dm 5529  df-rn 5530  df-res 5531  df-ima 5532  df-pred 6116  df-ord 6162  df-on 6163  df-lim 6164  df-suc 6165  df-iota 6283  df-fun 6326  df-fn 6327  df-f 6328  df-f1 6329  df-fo 6330  df-f1o 6331  df-fv 6332  df-isom 6333  df-riota 7093  df-ov 7138  df-oprab 7139  df-mpo 7140  df-om 7561  df-1st 7671  df-2nd 7672  df-supp 7814  df-wrecs 7930  df-recs 7991  df-rdg 8029  df-seqom 8067  df-1o 8085  df-2o 8086  df-oadd 8089  df-omul 8090  df-oexp 8091  df-er 8272  df-map 8391  df-en 8493  df-dom 8494  df-sdom 8495  df-fin 8496  df-fsupp 8818  df-oi 8958  df-cnf 9109

This theorem is referenced by:  cnfcom3clem  9152