Theorem oemapwe 8535

Description: The lexicographic order on a function space of ordinals gives a well-ordering with order type equal to the ordinal exponential. This provides an alternate definition of the ordinal exponential. (Contributed by Mario Carneiro, 28-May-2015.)

Hypotheses

Ref	Expression
cantnfs.s	⊢ 𝑆 = dom (𝐴 CNF 𝐵)
cantnfs.a	⊢ (𝜑 → 𝐴 ∈ On)
cantnfs.b	⊢ (𝜑 → 𝐵 ∈ On)
oemapval.t	⊢ 𝑇 = {⟨𝑥, 𝑦⟩ ∣ ∃𝑧 ∈ 𝐵 ((𝑥‘𝑧) ∈ (𝑦‘𝑧) ∧ ∀𝑤 ∈ 𝐵 (𝑧 ∈ 𝑤 → (𝑥‘𝑤) = (𝑦‘𝑤)))}

Assertion

Ref	Expression
oemapwe	⊢ (𝜑 → (𝑇 We 𝑆 ∧ dom OrdIso(𝑇, 𝑆) = (𝐴 ↑𝑜 𝐵)))

Distinct variable groups:   𝑥,𝑤,𝑦,𝑧,𝐵   𝑤,𝐴,𝑥,𝑦,𝑧   𝑥,𝑆,𝑦,𝑧   𝜑,𝑥,𝑦,𝑧

Allowed substitution hints:   𝜑(𝑤)   𝑆(𝑤)   𝑇(𝑥,𝑦,𝑧,𝑤)

Proof of Theorem oemapwe

Step	Hyp	Ref	Expression
1		cantnfs.a	. . . . 5 ⊢ (𝜑 → 𝐴 ∈ On)
2		cantnfs.b	. . . . 5 ⊢ (𝜑 → 𝐵 ∈ On)
3		oecl 7562	. . . . 5 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 ↑𝑜 𝐵) ∈ On)
4	1, 2, 3	syl2anc 692	. . . 4 ⊢ (𝜑 → (𝐴 ↑𝑜 𝐵) ∈ On)
5		eloni 5692	. . . 4 ⊢ ((𝐴 ↑𝑜 𝐵) ∈ On → Ord (𝐴 ↑𝑜 𝐵))
6		ordwe 5695	. . . 4 ⊢ (Ord (𝐴 ↑𝑜 𝐵) → E We (𝐴 ↑𝑜 𝐵))
7	4, 5, 6	3syl 18	. . 3 ⊢ (𝜑 → E We (𝐴 ↑𝑜 𝐵))
8		cantnfs.s	. . . . 5 ⊢ 𝑆 = dom (𝐴 CNF 𝐵)
9		oemapval.t	. . . . 5 ⊢ 𝑇 = {⟨𝑥, 𝑦⟩ ∣ ∃𝑧 ∈ 𝐵 ((𝑥‘𝑧) ∈ (𝑦‘𝑧) ∧ ∀𝑤 ∈ 𝐵 (𝑧 ∈ 𝑤 → (𝑥‘𝑤) = (𝑦‘𝑤)))}
10	8, 1, 2, 9	cantnf 8534	. . . 4 ⊢ (𝜑 → (𝐴 CNF 𝐵) Isom 𝑇, E (𝑆, (𝐴 ↑𝑜 𝐵)))
11		isowe 6553	. . . 4 ⊢ ((𝐴 CNF 𝐵) Isom 𝑇, E (𝑆, (𝐴 ↑𝑜 𝐵)) → (𝑇 We 𝑆 ↔ E We (𝐴 ↑𝑜 𝐵)))
12	10, 11	syl 17	. . 3 ⊢ (𝜑 → (𝑇 We 𝑆 ↔ E We (𝐴 ↑𝑜 𝐵)))
13	7, 12	mpbird 247	. 2 ⊢ (𝜑 → 𝑇 We 𝑆)
14	4, 5	syl 17	. . . . 5 ⊢ (𝜑 → Ord (𝐴 ↑𝑜 𝐵))
15		isocnv 6534	. . . . . 6 ⊢ ((𝐴 CNF 𝐵) Isom 𝑇, E (𝑆, (𝐴 ↑𝑜 𝐵)) → ◡(𝐴 CNF 𝐵) Isom E , 𝑇 ((𝐴 ↑𝑜 𝐵), 𝑆))
16	10, 15	syl 17	. . . . 5 ⊢ (𝜑 → ◡(𝐴 CNF 𝐵) Isom E , 𝑇 ((𝐴 ↑𝑜 𝐵), 𝑆))
17		ovex 6632	. . . . . . . . 9 ⊢ (𝐴 CNF 𝐵) ∈ V
18	17	dmex 7046	. . . . . . . 8 ⊢ dom (𝐴 CNF 𝐵) ∈ V
19	8, 18	eqeltri 2694	. . . . . . 7 ⊢ 𝑆 ∈ V
20		exse 5038	. . . . . . 7 ⊢ (𝑆 ∈ V → 𝑇 Se 𝑆)
21	19, 20	ax-mp 5	. . . . . 6 ⊢ 𝑇 Se 𝑆
22		eqid 2621	. . . . . . 7 ⊢ OrdIso(𝑇, 𝑆) = OrdIso(𝑇, 𝑆)
23	22	oieu 8388	. . . . . 6 ⊢ ((𝑇 We 𝑆 ∧ 𝑇 Se 𝑆) → ((Ord (𝐴 ↑𝑜 𝐵) ∧ ◡(𝐴 CNF 𝐵) Isom E , 𝑇 ((𝐴 ↑𝑜 𝐵), 𝑆)) ↔ ((𝐴 ↑𝑜 𝐵) = dom OrdIso(𝑇, 𝑆) ∧ ◡(𝐴 CNF 𝐵) = OrdIso(𝑇, 𝑆))))
24	13, 21, 23	sylancl 693	. . . . 5 ⊢ (𝜑 → ((Ord (𝐴 ↑𝑜 𝐵) ∧ ◡(𝐴 CNF 𝐵) Isom E , 𝑇 ((𝐴 ↑𝑜 𝐵), 𝑆)) ↔ ((𝐴 ↑𝑜 𝐵) = dom OrdIso(𝑇, 𝑆) ∧ ◡(𝐴 CNF 𝐵) = OrdIso(𝑇, 𝑆))))
25	14, 16, 24	mpbi2and 955	. . . 4 ⊢ (𝜑 → ((𝐴 ↑𝑜 𝐵) = dom OrdIso(𝑇, 𝑆) ∧ ◡(𝐴 CNF 𝐵) = OrdIso(𝑇, 𝑆)))
26	25	simpld 475	. . 3 ⊢ (𝜑 → (𝐴 ↑𝑜 𝐵) = dom OrdIso(𝑇, 𝑆))
27	26	eqcomd 2627	. 2 ⊢ (𝜑 → dom OrdIso(𝑇, 𝑆) = (𝐴 ↑𝑜 𝐵))
28	13, 27	jca 554	1 ⊢ (𝜑 → (𝑇 We 𝑆 ∧ dom OrdIso(𝑇, 𝑆) = (𝐴 ↑𝑜 𝐵)))

Syntax hints:   → wi 4   ↔ wb 196   ∧ wa 384   = wceq 1480   ∈ wcel 1987  ∀wral 2907  ∃wrex 2908  Vcvv 3186  {copab 4672   E cep 4983   Se wse 5031   We wwe 5032  ^◡ccnv 5073  dom cdm 5074  Ord word 5681  Oncon0 5682  ‘cfv 5847   Isom wiso 5848  (class class class)co 6604   ↑_𝑜 coe 7504  OrdIsocoi 8358   CNF ccnf 8502

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1719  ax-4 1734  ax-5 1836  ax-6 1885  ax-7 1932  ax-8 1989  ax-9 1996  ax-10 2016  ax-11 2031  ax-12 2044  ax-13 2245  ax-ext 2601  ax-rep 4731  ax-sep 4741  ax-nul 4749  ax-pow 4803  ax-pr 4867  ax-un 6902

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1037  df-3an 1038  df-tru 1483  df-fal 1486  df-ex 1702  df-nf 1707  df-sb 1878  df-eu 2473  df-mo 2474  df-clab 2608  df-cleq 2614  df-clel 2617  df-nfc 2750  df-ne 2791  df-ral 2912  df-rex 2913  df-reu 2914  df-rmo 2915  df-rab 2916  df-v 3188  df-sbc 3418  df-csb 3515  df-dif 3558  df-un 3560  df-in 3562  df-ss 3569  df-pss 3571  df-nul 3892  df-if 4059  df-pw 4132  df-sn 4149  df-pr 4151  df-tp 4153  df-op 4155  df-uni 4403  df-int 4441  df-iun 4487  df-br 4614  df-opab 4674  df-mpt 4675  df-tr 4713  df-eprel 4985  df-id 4989  df-po 4995  df-so 4996  df-fr 5033  df-se 5034  df-we 5035  df-xp 5080  df-rel 5081  df-cnv 5082  df-co 5083  df-dm 5084  df-rn 5085  df-res 5086  df-ima 5087  df-pred 5639  df-ord 5685  df-on 5686  df-lim 5687  df-suc 5688  df-iota 5810  df-fun 5849  df-fn 5850  df-f 5851  df-f1 5852  df-fo 5853  df-f1o 5854  df-fv 5855  df-isom 5856  df-riota 6565  df-ov 6607  df-oprab 6608  df-mpt2 6609  df-om 7013  df-1st 7113  df-2nd 7114  df-supp 7241  df-wrecs 7352  df-recs 7413  df-rdg 7451  df-seqom 7488  df-1o 7505  df-2o 7506  df-oadd 7509  df-omul 7510  df-oexp 7511  df-er 7687  df-map 7804  df-en 7900  df-dom 7901  df-sdom 7902  df-fin 7903  df-fsupp 8220  df-oi 8359  df-cnf 8503

This theorem is referenced by:  cantnffval2  8536  wemapwe  8538