Theorem ackbij1b 10167

Description: The Ackermann bijection, part 1b: the bijection from ackbij1 10166 restricts naturally to the powers of particular naturals. (Contributed by Stefan O'Rear, 18-Nov-2014.)

Hypothesis

Ref	Expression
ackbij.f	⊢ 𝐹 = (𝑥 ∈ (𝒫 ω ∩ Fin) ↦ (card‘∪ 𝑦 ∈ 𝑥 ({𝑦} × 𝒫 𝑦)))

Assertion

Ref	Expression
ackbij1b	⊢ (𝐴 ∈ ω → (𝐹 “ 𝒫 𝐴) = (card‘𝒫 𝐴))

Distinct variable groups:   𝑥,𝐹,𝑦   𝑥,𝐴,𝑦

Proof of Theorem ackbij1b

Dummy variable 𝑎 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		ackbij.f	. . . . . 6 ⊢ 𝐹 = (𝑥 ∈ (𝒫 ω ∩ Fin) ↦ (card‘∪ 𝑦 ∈ 𝑥 ({𝑦} × 𝒫 𝑦)))
2	1	ackbij1lem17 10164	. . . . 5 ⊢ 𝐹:(𝒫 ω ∩ Fin)–1-1→ω
3		ackbij2lem1 10147	. . . . 5 ⊢ (𝐴 ∈ ω → 𝒫 𝐴 ⊆ (𝒫 ω ∩ Fin))
4		pwexg 5328	. . . . 5 ⊢ (𝐴 ∈ ω → 𝒫 𝐴 ∈ V)
5		f1imaeng 8962	. . . . 5 ⊢ ((𝐹:(𝒫 ω ∩ Fin)–1-1→ω ∧ 𝒫 𝐴 ⊆ (𝒫 ω ∩ Fin) ∧ 𝒫 𝐴 ∈ V) → (𝐹 “ 𝒫 𝐴) ≈ 𝒫 𝐴)
6	2, 3, 4, 5	mp3an2i 1468	. . . 4 ⊢ (𝐴 ∈ ω → (𝐹 “ 𝒫 𝐴) ≈ 𝒫 𝐴)
7		nnfi 9108	. . . . . 6 ⊢ (𝐴 ∈ ω → 𝐴 ∈ Fin)
8		pwfi 9244	. . . . . 6 ⊢ (𝐴 ∈ Fin ↔ 𝒫 𝐴 ∈ Fin)
9	7, 8	sylib 218	. . . . 5 ⊢ (𝐴 ∈ ω → 𝒫 𝐴 ∈ Fin)
10		ficardid 9891	. . . . 5 ⊢ (𝒫 𝐴 ∈ Fin → (card‘𝒫 𝐴) ≈ 𝒫 𝐴)
11		ensym 8951	. . . . 5 ⊢ ((card‘𝒫 𝐴) ≈ 𝒫 𝐴 → 𝒫 𝐴 ≈ (card‘𝒫 𝐴))
12	9, 10, 11	3syl 18	. . . 4 ⊢ (𝐴 ∈ ω → 𝒫 𝐴 ≈ (card‘𝒫 𝐴))
13		entr 8954	. . . 4 ⊢ (((𝐹 “ 𝒫 𝐴) ≈ 𝒫 𝐴 ∧ 𝒫 𝐴 ≈ (card‘𝒫 𝐴)) → (𝐹 “ 𝒫 𝐴) ≈ (card‘𝒫 𝐴))
14	6, 12, 13	syl2anc 584	. . 3 ⊢ (𝐴 ∈ ω → (𝐹 “ 𝒫 𝐴) ≈ (card‘𝒫 𝐴))
15		onfin2 9157	. . . . . . 7 ⊢ ω = (On ∩ Fin)
16		inss2 4197	. . . . . . 7 ⊢ (On ∩ Fin) ⊆ Fin
17	15, 16	eqsstri 3990	. . . . . 6 ⊢ ω ⊆ Fin
18		ficardom 9890	. . . . . . 7 ⊢ (𝒫 𝐴 ∈ Fin → (card‘𝒫 𝐴) ∈ ω)
19	9, 18	syl 17	. . . . . 6 ⊢ (𝐴 ∈ ω → (card‘𝒫 𝐴) ∈ ω)
20	17, 19	sselid 3941	. . . . 5 ⊢ (𝐴 ∈ ω → (card‘𝒫 𝐴) ∈ Fin)
21		php3 9150	. . . . . 6 ⊢ (((card‘𝒫 𝐴) ∈ Fin ∧ (𝐹 “ 𝒫 𝐴) ⊊ (card‘𝒫 𝐴)) → (𝐹 “ 𝒫 𝐴) ≺ (card‘𝒫 𝐴))
22	21	ex 412	. . . . 5 ⊢ ((card‘𝒫 𝐴) ∈ Fin → ((𝐹 “ 𝒫 𝐴) ⊊ (card‘𝒫 𝐴) → (𝐹 “ 𝒫 𝐴) ≺ (card‘𝒫 𝐴)))
23	20, 22	syl 17	. . . 4 ⊢ (𝐴 ∈ ω → ((𝐹 “ 𝒫 𝐴) ⊊ (card‘𝒫 𝐴) → (𝐹 “ 𝒫 𝐴) ≺ (card‘𝒫 𝐴)))
24		sdomnen 8929	. . . 4 ⊢ ((𝐹 “ 𝒫 𝐴) ≺ (card‘𝒫 𝐴) → ¬ (𝐹 “ 𝒫 𝐴) ≈ (card‘𝒫 𝐴))
25	23, 24	syl6 35	. . 3 ⊢ (𝐴 ∈ ω → ((𝐹 “ 𝒫 𝐴) ⊊ (card‘𝒫 𝐴) → ¬ (𝐹 “ 𝒫 𝐴) ≈ (card‘𝒫 𝐴)))
26	14, 25	mt2d 136	. 2 ⊢ (𝐴 ∈ ω → ¬ (𝐹 “ 𝒫 𝐴) ⊊ (card‘𝒫 𝐴))
27		fvex 6853	. . . . . 6 ⊢ (𝐹‘𝑎) ∈ V
28		ackbij1lem3 10150	. . . . . . . . 9 ⊢ (𝐴 ∈ ω → 𝐴 ∈ (𝒫 ω ∩ Fin))
29		elpwi 4566	. . . . . . . . 9 ⊢ (𝑎 ∈ 𝒫 𝐴 → 𝑎 ⊆ 𝐴)
30	1	ackbij1lem12 10159	. . . . . . . . 9 ⊢ ((𝐴 ∈ (𝒫 ω ∩ Fin) ∧ 𝑎 ⊆ 𝐴) → (𝐹‘𝑎) ⊆ (𝐹‘𝐴))
31	28, 29, 30	syl2an 596	. . . . . . . 8 ⊢ ((𝐴 ∈ ω ∧ 𝑎 ∈ 𝒫 𝐴) → (𝐹‘𝑎) ⊆ (𝐹‘𝐴))
32	1	ackbij1lem10 10157	. . . . . . . . . . 11 ⊢ 𝐹:(𝒫 ω ∩ Fin)⟶ω
33		peano1 7845	. . . . . . . . . . 11 ⊢ ∅ ∈ ω
34	32, 33	f0cli 7052	. . . . . . . . . 10 ⊢ (𝐹‘𝑎) ∈ ω
35		nnord 7830	. . . . . . . . . 10 ⊢ ((𝐹‘𝑎) ∈ ω → Ord (𝐹‘𝑎))
36	34, 35	ax-mp 5	. . . . . . . . 9 ⊢ Ord (𝐹‘𝑎)
37	32, 33	f0cli 7052	. . . . . . . . . 10 ⊢ (𝐹‘𝐴) ∈ ω
38		nnord 7830	. . . . . . . . . 10 ⊢ ((𝐹‘𝐴) ∈ ω → Ord (𝐹‘𝐴))
39	37, 38	ax-mp 5	. . . . . . . . 9 ⊢ Ord (𝐹‘𝐴)
40		ordsucsssuc 7778	. . . . . . . . 9 ⊢ ((Ord (𝐹‘𝑎) ∧ Ord (𝐹‘𝐴)) → ((𝐹‘𝑎) ⊆ (𝐹‘𝐴) ↔ suc (𝐹‘𝑎) ⊆ suc (𝐹‘𝐴)))
41	36, 39, 40	mp2an 692	. . . . . . . 8 ⊢ ((𝐹‘𝑎) ⊆ (𝐹‘𝐴) ↔ suc (𝐹‘𝑎) ⊆ suc (𝐹‘𝐴))
42	31, 41	sylib 218	. . . . . . 7 ⊢ ((𝐴 ∈ ω ∧ 𝑎 ∈ 𝒫 𝐴) → suc (𝐹‘𝑎) ⊆ suc (𝐹‘𝐴))
43	1	ackbij1lem14 10161	. . . . . . . . 9 ⊢ (𝐴 ∈ ω → (𝐹‘{𝐴}) = suc (𝐹‘𝐴))
44	1	ackbij1lem8 10155	. . . . . . . . 9 ⊢ (𝐴 ∈ ω → (𝐹‘{𝐴}) = (card‘𝒫 𝐴))
45	43, 44	eqtr3d 2766	. . . . . . . 8 ⊢ (𝐴 ∈ ω → suc (𝐹‘𝐴) = (card‘𝒫 𝐴))
46	45	adantr 480	. . . . . . 7 ⊢ ((𝐴 ∈ ω ∧ 𝑎 ∈ 𝒫 𝐴) → suc (𝐹‘𝐴) = (card‘𝒫 𝐴))
47	42, 46	sseqtrd 3980	. . . . . 6 ⊢ ((𝐴 ∈ ω ∧ 𝑎 ∈ 𝒫 𝐴) → suc (𝐹‘𝑎) ⊆ (card‘𝒫 𝐴))
48		sucssel 6417	. . . . . 6 ⊢ ((𝐹‘𝑎) ∈ V → (suc (𝐹‘𝑎) ⊆ (card‘𝒫 𝐴) → (𝐹‘𝑎) ∈ (card‘𝒫 𝐴)))
49	27, 47, 48	mpsyl 68	. . . . 5 ⊢ ((𝐴 ∈ ω ∧ 𝑎 ∈ 𝒫 𝐴) → (𝐹‘𝑎) ∈ (card‘𝒫 𝐴))
50	49	ralrimiva 3125	. . . 4 ⊢ (𝐴 ∈ ω → ∀𝑎 ∈ 𝒫 𝐴(𝐹‘𝑎) ∈ (card‘𝒫 𝐴))
51		f1fun 6740	. . . . . 6 ⊢ (𝐹:(𝒫 ω ∩ Fin)–1-1→ω → Fun 𝐹)
52	2, 51	ax-mp 5	. . . . 5 ⊢ Fun 𝐹
53		f1dm 6742	. . . . . . 7 ⊢ (𝐹:(𝒫 ω ∩ Fin)–1-1→ω → dom 𝐹 = (𝒫 ω ∩ Fin))
54	2, 53	ax-mp 5	. . . . . 6 ⊢ dom 𝐹 = (𝒫 ω ∩ Fin)
55	3, 54	sseqtrrdi 3985	. . . . 5 ⊢ (𝐴 ∈ ω → 𝒫 𝐴 ⊆ dom 𝐹)
56		funimass4 6907	. . . . 5 ⊢ ((Fun 𝐹 ∧ 𝒫 𝐴 ⊆ dom 𝐹) → ((𝐹 “ 𝒫 𝐴) ⊆ (card‘𝒫 𝐴) ↔ ∀𝑎 ∈ 𝒫 𝐴(𝐹‘𝑎) ∈ (card‘𝒫 𝐴)))
57	52, 55, 56	sylancr 587	. . . 4 ⊢ (𝐴 ∈ ω → ((𝐹 “ 𝒫 𝐴) ⊆ (card‘𝒫 𝐴) ↔ ∀𝑎 ∈ 𝒫 𝐴(𝐹‘𝑎) ∈ (card‘𝒫 𝐴)))
58	50, 57	mpbird 257	. . 3 ⊢ (𝐴 ∈ ω → (𝐹 “ 𝒫 𝐴) ⊆ (card‘𝒫 𝐴))
59		sspss 4061	. . 3 ⊢ ((𝐹 “ 𝒫 𝐴) ⊆ (card‘𝒫 𝐴) ↔ ((𝐹 “ 𝒫 𝐴) ⊊ (card‘𝒫 𝐴) ∨ (𝐹 “ 𝒫 𝐴) = (card‘𝒫 𝐴)))
60	58, 59	sylib 218	. 2 ⊢ (𝐴 ∈ ω → ((𝐹 “ 𝒫 𝐴) ⊊ (card‘𝒫 𝐴) ∨ (𝐹 “ 𝒫 𝐴) = (card‘𝒫 𝐴)))
61		orel1 888	. 2 ⊢ (¬ (𝐹 “ 𝒫 𝐴) ⊊ (card‘𝒫 𝐴) → (((𝐹 “ 𝒫 𝐴) ⊊ (card‘𝒫 𝐴) ∨ (𝐹 “ 𝒫 𝐴) = (card‘𝒫 𝐴)) → (𝐹 “ 𝒫 𝐴) = (card‘𝒫 𝐴)))
62	26, 60, 61	sylc 65	1 ⊢ (𝐴 ∈ ω → (𝐹 “ 𝒫 𝐴) = (card‘𝒫 𝐴))

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 206   ∧ wa 395   ∨ wo 847   = wceq 1540   ∈ wcel 2109  ∀wral 3044  Vcvv 3444   ∩ cin 3910   ⊆ wss 3911   ⊊ wpss 3912  𝒫 cpw 4559  {csn 4585  ∪ ciun 4951   class class class wbr 5102   ↦ cmpt 5183   × cxp 5629  dom cdm 5631   “ cima 5634  Ord word 6319  Oncon0 6320  suc csuc 6322  Fun wfun 6493  –1-1→wf1 6496  ‘cfv 6499  ωcom 7822   ≈ cen 8892   ≺ csdm 8894  Fincfn 8895  cardccrd 9864

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-rep 5229  ax-sep 5246  ax-nul 5256  ax-pow 5315  ax-pr 5382  ax-un 7691

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ne 2926  df-ral 3045  df-rex 3054  df-reu 3352  df-rab 3403  df-v 3446  df-sbc 3751  df-csb 3860  df-dif 3914  df-un 3916  df-in 3918  df-ss 3928  df-pss 3931  df-nul 4293  df-if 4485  df-pw 4561  df-sn 4586  df-pr 4588  df-op 4592  df-uni 4868  df-int 4907  df-iun 4953  df-br 5103  df-opab 5165  df-mpt 5184  df-tr 5210  df-id 5526  df-eprel 5531  df-po 5539  df-so 5540  df-fr 5584  df-we 5586  df-xp 5637  df-rel 5638  df-cnv 5639  df-co 5640  df-dm 5641  df-rn 5642  df-res 5643  df-ima 5644  df-pred 6262  df-ord 6323  df-on 6324  df-lim 6325  df-suc 6326  df-iota 6452  df-fun 6501  df-fn 6502  df-f 6503  df-f1 6504  df-fo 6505  df-f1o 6506  df-fv 6507  df-ov 7372  df-oprab 7373  df-mpo 7374  df-om 7823  df-1st 7947  df-2nd 7948  df-frecs 8237  df-wrecs 8268  df-recs 8317  df-rdg 8355  df-1o 8411  df-2o 8412  df-oadd 8415  df-er 8648  df-map 8778  df-en 8896  df-dom 8897  df-sdom 8898  df-fin 8899  df-dju 9830  df-card 9868

This theorem is referenced by:  ackbij2lem2  10168