Theorem pwf1oexmid 15228

Description: An exercise related to 𝑁 copies of a singleton and the power set of a singleton (where the latter can also be thought of as representing truth values). Posed as an exercise by Martin Escardo online. (Contributed by Jim Kingdon, 3-Sep-2023.)

Hypothesis

Ref	Expression
pwle2.t	⊢ 𝑇 = ∪ 𝑥 ∈ 𝑁 ({𝑥} × 1o)

Assertion

Ref	Expression
pwf1oexmid	⊢ ((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) → (ran 𝐺 = 𝒫 1o ↔ (𝑁 = 2o ∧ EXMID)))

Distinct variable group:   𝑥,𝑁

Allowed substitution hints:   𝑇(𝑥)   𝐺(𝑥)

Proof of Theorem pwf1oexmid

Step	Hyp	Ref	Expression
1		pwle2.t	. . . . . 6 ⊢ 𝑇 = ∪ 𝑥 ∈ 𝑁 ({𝑥} × 1o)
2	1	pwle2 15227	. . . . 5 ⊢ ((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) → 𝑁 ⊆ 2o)
3	2	adantr 276	. . . 4 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ ran 𝐺 = 𝒫 1o) → 𝑁 ⊆ 2o)
4		pw1dom2 7257	. . . . . 6 ⊢ 2o ≼ 𝒫 1o
5		iunxpconst 4704	. . . . . . . . . . . 12 ⊢ ∪ 𝑥 ∈ 𝑁 ({𝑥} × 1o) = (𝑁 × 1o)
6		df1o2 6455	. . . . . . . . . . . . 13 ⊢ 1o = {∅}
7	6	xpeq2i 4665	. . . . . . . . . . . 12 ⊢ (𝑁 × 1o) = (𝑁 × {∅})
8	1, 5, 7	3eqtri 2214	. . . . . . . . . . 11 ⊢ 𝑇 = (𝑁 × {∅})
9		peano1 4611	. . . . . . . . . . . 12 ⊢ ∅ ∈ ω
10		xpsneng 6849	. . . . . . . . . . . 12 ⊢ ((𝑁 ∈ ω ∧ ∅ ∈ ω) → (𝑁 × {∅}) ≈ 𝑁)
11	9, 10	mpan2 425	. . . . . . . . . . 11 ⊢ (𝑁 ∈ ω → (𝑁 × {∅}) ≈ 𝑁)
12	8, 11	eqbrtrid 4053	. . . . . . . . . 10 ⊢ (𝑁 ∈ ω → 𝑇 ≈ 𝑁)
13	12	ad2antrr 488	. . . . . . . . 9 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ ran 𝐺 = 𝒫 1o) → 𝑇 ≈ 𝑁)
14	13	ensymd 6810	. . . . . . . 8 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ ran 𝐺 = 𝒫 1o) → 𝑁 ≈ 𝑇)
15		relen 6771	. . . . . . . . . 10 ⊢ Rel ≈
16		brrelex1 4683	. . . . . . . . . 10 ⊢ ((Rel ≈ ∧ 𝑇 ≈ 𝑁) → 𝑇 ∈ V)
17	15, 13, 16	sylancr 414	. . . . . . . . 9 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ ran 𝐺 = 𝒫 1o) → 𝑇 ∈ V)
18		simplr 528	. . . . . . . . . 10 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ ran 𝐺 = 𝒫 1o) → 𝐺:𝑇–1-1→𝒫 1o)
19		simpr 110	. . . . . . . . . 10 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ ran 𝐺 = 𝒫 1o) → ran 𝐺 = 𝒫 1o)
20		dff1o5 5489	. . . . . . . . . 10 ⊢ (𝐺:𝑇–1-1-onto→𝒫 1o ↔ (𝐺:𝑇–1-1→𝒫 1o ∧ ran 𝐺 = 𝒫 1o))
21	18, 19, 20	sylanbrc 417	. . . . . . . . 9 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ ran 𝐺 = 𝒫 1o) → 𝐺:𝑇–1-1-onto→𝒫 1o)
22		f1oeng 6784	. . . . . . . . 9 ⊢ ((𝑇 ∈ V ∧ 𝐺:𝑇–1-1-onto→𝒫 1o) → 𝑇 ≈ 𝒫 1o)
23	17, 21, 22	syl2anc 411	. . . . . . . 8 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ ran 𝐺 = 𝒫 1o) → 𝑇 ≈ 𝒫 1o)
24		entr 6811	. . . . . . . 8 ⊢ ((𝑁 ≈ 𝑇 ∧ 𝑇 ≈ 𝒫 1o) → 𝑁 ≈ 𝒫 1o)
25	14, 23, 24	syl2anc 411	. . . . . . 7 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ ran 𝐺 = 𝒫 1o) → 𝑁 ≈ 𝒫 1o)
26	25	ensymd 6810	. . . . . 6 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ ran 𝐺 = 𝒫 1o) → 𝒫 1o ≈ 𝑁)
27		domentr 6818	. . . . . 6 ⊢ ((2o ≼ 𝒫 1o ∧ 𝒫 1o ≈ 𝑁) → 2o ≼ 𝑁)
28	4, 26, 27	sylancr 414	. . . . 5 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ ran 𝐺 = 𝒫 1o) → 2o ≼ 𝑁)
29		2onn 6547	. . . . . . 7 ⊢ 2o ∈ ω
30		nndomo 6893	. . . . . . 7 ⊢ ((2o ∈ ω ∧ 𝑁 ∈ ω) → (2o ≼ 𝑁 ↔ 2o ⊆ 𝑁))
31	29, 30	mpan 424	. . . . . 6 ⊢ (𝑁 ∈ ω → (2o ≼ 𝑁 ↔ 2o ⊆ 𝑁))
32	31	ad2antrr 488	. . . . 5 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ ran 𝐺 = 𝒫 1o) → (2o ≼ 𝑁 ↔ 2o ⊆ 𝑁))
33	28, 32	mpbid 147	. . . 4 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ ran 𝐺 = 𝒫 1o) → 2o ⊆ 𝑁)
34	3, 33	eqssd 3187	. . 3 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ ran 𝐺 = 𝒫 1o) → 𝑁 = 2o)
35	26, 34	breqtrd 4044	. . . 4 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ ran 𝐺 = 𝒫 1o) → 𝒫 1o ≈ 2o)
36		exmidpw 6937	. . . 4 ⊢ (EXMID ↔ 𝒫 1o ≈ 2o)
37	35, 36	sylibr 134	. . 3 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ ran 𝐺 = 𝒫 1o) → EXMID)
38	34, 37	jca 306	. 2 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ ran 𝐺 = 𝒫 1o) → (𝑁 = 2o ∧ EXMID))
39		simplr 528	. . . . 5 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ (𝑁 = 2o ∧ EXMID)) → 𝐺:𝑇–1-1→𝒫 1o)
40	12	ad2antrr 488	. . . . . . . 8 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ (𝑁 = 2o ∧ EXMID)) → 𝑇 ≈ 𝑁)
41		simprl 529	. . . . . . . 8 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ (𝑁 = 2o ∧ EXMID)) → 𝑁 = 2o)
42	40, 41	breqtrd 4044	. . . . . . 7 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ (𝑁 = 2o ∧ EXMID)) → 𝑇 ≈ 2o)
43		simprr 531	. . . . . . . . 9 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ (𝑁 = 2o ∧ EXMID)) → EXMID)
44	43, 36	sylib 122	. . . . . . . 8 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ (𝑁 = 2o ∧ EXMID)) → 𝒫 1o ≈ 2o)
45	44	ensymd 6810	. . . . . . 7 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ (𝑁 = 2o ∧ EXMID)) → 2o ≈ 𝒫 1o)
46		entr 6811	. . . . . . 7 ⊢ ((𝑇 ≈ 2o ∧ 2o ≈ 𝒫 1o) → 𝑇 ≈ 𝒫 1o)
47	42, 45, 46	syl2anc 411	. . . . . 6 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ (𝑁 = 2o ∧ EXMID)) → 𝑇 ≈ 𝒫 1o)
48		nnfi 6901	. . . . . . . 8 ⊢ (2o ∈ ω → 2o ∈ Fin)
49	29, 48	mp1i 10	. . . . . . 7 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ (𝑁 = 2o ∧ EXMID)) → 2o ∈ Fin)
50		enfi 6902	. . . . . . . 8 ⊢ (𝒫 1o ≈ 2o → (𝒫 1o ∈ Fin ↔ 2o ∈ Fin))
51	44, 50	syl 14	. . . . . . 7 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ (𝑁 = 2o ∧ EXMID)) → (𝒫 1o ∈ Fin ↔ 2o ∈ Fin))
52	49, 51	mpbird 167	. . . . . 6 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ (𝑁 = 2o ∧ EXMID)) → 𝒫 1o ∈ Fin)
53		f1finf1o 6977	. . . . . 6 ⊢ ((𝑇 ≈ 𝒫 1o ∧ 𝒫 1o ∈ Fin) → (𝐺:𝑇–1-1→𝒫 1o ↔ 𝐺:𝑇–1-1-onto→𝒫 1o))
54	47, 52, 53	syl2anc 411	. . . . 5 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ (𝑁 = 2o ∧ EXMID)) → (𝐺:𝑇–1-1→𝒫 1o ↔ 𝐺:𝑇–1-1-onto→𝒫 1o))
55	39, 54	mpbid 147	. . . 4 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ (𝑁 = 2o ∧ EXMID)) → 𝐺:𝑇–1-1-onto→𝒫 1o)
56	55, 20	sylib 122	. . 3 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ (𝑁 = 2o ∧ EXMID)) → (𝐺:𝑇–1-1→𝒫 1o ∧ ran 𝐺 = 𝒫 1o))
57	56	simprd 114	. 2 ⊢ (((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) ∧ (𝑁 = 2o ∧ EXMID)) → ran 𝐺 = 𝒫 1o)
58	38, 57	impbida 596	1 ⊢ ((𝑁 ∈ ω ∧ 𝐺:𝑇–1-1→𝒫 1o) → (ran 𝐺 = 𝒫 1o ↔ (𝑁 = 2o ∧ EXMID)))

Syntax hints:   → wi 4   ∧ wa 104   ↔ wb 105   = wceq 1364   ∈ wcel 2160  Vcvv 2752   ⊆ wss 3144  ∅c0 3437  𝒫 cpw 3590  {csn 3607  ∪ ciun 3901   class class class wbr 4018  EXMIDwem 4212  ωcom 4607   × cxp 4642  ran crn 4645  Rel wrel 4649  –1-1→wf1 5232  –1-1-onto→wf1o 5234  1_oc1o 6435  2_oc2o 6436   ≈ cen 6765   ≼ cdom 6766  Fincfn 6767

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 615  ax-in2 616  ax-io 710  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-13 2162  ax-14 2163  ax-ext 2171  ax-coll 4133  ax-sep 4136  ax-nul 4144  ax-pow 4192  ax-pr 4227  ax-un 4451  ax-setind 4554  ax-iinf 4605

This theorem depends on definitions:  df-bi 117  df-dc 836  df-3or 981  df-3an 982  df-tru 1367  df-fal 1370  df-nf 1472  df-sb 1774  df-eu 2041  df-mo 2042  df-clab 2176  df-cleq 2182  df-clel 2185  df-nfc 2321  df-ne 2361  df-ral 2473  df-rex 2474  df-reu 2475  df-rab 2477  df-v 2754  df-sbc 2978  df-csb 3073  df-dif 3146  df-un 3148  df-in 3150  df-ss 3157  df-nul 3438  df-if 3550  df-pw 3592  df-sn 3613  df-pr 3614  df-op 3616  df-uni 3825  df-int 3860  df-iun 3903  df-br 4019  df-opab 4080  df-mpt 4081  df-tr 4117  df-exmid 4213  df-id 4311  df-iord 4384  df-on 4386  df-suc 4389  df-iom 4608  df-xp 4650  df-rel 4651  df-cnv 4652  df-co 4653  df-dm 4654  df-rn 4655  df-res 4656  df-ima 4657  df-iota 5196  df-fun 5237  df-fn 5238  df-f 5239  df-f1 5240  df-fo 5241  df-f1o 5242  df-fv 5243  df-1o 6442  df-2o 6443  df-er 6560  df-en 6768  df-dom 6769  df-fin 6770

This theorem is referenced by: (None)