limsup10exlem - Mathbox for Glauco Siliprandi

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Theorem limsup10exlem 45777

Description: The range of the given function. (Contributed by Glauco Siliprandi, 2-Jan-2022.)

**Hypotheses**
Ref	Expression
limsup10exlem.1	⊢ 𝐹 = (𝑛 ∈ ℕ ↦ if(2 ∥ 𝑛, 0, 1))
limsup10exlem.2	⊢ (𝜑 → 𝐾 ∈ ℝ)

**Assertion**
Ref	Expression
limsup10exlem	⊢ (𝜑 → (𝐹 “ (𝐾[,)+∞)) = {0, 1})

Distinct variable groups: 𝑛,𝐾 𝜑,𝑛 Allowed substitution hint: 𝐹(𝑛)

**Proof of Theorem limsup10exlem**
Step	Hyp	Ref	Expression
1		c0ex 11175	. . . . . . 7 ⊢ 0 ∈ V
2	1	prid1 4729	. . . . . 6 ⊢ 0 ∈ {0, 1}
3		1re 11181	. . . . . . . 8 ⊢ 1 ∈ ℝ
4	3	elexi 3473	. . . . . . 7 ⊢ 1 ∈ V
5	4	prid2 4730	. . . . . 6 ⊢ 1 ∈ {0, 1}
6	2, 5	ifcli 4539	. . . . 5 ⊢ if(2 ∥ 𝑛, 0, 1) ∈ {0, 1}
7	6	a1i 11	. . . 4 ⊢ ((𝜑 ∧ 𝑛 ∈ (ℕ ∩ (𝐾[,)+∞))) → if(2 ∥ 𝑛, 0, 1) ∈ {0, 1})
8	7	ralrimiva 3126	. . 3 ⊢ (𝜑 → ∀𝑛 ∈ (ℕ ∩ (𝐾[,)+∞))if(2 ∥ 𝑛, 0, 1) ∈ {0, 1})
9		nfv 1914	. . . 4 ⊢ Ⅎ𝑛𝜑
10	1, 4	ifex 4542	. . . . 5 ⊢ if(2 ∥ 𝑛, 0, 1) ∈ V
11	10	a1i 11	. . . 4 ⊢ ((𝜑 ∧ 𝑛 ∈ (ℕ ∩ (𝐾[,)+∞))) → if(2 ∥ 𝑛, 0, 1) ∈ V)
12		limsup10exlem.1	. . . 4 ⊢ 𝐹 = (𝑛 ∈ ℕ ↦ if(2 ∥ 𝑛, 0, 1))
13	9, 11, 12	imassmpt 45263	. . 3 ⊢ (𝜑 → ((𝐹 “ (𝐾[,)+∞)) ⊆ {0, 1} ↔ ∀𝑛 ∈ (ℕ ∩ (𝐾[,)+∞))if(2 ∥ 𝑛, 0, 1) ∈ {0, 1}))
14	8, 13	mpbird 257	. 2 ⊢ (𝜑 → (𝐹 “ (𝐾[,)+∞)) ⊆ {0, 1})
15		limsup10exlem.2	. . . . . . . . . 10 ⊢ (𝜑 → 𝐾 ∈ ℝ)
16	15	ceilcld 13812	. . . . . . . . 9 ⊢ (𝜑 → (⌈‘𝐾) ∈ ℤ)
17		1zzd 12571	. . . . . . . . 9 ⊢ (𝜑 → 1 ∈ ℤ)
18	16, 17	ifcld 4538	. . . . . . . 8 ⊢ (𝜑 → if(1 ≤ 𝐾, (⌈‘𝐾), 1) ∈ ℤ)
19	18	adantr 480	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑛 = (2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1))) → if(1 ≤ 𝐾, (⌈‘𝐾), 1) ∈ ℤ)
20		simpr 484	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑛 = (2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1))) → 𝑛 = (2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)))
21		2teven 16332	. . . . . . 7 ⊢ ((if(1 ≤ 𝐾, (⌈‘𝐾), 1) ∈ ℤ ∧ 𝑛 = (2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1))) → 2 ∥ 𝑛)
22	19, 20, 21	syl2anc 584	. . . . . 6 ⊢ ((𝜑 ∧ 𝑛 = (2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1))) → 2 ∥ 𝑛)
23	22	iftrued 4499	. . . . 5 ⊢ ((𝜑 ∧ 𝑛 = (2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1))) → if(2 ∥ 𝑛, 0, 1) = 0)
24		2nn 12266	. . . . . . 7 ⊢ 2 ∈ ℕ
25	24	a1i 11	. . . . . 6 ⊢ (𝜑 → 2 ∈ ℕ)
26		eqid 2730	. . . . . . . 8 ⊢ (ℤ_≥‘1) = (ℤ_≥‘1)
27	3	a1i 11	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 1 ≤ 𝐾) → 1 ∈ ℝ)
28	15	adantr 480	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 1 ≤ 𝐾) → 𝐾 ∈ ℝ)
29	16	zred 12645	. . . . . . . . . . . 12 ⊢ (𝜑 → (⌈‘𝐾) ∈ ℝ)
30	29	adantr 480	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 1 ≤ 𝐾) → (⌈‘𝐾) ∈ ℝ)
31		simpr 484	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 1 ≤ 𝐾) → 1 ≤ 𝐾)
32	15	ceilged 13815	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐾 ≤ (⌈‘𝐾))
33	32	adantr 480	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 1 ≤ 𝐾) → 𝐾 ≤ (⌈‘𝐾))
34	27, 28, 30, 31, 33	letrd 11338	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 1 ≤ 𝐾) → 1 ≤ (⌈‘𝐾))
35		iftrue 4497	. . . . . . . . . . 11 ⊢ (1 ≤ 𝐾 → if(1 ≤ 𝐾, (⌈‘𝐾), 1) = (⌈‘𝐾))
36	35	adantl 481	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 1 ≤ 𝐾) → if(1 ≤ 𝐾, (⌈‘𝐾), 1) = (⌈‘𝐾))
37	34, 36	breqtrrd 5138	. . . . . . . . 9 ⊢ ((𝜑 ∧ 1 ≤ 𝐾) → 1 ≤ if(1 ≤ 𝐾, (⌈‘𝐾), 1))
38	3	leidi 11719	. . . . . . . . . . 11 ⊢ 1 ≤ 1
39	38	a1i 11	. . . . . . . . . 10 ⊢ ((𝜑 ∧ ¬ 1 ≤ 𝐾) → 1 ≤ 1)
40		iffalse 4500	. . . . . . . . . . 11 ⊢ (¬ 1 ≤ 𝐾 → if(1 ≤ 𝐾, (⌈‘𝐾), 1) = 1)
41	40	adantl 481	. . . . . . . . . 10 ⊢ ((𝜑 ∧ ¬ 1 ≤ 𝐾) → if(1 ≤ 𝐾, (⌈‘𝐾), 1) = 1)
42	39, 41	breqtrrd 5138	. . . . . . . . 9 ⊢ ((𝜑 ∧ ¬ 1 ≤ 𝐾) → 1 ≤ if(1 ≤ 𝐾, (⌈‘𝐾), 1))
43	37, 42	pm2.61dan 812	. . . . . . . 8 ⊢ (𝜑 → 1 ≤ if(1 ≤ 𝐾, (⌈‘𝐾), 1))
44	26, 17, 18, 43	eluzd 45412	. . . . . . 7 ⊢ (𝜑 → if(1 ≤ 𝐾, (⌈‘𝐾), 1) ∈ (ℤ_≥‘1))
45		nnuz 12843	. . . . . . 7 ⊢ ℕ = (ℤ_≥‘1)
46	44, 45	eleqtrrdi 2840	. . . . . 6 ⊢ (𝜑 → if(1 ≤ 𝐾, (⌈‘𝐾), 1) ∈ ℕ)
47	25, 46	nnmulcld 12246	. . . . 5 ⊢ (𝜑 → (2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)) ∈ ℕ)
48	1	a1i 11	. . . . 5 ⊢ (𝜑 → 0 ∈ V)
49	12, 23, 47, 48	fvmptd2 6979	. . . 4 ⊢ (𝜑 → (𝐹‘(2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1))) = 0)
50	10, 12	fnmpti 6664	. . . . . 6 ⊢ 𝐹 Fn ℕ
51	50	a1i 11	. . . . 5 ⊢ (𝜑 → 𝐹 Fn ℕ)
52	15	rexrd 11231	. . . . . 6 ⊢ (𝜑 → 𝐾 ∈ ℝ^*)
53		pnfxr 11235	. . . . . . 7 ⊢ +∞ ∈ ℝ^*
54	53	a1i 11	. . . . . 6 ⊢ (𝜑 → +∞ ∈ ℝ^*)
55	47	nnxrd 45279	. . . . . 6 ⊢ (𝜑 → (2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)) ∈ ℝ^*)
56	47	nnred 12208	. . . . . . 7 ⊢ (𝜑 → (2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)) ∈ ℝ)
57	46	nnred 12208	. . . . . . . 8 ⊢ (𝜑 → if(1 ≤ 𝐾, (⌈‘𝐾), 1) ∈ ℝ)
58	33, 36	breqtrrd 5138	. . . . . . . . 9 ⊢ ((𝜑 ∧ 1 ≤ 𝐾) → 𝐾 ≤ if(1 ≤ 𝐾, (⌈‘𝐾), 1))
59	15	adantr 480	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ ¬ 1 ≤ 𝐾) → 𝐾 ∈ ℝ)
60	3	a1i 11	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ ¬ 1 ≤ 𝐾) → 1 ∈ ℝ)
61		simpr 484	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ ¬ 1 ≤ 𝐾) → ¬ 1 ≤ 𝐾)
62	59, 60, 61	nleltd 45455	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ ¬ 1 ≤ 𝐾) → 𝐾 < 1)
63	59, 60, 62	ltled 11329	. . . . . . . . . 10 ⊢ ((𝜑 ∧ ¬ 1 ≤ 𝐾) → 𝐾 ≤ 1)
64	41	eqcomd 2736	. . . . . . . . . 10 ⊢ ((𝜑 ∧ ¬ 1 ≤ 𝐾) → 1 = if(1 ≤ 𝐾, (⌈‘𝐾), 1))
65	63, 64	breqtrd 5136	. . . . . . . . 9 ⊢ ((𝜑 ∧ ¬ 1 ≤ 𝐾) → 𝐾 ≤ if(1 ≤ 𝐾, (⌈‘𝐾), 1))
66	58, 65	pm2.61dan 812	. . . . . . . 8 ⊢ (𝜑 → 𝐾 ≤ if(1 ≤ 𝐾, (⌈‘𝐾), 1))
67	46	nnrpd 13000	. . . . . . . . 9 ⊢ (𝜑 → if(1 ≤ 𝐾, (⌈‘𝐾), 1) ∈ ℝ⁺)
68		2timesgt 45293	. . . . . . . . 9 ⊢ (if(1 ≤ 𝐾, (⌈‘𝐾), 1) ∈ ℝ⁺ → if(1 ≤ 𝐾, (⌈‘𝐾), 1) < (2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)))
69	67, 68	syl 17	. . . . . . . 8 ⊢ (𝜑 → if(1 ≤ 𝐾, (⌈‘𝐾), 1) < (2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)))
70	15, 57, 56, 66, 69	lelttrd 11339	. . . . . . 7 ⊢ (𝜑 → 𝐾 < (2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)))
71	15, 56, 70	ltled 11329	. . . . . 6 ⊢ (𝜑 → 𝐾 ≤ (2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)))
72	56	ltpnfd 13088	. . . . . 6 ⊢ (𝜑 → (2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)) < +∞)
73	52, 54, 55, 71, 72	elicod 13363	. . . . 5 ⊢ (𝜑 → (2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)) ∈ (𝐾[,)+∞))
74	51, 47, 73	fnfvimad 7211	. . . 4 ⊢ (𝜑 → (𝐹‘(2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1))) ∈ (𝐹 “ (𝐾[,)+∞)))
75	49, 74	eqeltrrd 2830	. . 3 ⊢ (𝜑 → 0 ∈ (𝐹 “ (𝐾[,)+∞)))
76	18	adantr 480	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑛 = ((2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)) + 1)) → if(1 ≤ 𝐾, (⌈‘𝐾), 1) ∈ ℤ)
77		simpr 484	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑛 = ((2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)) + 1)) → 𝑛 = ((2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)) + 1))
78		2tp1odd 16329	. . . . . . 7 ⊢ ((if(1 ≤ 𝐾, (⌈‘𝐾), 1) ∈ ℤ ∧ 𝑛 = ((2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)) + 1)) → ¬ 2 ∥ 𝑛)
79	76, 77, 78	syl2anc 584	. . . . . 6 ⊢ ((𝜑 ∧ 𝑛 = ((2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)) + 1)) → ¬ 2 ∥ 𝑛)
80	79	iffalsed 4502	. . . . 5 ⊢ ((𝜑 ∧ 𝑛 = ((2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)) + 1)) → if(2 ∥ 𝑛, 0, 1) = 1)
81	47	peano2nnd 12210	. . . . 5 ⊢ (𝜑 → ((2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)) + 1) ∈ ℕ)
82		1xr 11240	. . . . . 6 ⊢ 1 ∈ ℝ^*
83	82	a1i 11	. . . . 5 ⊢ (𝜑 → 1 ∈ ℝ^*)
84	12, 80, 81, 83	fvmptd2 6979	. . . 4 ⊢ (𝜑 → (𝐹‘((2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)) + 1)) = 1)
85	81	nnxrd 45279	. . . . . 6 ⊢ (𝜑 → ((2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)) + 1) ∈ ℝ^*)
86	81	nnred 12208	. . . . . . 7 ⊢ (𝜑 → ((2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)) + 1) ∈ ℝ)
87	56	ltp1d 12120	. . . . . . . 8 ⊢ (𝜑 → (2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)) < ((2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)) + 1))
88	15, 56, 86, 70, 87	lttrd 11342	. . . . . . 7 ⊢ (𝜑 → 𝐾 < ((2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)) + 1))
89	15, 86, 88	ltled 11329	. . . . . 6 ⊢ (𝜑 → 𝐾 ≤ ((2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)) + 1))
90	86	ltpnfd 13088	. . . . . 6 ⊢ (𝜑 → ((2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)) + 1) < +∞)
91	52, 54, 85, 89, 90	elicod 13363	. . . . 5 ⊢ (𝜑 → ((2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)) + 1) ∈ (𝐾[,)+∞))
92	51, 81, 91	fnfvimad 7211	. . . 4 ⊢ (𝜑 → (𝐹‘((2 · if(1 ≤ 𝐾, (⌈‘𝐾), 1)) + 1)) ∈ (𝐹 “ (𝐾[,)+∞)))
93	84, 92	eqeltrrd 2830	. . 3 ⊢ (𝜑 → 1 ∈ (𝐹 “ (𝐾[,)+∞)))
94	75, 93	prssd 4789	. 2 ⊢ (𝜑 → {0, 1} ⊆ (𝐹 “ (𝐾[,)+∞)))
95	14, 94	eqssd 3967	1 ⊢ (𝜑 → (𝐹 “ (𝐾[,)+∞)) = {0, 1})

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2109 ∀wral 3045 Vcvv 3450 ∩ cin 3916 ⊆ wss 3917 ifcif 4491 {cpr 4594 class class class wbr 5110 ↦ cmpt 5191 “ cima 5644 Fn wfn 6509 ‘cfv 6514 (class class class)co 7390 ℝcr 11074 0cc0 11075 1c1 11076 + caddc 11078 · cmul 11080 +∞cpnf 11212 ℝ^*cxr 11214 < clt 11215 ≤ cle 11216 ℕcn 12193 2c2 12248 ℤcz 12536 ℤ_≥cuz 12800 ℝ⁺crp 12958 [,)cico 13315 ⌈cceil 13760 ∥ cdvds 16229

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 2702 ax-sep 5254 ax-nul 5264 ax-pow 5323 ax-pr 5390 ax-un 7714 ax-cnex 11131 ax-resscn 11132 ax-1cn 11133 ax-icn 11134 ax-addcl 11135 ax-addrcl 11136 ax-mulcl 11137 ax-mulrcl 11138 ax-mulcom 11139 ax-addass 11140 ax-mulass 11141 ax-distr 11142 ax-i2m1 11143 ax-1ne0 11144 ax-1rid 11145 ax-rnegex 11146 ax-rrecex 11147 ax-cnre 11148 ax-pre-lttri 11149 ax-pre-lttrn 11150 ax-pre-ltadd 11151 ax-pre-mulgt0 11152 ax-pre-sup 11153

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 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-nfc 2879 df-ne 2927 df-nel 3031 df-ral 3046 df-rex 3055 df-rmo 3356 df-reu 3357 df-rab 3409 df-v 3452 df-sbc 3757 df-csb 3866 df-dif 3920 df-un 3922 df-in 3924 df-ss 3934 df-pss 3937 df-nul 4300 df-if 4492 df-pw 4568 df-sn 4593 df-pr 4595 df-op 4599 df-uni 4875 df-iun 4960 df-br 5111 df-opab 5173 df-mpt 5192 df-tr 5218 df-id 5536 df-eprel 5541 df-po 5549 df-so 5550 df-fr 5594 df-we 5596 df-xp 5647 df-rel 5648 df-cnv 5649 df-co 5650 df-dm 5651 df-rn 5652 df-res 5653 df-ima 5654 df-pred 6277 df-ord 6338 df-on 6339 df-lim 6340 df-suc 6341 df-iota 6467 df-fun 6516 df-fn 6517 df-f 6518 df-f1 6519 df-fo 6520 df-f1o 6521 df-fv 6522 df-riota 7347 df-ov 7393 df-oprab 7394 df-mpo 7395 df-om 7846 df-2nd 7972 df-frecs 8263 df-wrecs 8294 df-recs 8343 df-rdg 8381 df-er 8674 df-en 8922 df-dom 8923 df-sdom 8924 df-sup 9400 df-inf 9401 df-pnf 11217 df-mnf 11218 df-xr 11219 df-ltxr 11220 df-le 11221 df-sub 11414 df-neg 11415 df-div 11843 df-nn 12194 df-2 12256 df-n0 12450 df-z 12537 df-uz 12801 df-rp 12959 df-ico 13319 df-fl 13761 df-ceil 13762 df-dvds 16230

This theorem is referenced by: limsup10ex 45778 liminf10ex 45779

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