smfliminflem - Mathbox for Glauco Siliprandi

	Mathbox for Glauco Siliprandi		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > Mathboxes > smfliminflem		Structured version Visualization version GIF version

Theorem smfliminflem 43103

Description: The inferior limit of a countable set of sigma-measurable functions is sigma-measurable. Proposition 121F (e) of [Fremlin1] p. 39 . (Contributed by Glauco Siliprandi, 2-Jan-2022.)

**Hypotheses**
Ref	Expression
smfliminflem.m	⊢ (𝜑 → 𝑀 ∈ ℤ)
smfliminflem.z	⊢ 𝑍 = (ℤ_≥‘𝑀)
smfliminflem.s	⊢ (𝜑 → 𝑆 ∈ SAlg)
smfliminflem.f	⊢ (𝜑 → 𝐹:𝑍⟶(SMblFn‘𝑆))
smfliminflem.d	⊢ 𝐷 = {𝑥 ∈ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) ∣ (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) ∈ ℝ}
smfliminflem.g	⊢ 𝐺 = (𝑥 ∈ 𝐷 ↦ (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))))

**Assertion**
Ref	Expression
smfliminflem	⊢ (𝜑 → 𝐺 ∈ (SMblFn‘𝑆))

Distinct variable groups: 𝑥,𝐷 𝑛,𝐹,𝑥 𝑚,𝑀 𝑆,𝑚 𝑚,𝑍,𝑛,𝑥 𝜑,𝑚,𝑛,𝑥 Allowed substitution hints: 𝐷(𝑚,𝑛) 𝑆(𝑥,𝑛) 𝐹(𝑚) 𝐺(𝑥,𝑚,𝑛) 𝑀(𝑥,𝑛)

**Proof of Theorem smfliminflem**
Step	Hyp	Ref	Expression
1		smfliminflem.g	. . . 4 ⊢ 𝐺 = (𝑥 ∈ 𝐷 ↦ (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))))
2	1	a1i 11	. . 3 ⊢ (𝜑 → 𝐺 = (𝑥 ∈ 𝐷 ↦ (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥)))))
3		smfliminflem.d	. . . . . . . . . 10 ⊢ 𝐷 = {𝑥 ∈ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) ∣ (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) ∈ ℝ}
4		ssrab2 4055	. . . . . . . . . 10 ⊢ {𝑥 ∈ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) ∣ (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) ∈ ℝ} ⊆ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚)
5	3, 4	eqsstri 4000	. . . . . . . . 9 ⊢ 𝐷 ⊆ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚)
6		id 22	. . . . . . . . 9 ⊢ (𝑥 ∈ 𝐷 → 𝑥 ∈ 𝐷)
7	5, 6	sseldi 3964	. . . . . . . 8 ⊢ (𝑥 ∈ 𝐷 → 𝑥 ∈ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚))
8		smfliminflem.z	. . . . . . . . 9 ⊢ 𝑍 = (ℤ_≥‘𝑀)
9		eqid 2821	. . . . . . . . 9 ⊢ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) = ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚)
10	8, 9	allbutfi 41663	. . . . . . . 8 ⊢ (𝑥 ∈ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) ↔ ∃𝑛 ∈ 𝑍 ∀𝑚 ∈ (ℤ_≥‘𝑛)𝑥 ∈ dom (𝐹‘𝑚))
11	7, 10	sylib 220	. . . . . . 7 ⊢ (𝑥 ∈ 𝐷 → ∃𝑛 ∈ 𝑍 ∀𝑚 ∈ (ℤ_≥‘𝑛)𝑥 ∈ dom (𝐹‘𝑚))
12	11	adantl 484	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → ∃𝑛 ∈ 𝑍 ∀𝑚 ∈ (ℤ_≥‘𝑛)𝑥 ∈ dom (𝐹‘𝑚))
13		nfv 1911	. . . . . . . . . 10 ⊢ Ⅎ𝑚(𝜑 ∧ 𝑛 ∈ 𝑍)
14		nfra1 3219	. . . . . . . . . 10 ⊢ Ⅎ𝑚∀𝑚 ∈ (ℤ_≥‘𝑛)𝑥 ∈ dom (𝐹‘𝑚)
15	13, 14	nfan 1896	. . . . . . . . 9 ⊢ Ⅎ𝑚((𝜑 ∧ 𝑛 ∈ 𝑍) ∧ ∀𝑚 ∈ (ℤ_≥‘𝑛)𝑥 ∈ dom (𝐹‘𝑚))
16	8	fvexi 6683	. . . . . . . . . 10 ⊢ 𝑍 ∈ V
17	16	a1i 11	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑛 ∈ 𝑍) ∧ ∀𝑚 ∈ (ℤ_≥‘𝑛)𝑥 ∈ dom (𝐹‘𝑚)) → 𝑍 ∈ V)
18	8	eluzelz2 41674	. . . . . . . . . . 11 ⊢ (𝑛 ∈ 𝑍 → 𝑛 ∈ ℤ)
19	18	zred 12086	. . . . . . . . . 10 ⊢ (𝑛 ∈ 𝑍 → 𝑛 ∈ ℝ)
20	19	ad2antlr 725	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑛 ∈ 𝑍) ∧ ∀𝑚 ∈ (ℤ_≥‘𝑛)𝑥 ∈ dom (𝐹‘𝑚)) → 𝑛 ∈ ℝ)
21		simpll 765	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑛 ∈ 𝑍) ∧ ∀𝑚 ∈ (ℤ_≥‘𝑛)𝑥 ∈ dom (𝐹‘𝑚)) → 𝜑)
22		elinel1 4171	. . . . . . . . . . 11 ⊢ (𝑚 ∈ (𝑍 ∩ (𝑛[,)+∞)) → 𝑚 ∈ 𝑍)
23		smfliminflem.s	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝑆 ∈ SAlg)
24	23	adantr 483	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑍) → 𝑆 ∈ SAlg)
25		smfliminflem.f	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝐹:𝑍⟶(SMblFn‘𝑆))
26	25	ffvelrnda 6850	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑍) → (𝐹‘𝑚) ∈ (SMblFn‘𝑆))
27		eqid 2821	. . . . . . . . . . . 12 ⊢ dom (𝐹‘𝑚) = dom (𝐹‘𝑚)
28	24, 26, 27	smff 43008	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑍) → (𝐹‘𝑚):dom (𝐹‘𝑚)⟶ℝ)
29	21, 22, 28	syl2an 597	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑛 ∈ 𝑍) ∧ ∀𝑚 ∈ (ℤ_≥‘𝑛)𝑥 ∈ dom (𝐹‘𝑚)) ∧ 𝑚 ∈ (𝑍 ∩ (𝑛[,)+∞))) → (𝐹‘𝑚):dom (𝐹‘𝑚)⟶ℝ)
30		simplr 767	. . . . . . . . . . . 12 ⊢ (((𝑛 ∈ 𝑍 ∧ ∀𝑚 ∈ (ℤ_≥‘𝑛)𝑥 ∈ dom (𝐹‘𝑚)) ∧ 𝑚 ∈ (𝑍 ∩ (𝑛[,)+∞))) → ∀𝑚 ∈ (ℤ_≥‘𝑛)𝑥 ∈ dom (𝐹‘𝑚))
31		eqid 2821	. . . . . . . . . . . . . 14 ⊢ (ℤ_≥‘𝑛) = (ℤ_≥‘𝑛)
32	18	adantr 483	. . . . . . . . . . . . . 14 ⊢ ((𝑛 ∈ 𝑍 ∧ 𝑚 ∈ (𝑍 ∩ (𝑛[,)+∞))) → 𝑛 ∈ ℤ)
33	8, 22	eluzelz2d 41685	. . . . . . . . . . . . . . 15 ⊢ (𝑚 ∈ (𝑍 ∩ (𝑛[,)+∞)) → 𝑚 ∈ ℤ)
34	33	adantl 484	. . . . . . . . . . . . . 14 ⊢ ((𝑛 ∈ 𝑍 ∧ 𝑚 ∈ (𝑍 ∩ (𝑛[,)+∞))) → 𝑚 ∈ ℤ)
35	19	rexrd 10690	. . . . . . . . . . . . . . . 16 ⊢ (𝑛 ∈ 𝑍 → 𝑛 ∈ ℝ^*)
36	35	adantr 483	. . . . . . . . . . . . . . 15 ⊢ ((𝑛 ∈ 𝑍 ∧ 𝑚 ∈ (𝑍 ∩ (𝑛[,)+∞))) → 𝑛 ∈ ℝ^*)
37		pnfxr 10694	. . . . . . . . . . . . . . . 16 ⊢ +∞ ∈ ℝ^*
38	37	a1i 11	. . . . . . . . . . . . . . 15 ⊢ ((𝑛 ∈ 𝑍 ∧ 𝑚 ∈ (𝑍 ∩ (𝑛[,)+∞))) → +∞ ∈ ℝ^*)
39		elinel2 4172	. . . . . . . . . . . . . . . 16 ⊢ (𝑚 ∈ (𝑍 ∩ (𝑛[,)+∞)) → 𝑚 ∈ (𝑛[,)+∞))
40	39	adantl 484	. . . . . . . . . . . . . . 15 ⊢ ((𝑛 ∈ 𝑍 ∧ 𝑚 ∈ (𝑍 ∩ (𝑛[,)+∞))) → 𝑚 ∈ (𝑛[,)+∞))
41	36, 38, 40	icogelbd 41832	. . . . . . . . . . . . . 14 ⊢ ((𝑛 ∈ 𝑍 ∧ 𝑚 ∈ (𝑍 ∩ (𝑛[,)+∞))) → 𝑛 ≤ 𝑚)
42	31, 32, 34, 41	eluzd 41680	. . . . . . . . . . . . 13 ⊢ ((𝑛 ∈ 𝑍 ∧ 𝑚 ∈ (𝑍 ∩ (𝑛[,)+∞))) → 𝑚 ∈ (ℤ_≥‘𝑛))
43	42	adantlr 713	. . . . . . . . . . . 12 ⊢ (((𝑛 ∈ 𝑍 ∧ ∀𝑚 ∈ (ℤ_≥‘𝑛)𝑥 ∈ dom (𝐹‘𝑚)) ∧ 𝑚 ∈ (𝑍 ∩ (𝑛[,)+∞))) → 𝑚 ∈ (ℤ_≥‘𝑛))
44		rspa 3206	. . . . . . . . . . . 12 ⊢ ((∀𝑚 ∈ (ℤ_≥‘𝑛)𝑥 ∈ dom (𝐹‘𝑚) ∧ 𝑚 ∈ (ℤ_≥‘𝑛)) → 𝑥 ∈ dom (𝐹‘𝑚))
45	30, 43, 44	syl2anc 586	. . . . . . . . . . 11 ⊢ (((𝑛 ∈ 𝑍 ∧ ∀𝑚 ∈ (ℤ_≥‘𝑛)𝑥 ∈ dom (𝐹‘𝑚)) ∧ 𝑚 ∈ (𝑍 ∩ (𝑛[,)+∞))) → 𝑥 ∈ dom (𝐹‘𝑚))
46	45	adantlll 716	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑛 ∈ 𝑍) ∧ ∀𝑚 ∈ (ℤ_≥‘𝑛)𝑥 ∈ dom (𝐹‘𝑚)) ∧ 𝑚 ∈ (𝑍 ∩ (𝑛[,)+∞))) → 𝑥 ∈ dom (𝐹‘𝑚))
47	29, 46	ffvelrnd 6851	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑛 ∈ 𝑍) ∧ ∀𝑚 ∈ (ℤ_≥‘𝑛)𝑥 ∈ dom (𝐹‘𝑚)) ∧ 𝑚 ∈ (𝑍 ∩ (𝑛[,)+∞))) → ((𝐹‘𝑚)‘𝑥) ∈ ℝ)
48	15, 17, 20, 47	liminfval4 42068	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑛 ∈ 𝑍) ∧ ∀𝑚 ∈ (ℤ_≥‘𝑛)𝑥 ∈ dom (𝐹‘𝑚)) → (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) = -_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))))
49	48	rexlimdva2 3287	. . . . . . 7 ⊢ (𝜑 → (∃𝑛 ∈ 𝑍 ∀𝑚 ∈ (ℤ_≥‘𝑛)𝑥 ∈ dom (𝐹‘𝑚) → (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) = -_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥)))))
50	49	adantr 483	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → (∃𝑛 ∈ 𝑍 ∀𝑚 ∈ (ℤ_≥‘𝑛)𝑥 ∈ dom (𝐹‘𝑚) → (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) = -_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥)))))
51	12, 50	mpd 15	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) = -_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))))
52	51	xnegeqd 41709	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → -_𝑒(lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) = -_𝑒-_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))))
53	16	mptex 6985	. . . . . . . . . . . 12 ⊢ (𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥)) ∈ V
54	53	limsupcli 42036	. . . . . . . . . . 11 ⊢ (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∈ ℝ^*
55	54	xnegnegi 41711	. . . . . . . . . 10 ⊢ -_𝑒-_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) = (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥)))
56	55	a1i 11	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → -_𝑒-_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) = (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))))
57	52, 56	eqtr2d 2857	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) = -_𝑒(lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))))
58	3	rabeq2i 3487	. . . . . . . . . . 11 ⊢ (𝑥 ∈ 𝐷 ↔ (𝑥 ∈ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) ∧ (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) ∈ ℝ))
59	58	simprbi 499	. . . . . . . . . 10 ⊢ (𝑥 ∈ 𝐷 → (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) ∈ ℝ)
60	59	adantl 484	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) ∈ ℝ)
61	60	rexnegd 41410	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → -_𝑒(lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) = -(lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))))
62	57, 61	eqtr2d 2857	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → -(lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) = (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))))
63	60	renegcld 11066	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → -(lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) ∈ ℝ)
64	62, 63	eqeltrrd 2914	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∈ ℝ)
65	64	rexnegd 41410	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → -_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) = -(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))))
66	51, 65	eqtrd 2856	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) = -(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))))
67	66	mpteq2dva 5160	. . 3 ⊢ (𝜑 → (𝑥 ∈ 𝐷 ↦ (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥)))) = (𝑥 ∈ 𝐷 ↦ -(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥)))))
68	2, 67	eqtrd 2856	. 2 ⊢ (𝜑 → 𝐺 = (𝑥 ∈ 𝐷 ↦ -(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥)))))
69		nfv 1911	. . 3 ⊢ Ⅎ𝑥𝜑
70	18, 31	uzn0d 41697	. . . . . . . 8 ⊢ (𝑛 ∈ 𝑍 → (ℤ_≥‘𝑛) ≠ ∅)
71		fvex 6682	. . . . . . . . . . 11 ⊢ (𝐹‘𝑚) ∈ V
72	71	dmex 7615	. . . . . . . . . 10 ⊢ dom (𝐹‘𝑚) ∈ V
73	72	rgenw 3150	. . . . . . . . 9 ⊢ ∀𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) ∈ V
74	73	a1i 11	. . . . . . . 8 ⊢ (𝑛 ∈ 𝑍 → ∀𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) ∈ V)
75		iinexg 5243	. . . . . . . 8 ⊢ (((ℤ_≥‘𝑛) ≠ ∅ ∧ ∀𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) ∈ V) → ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) ∈ V)
76	70, 74, 75	syl2anc 586	. . . . . . 7 ⊢ (𝑛 ∈ 𝑍 → ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) ∈ V)
77	76	rgen 3148	. . . . . 6 ⊢ ∀𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) ∈ V
78		iunexg 7663	. . . . . 6 ⊢ ((𝑍 ∈ V ∧ ∀𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) ∈ V) → ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) ∈ V)
79	16, 77, 78	mp2an 690	. . . . 5 ⊢ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) ∈ V
80	79, 5	ssexi 5225	. . . 4 ⊢ 𝐷 ∈ V
81	80	a1i 11	. . 3 ⊢ (𝜑 → 𝐷 ∈ V)
82	3	a1i 11	. . . . . 6 ⊢ (𝜑 → 𝐷 = {𝑥 ∈ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) ∣ (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) ∈ ℝ})
83	10	biimpi 218	. . . . . . . . 9 ⊢ (𝑥 ∈ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) → ∃𝑛 ∈ 𝑍 ∀𝑚 ∈ (ℤ_≥‘𝑛)𝑥 ∈ dom (𝐹‘𝑚))
84	49	imp 409	. . . . . . . . 9 ⊢ ((𝜑 ∧ ∃𝑛 ∈ 𝑍 ∀𝑚 ∈ (ℤ_≥‘𝑛)𝑥 ∈ dom (𝐹‘𝑚)) → (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) = -_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))))
85	83, 84	sylan2 594	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚)) → (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) = -_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))))
86	54	a1i 11	. . . . . . . . . 10 ⊢ (((lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) = -_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∧ (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) ∈ ℝ) → (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∈ ℝ^*)
87		simpl 485	. . . . . . . . . . 11 ⊢ (((lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) = -_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∧ (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) ∈ ℝ) → (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) = -_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))))
88		simpr 487	. . . . . . . . . . 11 ⊢ (((lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) = -_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∧ (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) ∈ ℝ) → (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) ∈ ℝ)
89	87, 88	eqeltrrd 2914	. . . . . . . . . 10 ⊢ (((lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) = -_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∧ (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) ∈ ℝ) → -_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∈ ℝ)
90		xnegrecl2 41734	. . . . . . . . . 10 ⊢ (((lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∈ ℝ^* ∧ -_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∈ ℝ) → (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∈ ℝ)
91	86, 89, 90	syl2anc 586	. . . . . . . . 9 ⊢ (((lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) = -_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∧ (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) ∈ ℝ) → (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∈ ℝ)
92		simpl 485	. . . . . . . . . 10 ⊢ (((lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) = -_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∧ (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∈ ℝ) → (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) = -_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))))
93		xnegrecl 41710	. . . . . . . . . . 11 ⊢ ((lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∈ ℝ → -_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∈ ℝ)
94	93	adantl 484	. . . . . . . . . 10 ⊢ (((lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) = -_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∧ (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∈ ℝ) → -_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∈ ℝ)
95	92, 94	eqeltrd 2913	. . . . . . . . 9 ⊢ (((lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) = -_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∧ (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∈ ℝ) → (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) ∈ ℝ)
96	91, 95	impbida 799	. . . . . . . 8 ⊢ ((lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) = -_𝑒(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) → ((lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) ∈ ℝ ↔ (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∈ ℝ))
97	85, 96	syl 17	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚)) → ((lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) ∈ ℝ ↔ (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∈ ℝ))
98	97	rabbidva 3478	. . . . . 6 ⊢ (𝜑 → {𝑥 ∈ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) ∣ (lim inf‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) ∈ ℝ} = {𝑥 ∈ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) ∣ (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∈ ℝ})
99	82, 98	eqtrd 2856	. . . . 5 ⊢ (𝜑 → 𝐷 = {𝑥 ∈ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) ∣ (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∈ ℝ})
100	69, 99	mpteq1df 41504	. . . 4 ⊢ (𝜑 → (𝑥 ∈ 𝐷 ↦ (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥)))) = (𝑥 ∈ {𝑥 ∈ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) ∣ (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∈ ℝ} ↦ (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥)))))
101		nfv 1911	. . . . 5 ⊢ Ⅎ𝑚𝜑
102		nfv 1911	. . . . 5 ⊢ Ⅎ𝑛𝜑
103		smfliminflem.m	. . . . 5 ⊢ (𝜑 → 𝑀 ∈ ℤ)
104		negex 10883	. . . . . 6 ⊢ -((𝐹‘𝑚)‘𝑥) ∈ V
105	104	a1i 11	. . . . 5 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑍 ∧ 𝑥 ∈ dom (𝐹‘𝑚)) → -((𝐹‘𝑚)‘𝑥) ∈ V)
106		nfv 1911	. . . . . 6 ⊢ Ⅎ𝑥(𝜑 ∧ 𝑚 ∈ 𝑍)
107	72	a1i 11	. . . . . 6 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑍) → dom (𝐹‘𝑚) ∈ V)
108	28	ffvelrnda 6850	. . . . . 6 ⊢ (((𝜑 ∧ 𝑚 ∈ 𝑍) ∧ 𝑥 ∈ dom (𝐹‘𝑚)) → ((𝐹‘𝑚)‘𝑥) ∈ ℝ)
109	28	feqmptd 6732	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑍) → (𝐹‘𝑚) = (𝑥 ∈ dom (𝐹‘𝑚) ↦ ((𝐹‘𝑚)‘𝑥)))
110	109, 26	eqeltrrd 2914	. . . . . 6 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑍) → (𝑥 ∈ dom (𝐹‘𝑚) ↦ ((𝐹‘𝑚)‘𝑥)) ∈ (SMblFn‘𝑆))
111	106, 24, 107, 108, 110	smfneg 43077	. . . . 5 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑍) → (𝑥 ∈ dom (𝐹‘𝑚) ↦ -((𝐹‘𝑚)‘𝑥)) ∈ (SMblFn‘𝑆))
112		eqid 2821	. . . . 5 ⊢ {𝑥 ∈ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) ∣ (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∈ ℝ} = {𝑥 ∈ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) ∣ (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∈ ℝ}
113		eqid 2821	. . . . 5 ⊢ (𝑥 ∈ {𝑥 ∈ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) ∣ (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∈ ℝ} ↦ (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥)))) = (𝑥 ∈ {𝑥 ∈ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) ∣ (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∈ ℝ} ↦ (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))))
114	101, 69, 102, 103, 8, 23, 105, 111, 112, 113	smflimsupmpt 43102	. . . 4 ⊢ (𝜑 → (𝑥 ∈ {𝑥 ∈ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ_≥‘𝑛)dom (𝐹‘𝑚) ∣ (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥))) ∈ ℝ} ↦ (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥)))) ∈ (SMblFn‘𝑆))
115	100, 114	eqeltrd 2913	. . 3 ⊢ (𝜑 → (𝑥 ∈ 𝐷 ↦ (lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥)))) ∈ (SMblFn‘𝑆))
116	69, 23, 81, 64, 115	smfneg 43077	. 2 ⊢ (𝜑 → (𝑥 ∈ 𝐷 ↦ -(lim sup‘(𝑚 ∈ 𝑍 ↦ -((𝐹‘𝑚)‘𝑥)))) ∈ (SMblFn‘𝑆))
117	68, 116	eqeltrd 2913	1 ⊢ (𝜑 → 𝐺 ∈ (SMblFn‘𝑆))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 ∧ w3a 1083 = wceq 1533 ∈ wcel 2110 ≠ wne 3016 ∀wral 3138 ∃wrex 3139 {crab 3142 Vcvv 3494 ∩ cin 3934 ∅c0 4290 ∪ ciun 4918 ∩ ciin 4919 ↦ cmpt 5145 dom cdm 5554 ⟶wf 6350 ‘cfv 6354 (class class class)co 7155 ℝcr 10535 +∞cpnf 10671 ℝ^*cxr 10673 -cneg 10870 ℤcz 11980 ℤ_≥cuz 12242 -_𝑒cxne 12503 [,)cico 12739 lim supclsp 14826 lim infclsi 42030 SAlgcsalg 42592 SMblFncsmblfn 42976

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 ax-rep 5189 ax-sep 5202 ax-nul 5209 ax-pow 5265 ax-pr 5329 ax-un 7460 ax-inf2 9103 ax-cc 9856 ax-ac2 9884 ax-cnex 10592 ax-resscn 10593 ax-1cn 10594 ax-icn 10595 ax-addcl 10596 ax-addrcl 10597 ax-mulcl 10598 ax-mulrcl 10599 ax-mulcom 10600 ax-addass 10601 ax-mulass 10602 ax-distr 10603 ax-i2m1 10604 ax-1ne0 10605 ax-1rid 10606 ax-rnegex 10607 ax-rrecex 10608 ax-cnre 10609 ax-pre-lttri 10610 ax-pre-lttrn 10611 ax-pre-ltadd 10612 ax-pre-mulgt0 10613 ax-pre-sup 10614

This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-reu 3145 df-rmo 3146 df-rab 3147 df-v 3496 df-sbc 3772 df-csb 3883 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-pss 3953 df-nul 4291 df-if 4467 df-pw 4540 df-sn 4567 df-pr 4569 df-tp 4571 df-op 4573 df-uni 4838 df-int 4876 df-iun 4920 df-iin 4921 df-br 5066 df-opab 5128 df-mpt 5146 df-tr 5172 df-id 5459 df-eprel 5464 df-po 5473 df-so 5474 df-fr 5513 df-se 5514 df-we 5515 df-xp 5560 df-rel 5561 df-cnv 5562 df-co 5563 df-dm 5564 df-rn 5565 df-res 5566 df-ima 5567 df-pred 6147 df-ord 6193 df-on 6194 df-lim 6195 df-suc 6196 df-iota 6313 df-fun 6356 df-fn 6357 df-f 6358 df-f1 6359 df-fo 6360 df-f1o 6361 df-fv 6362 df-isom 6363 df-riota 7113 df-ov 7158 df-oprab 7159 df-mpo 7160 df-om 7580 df-1st 7688 df-2nd 7689 df-wrecs 7946 df-recs 8007 df-rdg 8045 df-1o 8101 df-oadd 8105 df-omul 8106 df-er 8288 df-map 8407 df-pm 8408 df-en 8509 df-dom 8510 df-sdom 8511 df-fin 8512 df-sup 8905 df-inf 8906 df-oi 8973 df-card 9367 df-acn 9370 df-ac 9541 df-pnf 10676 df-mnf 10677 df-xr 10678 df-ltxr 10679 df-le 10680 df-sub 10871 df-neg 10872 df-div 11297 df-nn 11638 df-2 11699 df-3 11700 df-4 11701 df-n0 11897 df-z 11981 df-uz 12243 df-q 12348 df-rp 12389 df-xneg 12506 df-ioo 12741 df-ioc 12742 df-ico 12743 df-icc 12744 df-fz 12892 df-fzo 13033 df-fl 13161 df-ceil 13162 df-seq 13369 df-exp 13429 df-hash 13690 df-word 13861 df-concat 13922 df-s1 13949 df-s2 14209 df-s3 14210 df-s4 14211 df-cj 14457 df-re 14458 df-im 14459 df-sqrt 14593 df-abs 14594 df-limsup 14827 df-clim 14844 df-rlim 14845 df-rest 16695 df-topgen 16716 df-top 21501 df-bases 21553 df-liminf 42031 df-salg 42593 df-salgen 42597 df-smblfn 42977

This theorem is referenced by: smfliminf 43104

W3C validator