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Theorem mbflimsup 23738

Description: The limit supremum of a sequence of measurable real-valued functions is measurable. (Contributed by Mario Carneiro, 7-Sep-2014.) (Revised by AV, 12-Sep-2020.)

**Hypotheses**
Ref	Expression
mbflimsup.1	⊢ 𝑍 = (ℤ_≥‘𝑀)
mbflimsup.2	⊢ 𝐺 = (𝑥 ∈ 𝐴 ↦ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)))
mbflimsup.h	⊢ 𝐻 = (𝑚 ∈ ℝ ↦ sup((((𝑛 ∈ 𝑍 ↦ 𝐵) “ (𝑚[,)+∞)) ∩ ℝ^), ℝ^, < ))
mbflimsup.3	⊢ (𝜑 → 𝑀 ∈ ℤ)
mbflimsup.4	⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ∈ ℝ)
mbflimsup.5	⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → (𝑥 ∈ 𝐴 ↦ 𝐵) ∈ MblFn)
mbflimsup.6	⊢ ((𝜑 ∧ (𝑛 ∈ 𝑍 ∧ 𝑥 ∈ 𝐴)) → 𝐵 ∈ ℝ)

**Assertion**
Ref	Expression
mbflimsup	⊢ (𝜑 → 𝐺 ∈ MblFn)

Distinct variable groups: 𝑥,𝑛,𝐴 𝐵,𝑚 𝜑,𝑛,𝑥 𝑚,𝑀 𝑚,𝑛,𝑥,𝑍 Allowed substitution hints: 𝜑(𝑚) 𝐴(𝑚) 𝐵(𝑥,𝑛) 𝐺(𝑥,𝑚,𝑛) 𝐻(𝑥,𝑚,𝑛) 𝑀(𝑥,𝑛)

Proof of Theorem mbflimsup Dummy variables 𝑖 𝑘 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		mbflimsup.2	. . 3 ⊢ 𝐺 = (𝑥 ∈ 𝐴 ↦ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)))
2		mbflimsup.h	. . . . . 6 ⊢ 𝐻 = (𝑚 ∈ ℝ ↦ sup((((𝑛 ∈ 𝑍 ↦ 𝐵) “ (𝑚[,)+∞)) ∩ ℝ^), ℝ^, < ))
3		mbflimsup.1	. . . . . . . . 9 ⊢ 𝑍 = (ℤ_≥‘𝑀)
4	3	fvexi 6393	. . . . . . . 8 ⊢ 𝑍 ∈ V
5	4	mptex 6683	. . . . . . 7 ⊢ (𝑛 ∈ 𝑍 ↦ 𝐵) ∈ V
6	5	a1i 11	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝑛 ∈ 𝑍 ↦ 𝐵) ∈ V)
7		uzssz 11911	. . . . . . . . 9 ⊢ (ℤ_≥‘𝑀) ⊆ ℤ
8	3, 7	eqsstri 3797	. . . . . . . 8 ⊢ 𝑍 ⊆ ℤ
9		zssre 11635	. . . . . . . 8 ⊢ ℤ ⊆ ℝ
10	8, 9	sstri 3772	. . . . . . 7 ⊢ 𝑍 ⊆ ℝ
11	10	a1i 11	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑍 ⊆ ℝ)
12		mbflimsup.3	. . . . . . . 8 ⊢ (𝜑 → 𝑀 ∈ ℤ)
13	3	uzsup 12875	. . . . . . . 8 ⊢ (𝑀 ∈ ℤ → sup(𝑍, ℝ^*, < ) = +∞)
14	12, 13	syl 17	. . . . . . 7 ⊢ (𝜑 → sup(𝑍, ℝ^*, < ) = +∞)
15	14	adantr 472	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → sup(𝑍, ℝ^*, < ) = +∞)
16	2, 6, 11, 15	limsupval2 14510	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) = inf((𝐻 “ 𝑍), ℝ^*, < ))
17		imassrn 5661	. . . . . . 7 ⊢ (𝐻 “ 𝑍) ⊆ ran 𝐻
18	12	adantr 472	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑀 ∈ ℤ)
19		mbflimsup.6	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑛 ∈ 𝑍 ∧ 𝑥 ∈ 𝐴)) → 𝐵 ∈ ℝ)
20	19	anass1rs 645	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑛 ∈ 𝑍) → 𝐵 ∈ ℝ)
21	20	fmpttd 6579	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝑛 ∈ 𝑍 ↦ 𝐵):𝑍⟶ℝ)
22		mbflimsup.4	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ∈ ℝ)
23	22	ltpnfd 12160	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) < +∞)
24	2, 3	limsupgre 14511	. . . . . . . . 9 ⊢ ((𝑀 ∈ ℤ ∧ (𝑛 ∈ 𝑍 ↦ 𝐵):𝑍⟶ℝ ∧ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) < +∞) → 𝐻:ℝ⟶ℝ)
25	18, 21, 23, 24	syl3anc 1490	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐻:ℝ⟶ℝ)
26	25	frnd 6232	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ran 𝐻 ⊆ ℝ)
27	17, 26	syl5ss 3774	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝐻 “ 𝑍) ⊆ ℝ)
28	25	fdmd 6234	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → dom 𝐻 = ℝ)
29	28	ineq1d 3977	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (dom 𝐻 ∩ 𝑍) = (ℝ ∩ 𝑍))
30		sseqin2 3981	. . . . . . . . . 10 ⊢ (𝑍 ⊆ ℝ ↔ (ℝ ∩ 𝑍) = 𝑍)
31	10, 30	mpbi 221	. . . . . . . . 9 ⊢ (ℝ ∩ 𝑍) = 𝑍
32	29, 31	syl6eq 2815	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (dom 𝐻 ∩ 𝑍) = 𝑍)
33		uzid 11906	. . . . . . . . . . . 12 ⊢ (𝑀 ∈ ℤ → 𝑀 ∈ (ℤ_≥‘𝑀))
34	12, 33	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑀 ∈ (ℤ_≥‘𝑀))
35	34, 3	syl6eleqr 2855	. . . . . . . . . 10 ⊢ (𝜑 → 𝑀 ∈ 𝑍)
36	35	adantr 472	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑀 ∈ 𝑍)
37	36	ne0d 4088	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑍 ≠ ∅)
38	32, 37	eqnetrd 3004	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (dom 𝐻 ∩ 𝑍) ≠ ∅)
39		imadisj 5668	. . . . . . . 8 ⊢ ((𝐻 “ 𝑍) = ∅ ↔ (dom 𝐻 ∩ 𝑍) = ∅)
40	39	necon3bii 2989	. . . . . . 7 ⊢ ((𝐻 “ 𝑍) ≠ ∅ ↔ (dom 𝐻 ∩ 𝑍) ≠ ∅)
41	38, 40	sylibr 225	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝐻 “ 𝑍) ≠ ∅)
42	22	leidd 10852	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)))
43	20	rexrd 10347	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑛 ∈ 𝑍) → 𝐵 ∈ ℝ^*)
44	43	fmpttd 6579	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝑛 ∈ 𝑍 ↦ 𝐵):𝑍⟶ℝ^*)
45	22	rexrd 10347	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ∈ ℝ^*)
46	2	limsuple 14508	. . . . . . . . . . 11 ⊢ ((𝑍 ⊆ ℝ ∧ (𝑛 ∈ 𝑍 ↦ 𝐵):𝑍⟶ℝ^* ∧ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ∈ ℝ^*) → ((lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ↔ ∀𝑦 ∈ ℝ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ (𝐻‘𝑦)))
47	11, 44, 45, 46	syl3anc 1490	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ((lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ↔ ∀𝑦 ∈ ℝ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ (𝐻‘𝑦)))
48	42, 47	mpbid 223	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ∀𝑦 ∈ ℝ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ (𝐻‘𝑦))
49		ssralv 3828	. . . . . . . . 9 ⊢ (𝑍 ⊆ ℝ → (∀𝑦 ∈ ℝ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ (𝐻‘𝑦) → ∀𝑦 ∈ 𝑍 (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ (𝐻‘𝑦)))
50	10, 48, 49	mpsyl 68	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ∀𝑦 ∈ 𝑍 (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ (𝐻‘𝑦))
51	2	limsupgf 14505	. . . . . . . . . 10 ⊢ 𝐻:ℝ⟶ℝ^*
52		ffn 6225	. . . . . . . . . 10 ⊢ (𝐻:ℝ⟶ℝ^* → 𝐻 Fn ℝ)
53	51, 52	ax-mp 5	. . . . . . . . 9 ⊢ 𝐻 Fn ℝ
54		breq2 4815	. . . . . . . . . 10 ⊢ (𝑧 = (𝐻‘𝑦) → ((lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ 𝑧 ↔ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ (𝐻‘𝑦)))
55	54	ralima 6695	. . . . . . . . 9 ⊢ ((𝐻 Fn ℝ ∧ 𝑍 ⊆ ℝ) → (∀𝑧 ∈ (𝐻 “ 𝑍)(lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ 𝑧 ↔ ∀𝑦 ∈ 𝑍 (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ (𝐻‘𝑦)))
56	53, 11, 55	sylancr 581	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (∀𝑧 ∈ (𝐻 “ 𝑍)(lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ 𝑧 ↔ ∀𝑦 ∈ 𝑍 (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ (𝐻‘𝑦)))
57	50, 56	mpbird 248	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ∀𝑧 ∈ (𝐻 “ 𝑍)(lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ 𝑧)
58		breq1 4814	. . . . . . . . 9 ⊢ (𝑦 = (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) → (𝑦 ≤ 𝑧 ↔ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ 𝑧))
59	58	ralbidv 3133	. . . . . . . 8 ⊢ (𝑦 = (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) → (∀𝑧 ∈ (𝐻 “ 𝑍)𝑦 ≤ 𝑧 ↔ ∀𝑧 ∈ (𝐻 “ 𝑍)(lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ 𝑧))
60	59	rspcev 3462	. . . . . . 7 ⊢ (((lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ∈ ℝ ∧ ∀𝑧 ∈ (𝐻 “ 𝑍)(lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ 𝑧) → ∃𝑦 ∈ ℝ ∀𝑧 ∈ (𝐻 “ 𝑍)𝑦 ≤ 𝑧)
61	22, 57, 60	syl2anc 579	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ∃𝑦 ∈ ℝ ∀𝑧 ∈ (𝐻 “ 𝑍)𝑦 ≤ 𝑧)
62		infxrre 12373	. . . . . 6 ⊢ (((𝐻 “ 𝑍) ⊆ ℝ ∧ (𝐻 “ 𝑍) ≠ ∅ ∧ ∃𝑦 ∈ ℝ ∀𝑧 ∈ (𝐻 “ 𝑍)𝑦 ≤ 𝑧) → inf((𝐻 “ 𝑍), ℝ^*, < ) = inf((𝐻 “ 𝑍), ℝ, < ))
63	27, 41, 61, 62	syl3anc 1490	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → inf((𝐻 “ 𝑍), ℝ^*, < ) = inf((𝐻 “ 𝑍), ℝ, < ))
64		df-ima 5292	. . . . . . 7 ⊢ (𝐻 “ 𝑍) = ran (𝐻 ↾ 𝑍)
65	25	feqmptd 6442	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐻 = (𝑖 ∈ ℝ ↦ (𝐻‘𝑖)))
66	65	reseq1d 5566	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝐻 ↾ 𝑍) = ((𝑖 ∈ ℝ ↦ (𝐻‘𝑖)) ↾ 𝑍))
67		resmpt 5628	. . . . . . . . . . 11 ⊢ (𝑍 ⊆ ℝ → ((𝑖 ∈ ℝ ↦ (𝐻‘𝑖)) ↾ 𝑍) = (𝑖 ∈ 𝑍 ↦ (𝐻‘𝑖)))
68	10, 67	ax-mp 5	. . . . . . . . . 10 ⊢ ((𝑖 ∈ ℝ ↦ (𝐻‘𝑖)) ↾ 𝑍) = (𝑖 ∈ 𝑍 ↦ (𝐻‘𝑖))
69	66, 68	syl6eq 2815	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝐻 ↾ 𝑍) = (𝑖 ∈ 𝑍 ↦ (𝐻‘𝑖)))
70	10	sseli 3759	. . . . . . . . . . . . 13 ⊢ (𝑖 ∈ 𝑍 → 𝑖 ∈ ℝ)
71		ffvelrn 6551	. . . . . . . . . . . . 13 ⊢ ((𝐻:ℝ⟶ℝ ∧ 𝑖 ∈ ℝ) → (𝐻‘𝑖) ∈ ℝ)
72	25, 70, 71	syl2an 589	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → (𝐻‘𝑖) ∈ ℝ)
73	72	rexrd 10347	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → (𝐻‘𝑖) ∈ ℝ^*)
74		simplll 791	. . . . . . . . . . . . . . . 16 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ_≥‘𝑖)) → 𝜑)
75	3	uztrn2 11909	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑖 ∈ 𝑍 ∧ 𝑛 ∈ (ℤ_≥‘𝑖)) → 𝑛 ∈ 𝑍)
76	75	adantll 705	. . . . . . . . . . . . . . . 16 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ_≥‘𝑖)) → 𝑛 ∈ 𝑍)
77		simpllr 793	. . . . . . . . . . . . . . . 16 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ_≥‘𝑖)) → 𝑥 ∈ 𝐴)
78	74, 76, 77, 19	syl12anc 865	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ_≥‘𝑖)) → 𝐵 ∈ ℝ)
79	78	fmpttd 6579	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵):(ℤ_≥‘𝑖)⟶ℝ)
80	79	frnd 6232	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵) ⊆ ℝ)
81		eqid 2765	. . . . . . . . . . . . . . . 16 ⊢ (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵) = (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)
82	81, 78	dmmptd 6204	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → dom (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵) = (ℤ_≥‘𝑖))
83		simpr 477	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑍) → 𝑖 ∈ 𝑍)
84	83, 3	syl6eleq 2854	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑍) → 𝑖 ∈ (ℤ_≥‘𝑀))
85		eluzelz 11901	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑖 ∈ (ℤ_≥‘𝑀) → 𝑖 ∈ ℤ)
86	84, 85	syl 17	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑍) → 𝑖 ∈ ℤ)
87	86	adantlr 706	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → 𝑖 ∈ ℤ)
88		uzid 11906	. . . . . . . . . . . . . . . 16 ⊢ (𝑖 ∈ ℤ → 𝑖 ∈ (ℤ_≥‘𝑖))
89		ne0i 4087	. . . . . . . . . . . . . . . 16 ⊢ (𝑖 ∈ (ℤ_≥‘𝑖) → (ℤ_≥‘𝑖) ≠ ∅)
90	87, 88, 89	3syl 18	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → (ℤ_≥‘𝑖) ≠ ∅)
91	82, 90	eqnetrd 3004	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → dom (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵) ≠ ∅)
92		dm0rn0 5512	. . . . . . . . . . . . . . 15 ⊢ (dom (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵) = ∅ ↔ ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵) = ∅)
93	92	necon3bii 2989	. . . . . . . . . . . . . 14 ⊢ (dom (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵) ≠ ∅ ↔ ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵) ≠ ∅)
94	91, 93	sylib 209	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵) ≠ ∅)
95	84	adantlr 706	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → 𝑖 ∈ (ℤ_≥‘𝑀))
96		uzss 11912	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑖 ∈ (ℤ_≥‘𝑀) → (ℤ_≥‘𝑖) ⊆ (ℤ_≥‘𝑀))
97	95, 96	syl 17	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → (ℤ_≥‘𝑖) ⊆ (ℤ_≥‘𝑀))
98	97, 3	syl6sseqr 3814	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → (ℤ_≥‘𝑖) ⊆ 𝑍)
99	72	leidd 10852	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → (𝐻‘𝑖) ≤ (𝐻‘𝑖))
100	10	a1i 11	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → 𝑍 ⊆ ℝ)
101	44	adantr 472	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → (𝑛 ∈ 𝑍 ↦ 𝐵):𝑍⟶ℝ^*)
102		simpr 477	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → 𝑖 ∈ 𝑍)
103	10, 102	sseldi 3761	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → 𝑖 ∈ ℝ)
104	2	limsupgle 14507	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝑍 ⊆ ℝ ∧ (𝑛 ∈ 𝑍 ↦ 𝐵):𝑍⟶ℝ^) ∧ 𝑖 ∈ ℝ ∧ (𝐻‘𝑖) ∈ ℝ^) → ((𝐻‘𝑖) ≤ (𝐻‘𝑖) ↔ ∀𝑘 ∈ 𝑍 (𝑖 ≤ 𝑘 → ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘) ≤ (𝐻‘𝑖))))
105	100, 101, 103, 73, 104	syl211anc 1495	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → ((𝐻‘𝑖) ≤ (𝐻‘𝑖) ↔ ∀𝑘 ∈ 𝑍 (𝑖 ≤ 𝑘 → ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘) ≤ (𝐻‘𝑖))))
106	99, 105	mpbid 223	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → ∀𝑘 ∈ 𝑍 (𝑖 ≤ 𝑘 → ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘) ≤ (𝐻‘𝑖)))
107		ssralv 3828	. . . . . . . . . . . . . . . . 17 ⊢ ((ℤ_≥‘𝑖) ⊆ 𝑍 → (∀𝑘 ∈ 𝑍 (𝑖 ≤ 𝑘 → ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘) ≤ (𝐻‘𝑖)) → ∀𝑘 ∈ (ℤ_≥‘𝑖)(𝑖 ≤ 𝑘 → ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘) ≤ (𝐻‘𝑖))))
108	98, 106, 107	sylc 65	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → ∀𝑘 ∈ (ℤ_≥‘𝑖)(𝑖 ≤ 𝑘 → ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘) ≤ (𝐻‘𝑖)))
109	98	adantr 472	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ 𝑘 ∈ (ℤ_≥‘𝑖)) → (ℤ_≥‘𝑖) ⊆ 𝑍)
110	109	resmptd 5631	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ 𝑘 ∈ (ℤ_≥‘𝑖)) → ((𝑛 ∈ 𝑍 ↦ 𝐵) ↾ (ℤ_≥‘𝑖)) = (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵))
111	110	fveq1d 6381	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ 𝑘 ∈ (ℤ_≥‘𝑖)) → (((𝑛 ∈ 𝑍 ↦ 𝐵) ↾ (ℤ_≥‘𝑖))‘𝑘) = ((𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)‘𝑘))
112		fvres 6398	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑘 ∈ (ℤ_≥‘𝑖) → (((𝑛 ∈ 𝑍 ↦ 𝐵) ↾ (ℤ_≥‘𝑖))‘𝑘) = ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘))
113	112	adantl 473	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ 𝑘 ∈ (ℤ_≥‘𝑖)) → (((𝑛 ∈ 𝑍 ↦ 𝐵) ↾ (ℤ_≥‘𝑖))‘𝑘) = ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘))
114	111, 113	eqtr3d 2801	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ 𝑘 ∈ (ℤ_≥‘𝑖)) → ((𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)‘𝑘) = ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘))
115	114	breq1d 4821	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ 𝑘 ∈ (ℤ_≥‘𝑖)) → (((𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)‘𝑘) ≤ (𝐻‘𝑖) ↔ ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘) ≤ (𝐻‘𝑖)))
116		eluzle 11904	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑘 ∈ (ℤ_≥‘𝑖) → 𝑖 ≤ 𝑘)
117	116	adantl 473	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ 𝑘 ∈ (ℤ_≥‘𝑖)) → 𝑖 ≤ 𝑘)
118		biimt 351	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑖 ≤ 𝑘 → (((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘) ≤ (𝐻‘𝑖) ↔ (𝑖 ≤ 𝑘 → ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘) ≤ (𝐻‘𝑖))))
119	117, 118	syl 17	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ 𝑘 ∈ (ℤ_≥‘𝑖)) → (((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘) ≤ (𝐻‘𝑖) ↔ (𝑖 ≤ 𝑘 → ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘) ≤ (𝐻‘𝑖))))
120	115, 119	bitrd 270	. . . . . . . . . . . . . . . . 17 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ 𝑘 ∈ (ℤ_≥‘𝑖)) → (((𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)‘𝑘) ≤ (𝐻‘𝑖) ↔ (𝑖 ≤ 𝑘 → ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘) ≤ (𝐻‘𝑖))))
121	120	ralbidva 3132	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → (∀𝑘 ∈ (ℤ_≥‘𝑖)((𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)‘𝑘) ≤ (𝐻‘𝑖) ↔ ∀𝑘 ∈ (ℤ_≥‘𝑖)(𝑖 ≤ 𝑘 → ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘) ≤ (𝐻‘𝑖))))
122	108, 121	mpbird 248	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → ∀𝑘 ∈ (ℤ_≥‘𝑖)((𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)‘𝑘) ≤ (𝐻‘𝑖))
123		ffn 6225	. . . . . . . . . . . . . . . 16 ⊢ ((𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵):(ℤ_≥‘𝑖)⟶ℝ → (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵) Fn (ℤ_≥‘𝑖))
124		breq1 4814	. . . . . . . . . . . . . . . . 17 ⊢ (𝑧 = ((𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)‘𝑘) → (𝑧 ≤ (𝐻‘𝑖) ↔ ((𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)‘𝑘) ≤ (𝐻‘𝑖)))
125	124	ralrn 6556	. . . . . . . . . . . . . . . 16 ⊢ ((𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵) Fn (ℤ_≥‘𝑖) → (∀𝑧 ∈ ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)𝑧 ≤ (𝐻‘𝑖) ↔ ∀𝑘 ∈ (ℤ_≥‘𝑖)((𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)‘𝑘) ≤ (𝐻‘𝑖)))
126	79, 123, 125	3syl 18	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → (∀𝑧 ∈ ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)𝑧 ≤ (𝐻‘𝑖) ↔ ∀𝑘 ∈ (ℤ_≥‘𝑖)((𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)‘𝑘) ≤ (𝐻‘𝑖)))
127	122, 126	mpbird 248	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → ∀𝑧 ∈ ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)𝑧 ≤ (𝐻‘𝑖))
128		brralrspcev 4871	. . . . . . . . . . . . . 14 ⊢ (((𝐻‘𝑖) ∈ ℝ ∧ ∀𝑧 ∈ ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)𝑧 ≤ (𝐻‘𝑖)) → ∃𝑦 ∈ ℝ ∀𝑧 ∈ ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)𝑧 ≤ 𝑦)
129	72, 127, 128	syl2anc 579	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → ∃𝑦 ∈ ℝ ∀𝑧 ∈ ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)𝑧 ≤ 𝑦)
130		suprcl 11241	. . . . . . . . . . . . 13 ⊢ ((ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵) ⊆ ℝ ∧ ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵) ≠ ∅ ∧ ∃𝑦 ∈ ℝ ∀𝑧 ∈ ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)𝑧 ≤ 𝑦) → sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < ) ∈ ℝ)
131	80, 94, 129, 130	syl3anc 1490	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < ) ∈ ℝ)
132	131	rexrd 10347	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < ) ∈ ℝ^*)
133	80	adantr 472	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ (𝑘 ∈ 𝑍 ∧ 𝑖 ≤ 𝑘)) → ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵) ⊆ ℝ)
134	94	adantr 472	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ (𝑘 ∈ 𝑍 ∧ 𝑖 ≤ 𝑘)) → ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵) ≠ ∅)
135	129	adantr 472	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ (𝑘 ∈ 𝑍 ∧ 𝑖 ≤ 𝑘)) → ∃𝑦 ∈ ℝ ∀𝑧 ∈ ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)𝑧 ≤ 𝑦)
136	8	sseli 3759	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑘 ∈ 𝑍 → 𝑘 ∈ ℤ)
137		eluz 11905	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑖 ∈ ℤ ∧ 𝑘 ∈ ℤ) → (𝑘 ∈ (ℤ_≥‘𝑖) ↔ 𝑖 ≤ 𝑘))
138	87, 136, 137	syl2an 589	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ 𝑘 ∈ 𝑍) → (𝑘 ∈ (ℤ_≥‘𝑖) ↔ 𝑖 ≤ 𝑘))
139	138	biimprd 239	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ 𝑘 ∈ 𝑍) → (𝑖 ≤ 𝑘 → 𝑘 ∈ (ℤ_≥‘𝑖)))
140	139	impr 446	. . . . . . . . . . . . . . . . 17 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ (𝑘 ∈ 𝑍 ∧ 𝑖 ≤ 𝑘)) → 𝑘 ∈ (ℤ_≥‘𝑖))
141	140, 114	syldan 585	. . . . . . . . . . . . . . . 16 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ (𝑘 ∈ 𝑍 ∧ 𝑖 ≤ 𝑘)) → ((𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)‘𝑘) = ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘))
142	79	adantr 472	. . . . . . . . . . . . . . . . . 18 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ (𝑘 ∈ 𝑍 ∧ 𝑖 ≤ 𝑘)) → (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵):(ℤ_≥‘𝑖)⟶ℝ)
143	142, 123	syl 17	. . . . . . . . . . . . . . . . 17 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ (𝑘 ∈ 𝑍 ∧ 𝑖 ≤ 𝑘)) → (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵) Fn (ℤ_≥‘𝑖))
144		fnfvelrn 6550	. . . . . . . . . . . . . . . . 17 ⊢ (((𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵) Fn (ℤ_≥‘𝑖) ∧ 𝑘 ∈ (ℤ_≥‘𝑖)) → ((𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)‘𝑘) ∈ ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵))
145	143, 140, 144	syl2anc 579	. . . . . . . . . . . . . . . 16 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ (𝑘 ∈ 𝑍 ∧ 𝑖 ≤ 𝑘)) → ((𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)‘𝑘) ∈ ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵))
146	141, 145	eqeltrrd 2845	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ (𝑘 ∈ 𝑍 ∧ 𝑖 ≤ 𝑘)) → ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘) ∈ ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵))
147		suprub 11242	. . . . . . . . . . . . . . 15 ⊢ (((ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵) ⊆ ℝ ∧ ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵) ≠ ∅ ∧ ∃𝑦 ∈ ℝ ∀𝑧 ∈ ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)𝑧 ≤ 𝑦) ∧ ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘) ∈ ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)) → ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘) ≤ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < ))
148	133, 134, 135, 146, 147	syl31anc 1492	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ (𝑘 ∈ 𝑍 ∧ 𝑖 ≤ 𝑘)) → ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘) ≤ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < ))
149	148	expr 448	. . . . . . . . . . . . 13 ⊢ ((((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) ∧ 𝑘 ∈ 𝑍) → (𝑖 ≤ 𝑘 → ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘) ≤ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < )))
150	149	ralrimiva 3113	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → ∀𝑘 ∈ 𝑍 (𝑖 ≤ 𝑘 → ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘) ≤ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < )))
151	2	limsupgle 14507	. . . . . . . . . . . . 13 ⊢ (((𝑍 ⊆ ℝ ∧ (𝑛 ∈ 𝑍 ↦ 𝐵):𝑍⟶ℝ^) ∧ 𝑖 ∈ ℝ ∧ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < ) ∈ ℝ^) → ((𝐻‘𝑖) ≤ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < ) ↔ ∀𝑘 ∈ 𝑍 (𝑖 ≤ 𝑘 → ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘) ≤ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < ))))
152	100, 101, 103, 132, 151	syl211anc 1495	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → ((𝐻‘𝑖) ≤ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < ) ↔ ∀𝑘 ∈ 𝑍 (𝑖 ≤ 𝑘 → ((𝑛 ∈ 𝑍 ↦ 𝐵)‘𝑘) ≤ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < ))))
153	150, 152	mpbird 248	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → (𝐻‘𝑖) ≤ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < ))
154		suprleub 11247	. . . . . . . . . . . . 13 ⊢ (((ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵) ⊆ ℝ ∧ ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵) ≠ ∅ ∧ ∃𝑦 ∈ ℝ ∀𝑧 ∈ ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)𝑧 ≤ 𝑦) ∧ (𝐻‘𝑖) ∈ ℝ) → (sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < ) ≤ (𝐻‘𝑖) ↔ ∀𝑧 ∈ ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)𝑧 ≤ (𝐻‘𝑖)))
155	80, 94, 129, 72, 154	syl31anc 1492	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → (sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < ) ≤ (𝐻‘𝑖) ↔ ∀𝑧 ∈ ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)𝑧 ≤ (𝐻‘𝑖)))
156	127, 155	mpbird 248	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < ) ≤ (𝐻‘𝑖))
157	73, 132, 153, 156	xrletrid 12193	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → (𝐻‘𝑖) = sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < ))
158	157	mpteq2dva 4905	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝑖 ∈ 𝑍 ↦ (𝐻‘𝑖)) = (𝑖 ∈ 𝑍 ↦ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < )))
159	69, 158	eqtrd 2799	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝐻 ↾ 𝑍) = (𝑖 ∈ 𝑍 ↦ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < )))
160	159	rneqd 5523	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ran (𝐻 ↾ 𝑍) = ran (𝑖 ∈ 𝑍 ↦ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < )))
161	64, 160	syl5eq 2811	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝐻 “ 𝑍) = ran (𝑖 ∈ 𝑍 ↦ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < )))
162	161	infeq1d 8594	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → inf((𝐻 “ 𝑍), ℝ, < ) = inf(ran (𝑖 ∈ 𝑍 ↦ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < )), ℝ, < ))
163	16, 63, 162	3eqtrd 2803	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) = inf(ran (𝑖 ∈ 𝑍 ↦ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < )), ℝ, < ))
164	163	mpteq2dva 4905	. . 3 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵))) = (𝑥 ∈ 𝐴 ↦ inf(ran (𝑖 ∈ 𝑍 ↦ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < )), ℝ, < )))
165	1, 164	syl5eq 2811	. 2 ⊢ (𝜑 → 𝐺 = (𝑥 ∈ 𝐴 ↦ inf(ran (𝑖 ∈ 𝑍 ↦ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < )), ℝ, < )))
166		eqid 2765	. . 3 ⊢ (𝑥 ∈ 𝐴 ↦ inf(ran (𝑖 ∈ 𝑍 ↦ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < )), ℝ, < )) = (𝑥 ∈ 𝐴 ↦ inf(ran (𝑖 ∈ 𝑍 ↦ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < )), ℝ, < ))
167		eqid 2765	. . . 4 ⊢ (ℤ_≥‘𝑖) = (ℤ_≥‘𝑖)
168		eqid 2765	. . . 4 ⊢ (𝑥 ∈ 𝐴 ↦ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < )) = (𝑥 ∈ 𝐴 ↦ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < ))
169		simpll 783	. . . . 5 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ_≥‘𝑖)) → 𝜑)
170	75	adantll 705	. . . . 5 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ_≥‘𝑖)) → 𝑛 ∈ 𝑍)
171		mbflimsup.5	. . . . 5 ⊢ ((𝜑 ∧ 𝑛 ∈ 𝑍) → (𝑥 ∈ 𝐴 ↦ 𝐵) ∈ MblFn)
172	169, 170, 171	syl2anc 579	. . . 4 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝑍) ∧ 𝑛 ∈ (ℤ_≥‘𝑖)) → (𝑥 ∈ 𝐴 ↦ 𝐵) ∈ MblFn)
173		simpll 783	. . . . 5 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝑍) ∧ (𝑛 ∈ (ℤ_≥‘𝑖) ∧ 𝑥 ∈ 𝐴)) → 𝜑)
174	75	ad2ant2lr 754	. . . . 5 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝑍) ∧ (𝑛 ∈ (ℤ_≥‘𝑖) ∧ 𝑥 ∈ 𝐴)) → 𝑛 ∈ 𝑍)
175		simprr 789	. . . . 5 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝑍) ∧ (𝑛 ∈ (ℤ_≥‘𝑖) ∧ 𝑥 ∈ 𝐴)) → 𝑥 ∈ 𝐴)
176	173, 174, 175, 19	syl12anc 865	. . . 4 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝑍) ∧ (𝑛 ∈ (ℤ_≥‘𝑖) ∧ 𝑥 ∈ 𝐴)) → 𝐵 ∈ ℝ)
177	78	ralrimiva 3113	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → ∀𝑛 ∈ (ℤ_≥‘𝑖)𝐵 ∈ ℝ)
178		breq1 4814	. . . . . . . . 9 ⊢ (𝑧 = 𝐵 → (𝑧 ≤ 𝑦 ↔ 𝐵 ≤ 𝑦))
179	81, 178	ralrnmpt 6562	. . . . . . . 8 ⊢ (∀𝑛 ∈ (ℤ_≥‘𝑖)𝐵 ∈ ℝ → (∀𝑧 ∈ ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)𝑧 ≤ 𝑦 ↔ ∀𝑛 ∈ (ℤ_≥‘𝑖)𝐵 ≤ 𝑦))
180	177, 179	syl 17	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → (∀𝑧 ∈ ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)𝑧 ≤ 𝑦 ↔ ∀𝑛 ∈ (ℤ_≥‘𝑖)𝐵 ≤ 𝑦))
181	180	rexbidv 3199	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → (∃𝑦 ∈ ℝ ∀𝑧 ∈ ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵)𝑧 ≤ 𝑦 ↔ ∃𝑦 ∈ ℝ ∀𝑛 ∈ (ℤ_≥‘𝑖)𝐵 ≤ 𝑦))
182	129, 181	mpbid 223	. . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → ∃𝑦 ∈ ℝ ∀𝑛 ∈ (ℤ_≥‘𝑖)𝐵 ≤ 𝑦)
183	182	an32s 642	. . . 4 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝑍) ∧ 𝑥 ∈ 𝐴) → ∃𝑦 ∈ ℝ ∀𝑛 ∈ (ℤ_≥‘𝑖)𝐵 ≤ 𝑦)
184	167, 168, 86, 172, 176, 183	mbfsup 23736	. . 3 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑍) → (𝑥 ∈ 𝐴 ↦ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < )) ∈ MblFn)
185	131	an32s 642	. . . 4 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝑍) ∧ 𝑥 ∈ 𝐴) → sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < ) ∈ ℝ)
186	185	anasss 458	. . 3 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑍 ∧ 𝑥 ∈ 𝐴)) → sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < ) ∈ ℝ)
187	2	limsuple 14508	. . . . . . . 8 ⊢ ((𝑍 ⊆ ℝ ∧ (𝑛 ∈ 𝑍 ↦ 𝐵):𝑍⟶ℝ^* ∧ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ∈ ℝ^*) → ((lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ↔ ∀𝑖 ∈ ℝ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ (𝐻‘𝑖)))
188	11, 44, 45, 187	syl3anc 1490	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ((lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ↔ ∀𝑖 ∈ ℝ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ (𝐻‘𝑖)))
189	42, 188	mpbid 223	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ∀𝑖 ∈ ℝ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ (𝐻‘𝑖))
190		ssralv 3828	. . . . . 6 ⊢ (𝑍 ⊆ ℝ → (∀𝑖 ∈ ℝ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ (𝐻‘𝑖) → ∀𝑖 ∈ 𝑍 (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ (𝐻‘𝑖)))
191	10, 189, 190	mpsyl 68	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ∀𝑖 ∈ 𝑍 (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ (𝐻‘𝑖))
192	157	breq2d 4823	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑖 ∈ 𝑍) → ((lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ (𝐻‘𝑖) ↔ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < )))
193	192	ralbidva 3132	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (∀𝑖 ∈ 𝑍 (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ (𝐻‘𝑖) ↔ ∀𝑖 ∈ 𝑍 (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < )))
194	191, 193	mpbid 223	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ∀𝑖 ∈ 𝑍 (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < ))
195		breq1 4814	. . . . . 6 ⊢ (𝑦 = (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) → (𝑦 ≤ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < ) ↔ (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < )))
196	195	ralbidv 3133	. . . . 5 ⊢ (𝑦 = (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) → (∀𝑖 ∈ 𝑍 𝑦 ≤ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < ) ↔ ∀𝑖 ∈ 𝑍 (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < )))
197	196	rspcev 3462	. . . 4 ⊢ (((lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ∈ ℝ ∧ ∀𝑖 ∈ 𝑍 (lim sup‘(𝑛 ∈ 𝑍 ↦ 𝐵)) ≤ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < )) → ∃𝑦 ∈ ℝ ∀𝑖 ∈ 𝑍 𝑦 ≤ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < ))
198	22, 194, 197	syl2anc 579	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ∃𝑦 ∈ ℝ ∀𝑖 ∈ 𝑍 𝑦 ≤ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < ))
199	3, 166, 12, 184, 186, 198	mbfinf 23737	. 2 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ inf(ran (𝑖 ∈ 𝑍 ↦ sup(ran (𝑛 ∈ (ℤ_≥‘𝑖) ↦ 𝐵), ℝ, < )), ℝ, < )) ∈ MblFn)
200	165, 199	eqeltrd 2844	1 ⊢ (𝜑 → 𝐺 ∈ MblFn)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 197 ∧ wa 384 = wceq 1652 ∈ wcel 2155 ≠ wne 2937 ∀wral 3055 ∃wrex 3056 Vcvv 3350 ∩ cin 3733 ⊆ wss 3734 ∅c0 4081 class class class wbr 4811 ↦ cmpt 4890 dom cdm 5279 ran crn 5280 ↾ cres 5281 “ cima 5282 Fn wfn 6065 ⟶wf 6066 ‘cfv 6070 (class class class)co 6846 supcsup 8557 infcinf 8558 ℝcr 10192 +∞cpnf 10329 ℝ^*cxr 10331 < clt 10332 ≤ cle 10333 ℤcz 11628 ℤ_≥cuz 11891 [,)cico 12384 lim supclsp 14500 MblFncmbf 23686

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1890 ax-4 1904 ax-5 2005 ax-6 2070 ax-7 2105 ax-8 2157 ax-9 2164 ax-10 2183 ax-11 2198 ax-12 2211 ax-13 2352 ax-ext 2743 ax-rep 4932 ax-sep 4943 ax-nul 4951 ax-pow 5003 ax-pr 5064 ax-un 7151 ax-inf2 8757 ax-cc 9514 ax-cnex 10249 ax-resscn 10250 ax-1cn 10251 ax-icn 10252 ax-addcl 10253 ax-addrcl 10254 ax-mulcl 10255 ax-mulrcl 10256 ax-mulcom 10257 ax-addass 10258 ax-mulass 10259 ax-distr 10260 ax-i2m1 10261 ax-1ne0 10262 ax-1rid 10263 ax-rnegex 10264 ax-rrecex 10265 ax-cnre 10266 ax-pre-lttri 10267 ax-pre-lttrn 10268 ax-pre-ltadd 10269 ax-pre-mulgt0 10270 ax-pre-sup 10271

This theorem depends on definitions: df-bi 198 df-an 385 df-or 874 df-3or 1108 df-3an 1109 df-tru 1656 df-fal 1666 df-ex 1875 df-nf 1879 df-sb 2063 df-mo 2565 df-eu 2582 df-clab 2752 df-cleq 2758 df-clel 2761 df-nfc 2896 df-ne 2938 df-nel 3041 df-ral 3060 df-rex 3061 df-reu 3062 df-rmo 3063 df-rab 3064 df-v 3352 df-sbc 3599 df-csb 3694 df-dif 3737 df-un 3739 df-in 3741 df-ss 3748 df-pss 3750 df-nul 4082 df-if 4246 df-pw 4319 df-sn 4337 df-pr 4339 df-tp 4341 df-op 4343 df-uni 4597 df-int 4636 df-iun 4680 df-disj 4780 df-br 4812 df-opab 4874 df-mpt 4891 df-tr 4914 df-id 5187 df-eprel 5192 df-po 5200 df-so 5201 df-fr 5238 df-se 5239 df-we 5240 df-xp 5285 df-rel 5286 df-cnv 5287 df-co 5288 df-dm 5289 df-rn 5290 df-res 5291 df-ima 5292 df-pred 5867 df-ord 5913 df-on 5914 df-lim 5915 df-suc 5916 df-iota 6033 df-fun 6072 df-fn 6073 df-f 6074 df-f1 6075 df-fo 6076 df-f1o 6077 df-fv 6078 df-isom 6079 df-riota 6807 df-ov 6849 df-oprab 6850 df-mpt2 6851 df-of 7099 df-om 7268 df-1st 7370 df-2nd 7371 df-wrecs 7614 df-recs 7676 df-rdg 7714 df-1o 7768 df-2o 7769 df-oadd 7772 df-omul 7773 df-er 7951 df-map 8066 df-pm 8067 df-en 8165 df-dom 8166 df-sdom 8167 df-fin 8168 df-sup 8559 df-inf 8560 df-oi 8626 df-card 9020 df-acn 9023 df-cda 9247 df-pnf 10334 df-mnf 10335 df-xr 10336 df-ltxr 10337 df-le 10338 df-sub 10526 df-neg 10527 df-div 10943 df-nn 11279 df-2 11339 df-3 11340 df-n0 11543 df-z 11629 df-uz 11892 df-q 11995 df-rp 12034 df-xadd 12152 df-ioo 12386 df-ioc 12387 df-ico 12388 df-icc 12389 df-fz 12539 df-fzo 12679 df-fl 12806 df-seq 13014 df-exp 13073 df-hash 13327 df-cj 14138 df-re 14139 df-im 14140 df-sqrt 14274 df-abs 14275 df-limsup 14501 df-clim 14518 df-rlim 14519 df-sum 14716 df-xmet 20026 df-met 20027 df-ovol 23536 df-vol 23537 df-mbf 23691

This theorem is referenced by: mbflimlem 23739

W3C validator