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Theorem dvivthlem1 25981

Description: Lemma for dvivth 25983. (Contributed by Mario Carneiro, 24-Feb-2015.)

**Hypotheses**
Ref	Expression
dvivth.1	⊢ (𝜑 → 𝑀 ∈ (𝐴(,)𝐵))
dvivth.2	⊢ (𝜑 → 𝑁 ∈ (𝐴(,)𝐵))
dvivth.3	⊢ (𝜑 → 𝐹 ∈ ((𝐴(,)𝐵)–cn→ℝ))
dvivth.4	⊢ (𝜑 → dom (ℝ D 𝐹) = (𝐴(,)𝐵))
dvivth.5	⊢ (𝜑 → 𝑀 < 𝑁)
dvivth.6	⊢ (𝜑 → 𝐶 ∈ (((ℝ D 𝐹)‘𝑁)[,]((ℝ D 𝐹)‘𝑀)))
dvivth.7	⊢ 𝐺 = (𝑦 ∈ (𝐴(,)𝐵) ↦ ((𝐹‘𝑦) − (𝐶 · 𝑦)))

**Assertion**
Ref	Expression
dvivthlem1	⊢ (𝜑 → ∃𝑥 ∈ (𝑀[,]𝑁)((ℝ D 𝐹)‘𝑥) = 𝐶)

Distinct variable groups: 𝑥,𝑦,𝐴 𝑥,𝐵,𝑦 𝑥,𝐹,𝑦 𝑥,𝐺 𝑥,𝑀,𝑦 𝑥,𝐶,𝑦 𝑥,𝑁,𝑦 𝜑,𝑥,𝑦 Allowed substitution hint: 𝐺(𝑦)

Proof of Theorem dvivthlem1 Dummy variables 𝑤 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		ioossre 13335	. . . . 5 ⊢ (𝐴(,)𝐵) ⊆ ℝ
2		dvivth.1	. . . . 5 ⊢ (𝜑 → 𝑀 ∈ (𝐴(,)𝐵))
3	1, 2	sselid 3933	. . . 4 ⊢ (𝜑 → 𝑀 ∈ ℝ)
4		dvivth.2	. . . . 5 ⊢ (𝜑 → 𝑁 ∈ (𝐴(,)𝐵))
5	1, 4	sselid 3933	. . . 4 ⊢ (𝜑 → 𝑁 ∈ ℝ)
6		dvivth.5	. . . . 5 ⊢ (𝜑 → 𝑀 < 𝑁)
7	3, 5, 6	ltled 11293	. . . 4 ⊢ (𝜑 → 𝑀 ≤ 𝑁)
8		dvivth.3	. . . . . . . . . 10 ⊢ (𝜑 → 𝐹 ∈ ((𝐴(,)𝐵)–cn→ℝ))
9		cncff 24854	. . . . . . . . . 10 ⊢ (𝐹 ∈ ((𝐴(,)𝐵)–cn→ℝ) → 𝐹:(𝐴(,)𝐵)⟶ℝ)
10	8, 9	syl 17	. . . . . . . . 9 ⊢ (𝜑 → 𝐹:(𝐴(,)𝐵)⟶ℝ)
11	10	ffvelcdmda 7038	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐴(,)𝐵)) → (𝐹‘𝑦) ∈ ℝ)
12		dvfre 25923	. . . . . . . . . . . . . 14 ⊢ ((𝐹:(𝐴(,)𝐵)⟶ℝ ∧ (𝐴(,)𝐵) ⊆ ℝ) → (ℝ D 𝐹):dom (ℝ D 𝐹)⟶ℝ)
13	10, 1, 12	sylancl 587	. . . . . . . . . . . . 13 ⊢ (𝜑 → (ℝ D 𝐹):dom (ℝ D 𝐹)⟶ℝ)
14		dvivth.4	. . . . . . . . . . . . . 14 ⊢ (𝜑 → dom (ℝ D 𝐹) = (𝐴(,)𝐵))
15	4, 14	eleqtrrd 2840	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝑁 ∈ dom (ℝ D 𝐹))
16	13, 15	ffvelcdmd 7039	. . . . . . . . . . . 12 ⊢ (𝜑 → ((ℝ D 𝐹)‘𝑁) ∈ ℝ)
17	2, 14	eleqtrrd 2840	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝑀 ∈ dom (ℝ D 𝐹))
18	13, 17	ffvelcdmd 7039	. . . . . . . . . . . 12 ⊢ (𝜑 → ((ℝ D 𝐹)‘𝑀) ∈ ℝ)
19		iccssre 13357	. . . . . . . . . . . 12 ⊢ ((((ℝ D 𝐹)‘𝑁) ∈ ℝ ∧ ((ℝ D 𝐹)‘𝑀) ∈ ℝ) → (((ℝ D 𝐹)‘𝑁)[,]((ℝ D 𝐹)‘𝑀)) ⊆ ℝ)
20	16, 18, 19	syl2anc 585	. . . . . . . . . . 11 ⊢ (𝜑 → (((ℝ D 𝐹)‘𝑁)[,]((ℝ D 𝐹)‘𝑀)) ⊆ ℝ)
21		dvivth.6	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐶 ∈ (((ℝ D 𝐹)‘𝑁)[,]((ℝ D 𝐹)‘𝑀)))
22	20, 21	sseldd 3936	. . . . . . . . . 10 ⊢ (𝜑 → 𝐶 ∈ ℝ)
23	22	adantr 480	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐴(,)𝐵)) → 𝐶 ∈ ℝ)
24	1	a1i 11	. . . . . . . . . 10 ⊢ (𝜑 → (𝐴(,)𝐵) ⊆ ℝ)
25	24	sselda 3935	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐴(,)𝐵)) → 𝑦 ∈ ℝ)
26	23, 25	remulcld 11174	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐴(,)𝐵)) → (𝐶 · 𝑦) ∈ ℝ)
27	11, 26	resubcld 11577	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐴(,)𝐵)) → ((𝐹‘𝑦) − (𝐶 · 𝑦)) ∈ ℝ)
28		dvivth.7	. . . . . . 7 ⊢ 𝐺 = (𝑦 ∈ (𝐴(,)𝐵) ↦ ((𝐹‘𝑦) − (𝐶 · 𝑦)))
29	27, 28	fmptd 7068	. . . . . 6 ⊢ (𝜑 → 𝐺:(𝐴(,)𝐵)⟶ℝ)
30		iccssioo2 13347	. . . . . . 7 ⊢ ((𝑀 ∈ (𝐴(,)𝐵) ∧ 𝑁 ∈ (𝐴(,)𝐵)) → (𝑀[,]𝑁) ⊆ (𝐴(,)𝐵))
31	2, 4, 30	syl2anc 585	. . . . . 6 ⊢ (𝜑 → (𝑀[,]𝑁) ⊆ (𝐴(,)𝐵))
32	29, 31	fssresd 6709	. . . . 5 ⊢ (𝜑 → (𝐺 ↾ (𝑀[,]𝑁)):(𝑀[,]𝑁)⟶ℝ)
33		ax-resscn 11095	. . . . . 6 ⊢ ℝ ⊆ ℂ
34	33	a1i 11	. . . . . . . 8 ⊢ (𝜑 → ℝ ⊆ ℂ)
35		fss 6686	. . . . . . . . 9 ⊢ ((𝐺:(𝐴(,)𝐵)⟶ℝ ∧ ℝ ⊆ ℂ) → 𝐺:(𝐴(,)𝐵)⟶ℂ)
36	29, 33, 35	sylancl 587	. . . . . . . 8 ⊢ (𝜑 → 𝐺:(𝐴(,)𝐵)⟶ℂ)
37	28	oveq2i 7379	. . . . . . . . . . 11 ⊢ (ℝ D 𝐺) = (ℝ D (𝑦 ∈ (𝐴(,)𝐵) ↦ ((𝐹‘𝑦) − (𝐶 · 𝑦))))
38		reelprrecn 11130	. . . . . . . . . . . . 13 ⊢ ℝ ∈ {ℝ, ℂ}
39	38	a1i 11	. . . . . . . . . . . 12 ⊢ (𝜑 → ℝ ∈ {ℝ, ℂ})
40	11	recnd 11172	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐴(,)𝐵)) → (𝐹‘𝑦) ∈ ℂ)
41	14	feq2d 6654	. . . . . . . . . . . . . 14 ⊢ (𝜑 → ((ℝ D 𝐹):dom (ℝ D 𝐹)⟶ℝ ↔ (ℝ D 𝐹):(𝐴(,)𝐵)⟶ℝ))
42	13, 41	mpbid 232	. . . . . . . . . . . . 13 ⊢ (𝜑 → (ℝ D 𝐹):(𝐴(,)𝐵)⟶ℝ)
43	42	ffvelcdmda 7038	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐴(,)𝐵)) → ((ℝ D 𝐹)‘𝑦) ∈ ℝ)
44	10	feqmptd 6910	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝐹 = (𝑦 ∈ (𝐴(,)𝐵) ↦ (𝐹‘𝑦)))
45	44	oveq2d 7384	. . . . . . . . . . . . 13 ⊢ (𝜑 → (ℝ D 𝐹) = (ℝ D (𝑦 ∈ (𝐴(,)𝐵) ↦ (𝐹‘𝑦))))
46	42	feqmptd 6910	. . . . . . . . . . . . 13 ⊢ (𝜑 → (ℝ D 𝐹) = (𝑦 ∈ (𝐴(,)𝐵) ↦ ((ℝ D 𝐹)‘𝑦)))
47	45, 46	eqtr3d 2774	. . . . . . . . . . . 12 ⊢ (𝜑 → (ℝ D (𝑦 ∈ (𝐴(,)𝐵) ↦ (𝐹‘𝑦))) = (𝑦 ∈ (𝐴(,)𝐵) ↦ ((ℝ D 𝐹)‘𝑦)))
48	26	recnd 11172	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑦 ∈ (𝐴(,)𝐵)) → (𝐶 · 𝑦) ∈ ℂ)
49		remulcl 11123	. . . . . . . . . . . . . . 15 ⊢ ((𝐶 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (𝐶 · 𝑦) ∈ ℝ)
50	22, 49	sylan 581	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ) → (𝐶 · 𝑦) ∈ ℝ)
51	50	recnd 11172	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ) → (𝐶 · 𝑦) ∈ ℂ)
52	22	adantr 480	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ) → 𝐶 ∈ ℝ)
53	34	sselda 3935	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ) → 𝑦 ∈ ℂ)
54		1cnd 11139	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ) → 1 ∈ ℂ)
55	39	dvmptid 25929	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (ℝ D (𝑦 ∈ ℝ ↦ 𝑦)) = (𝑦 ∈ ℝ ↦ 1))
56	22	recnd 11172	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → 𝐶 ∈ ℂ)
57	39, 53, 54, 55, 56	dvmptcmul 25936	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (ℝ D (𝑦 ∈ ℝ ↦ (𝐶 · 𝑦))) = (𝑦 ∈ ℝ ↦ (𝐶 · 1)))
58	56	mulridd 11161	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (𝐶 · 1) = 𝐶)
59	58	mpteq2dv 5194	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (𝑦 ∈ ℝ ↦ (𝐶 · 1)) = (𝑦 ∈ ℝ ↦ 𝐶))
60	57, 59	eqtrd 2772	. . . . . . . . . . . . 13 ⊢ (𝜑 → (ℝ D (𝑦 ∈ ℝ ↦ (𝐶 · 𝑦))) = (𝑦 ∈ ℝ ↦ 𝐶))
61		tgioo4 24761	. . . . . . . . . . . . 13 ⊢ (topGen‘ran (,)) = ((TopOpen‘ℂ_fld) ↾_t ℝ)
62		eqid 2737	. . . . . . . . . . . . 13 ⊢ (TopOpen‘ℂ_fld) = (TopOpen‘ℂ_fld)
63		iooretop 24721	. . . . . . . . . . . . . 14 ⊢ (𝐴(,)𝐵) ∈ (topGen‘ran (,))
64	63	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐴(,)𝐵) ∈ (topGen‘ran (,)))
65	39, 51, 52, 60, 24, 61, 62, 64	dvmptres 25935	. . . . . . . . . . . 12 ⊢ (𝜑 → (ℝ D (𝑦 ∈ (𝐴(,)𝐵) ↦ (𝐶 · 𝑦))) = (𝑦 ∈ (𝐴(,)𝐵) ↦ 𝐶))
66	39, 40, 43, 47, 48, 23, 65	dvmptsub 25939	. . . . . . . . . . 11 ⊢ (𝜑 → (ℝ D (𝑦 ∈ (𝐴(,)𝐵) ↦ ((𝐹‘𝑦) − (𝐶 · 𝑦)))) = (𝑦 ∈ (𝐴(,)𝐵) ↦ (((ℝ D 𝐹)‘𝑦) − 𝐶)))
67	37, 66	eqtrid 2784	. . . . . . . . . 10 ⊢ (𝜑 → (ℝ D 𝐺) = (𝑦 ∈ (𝐴(,)𝐵) ↦ (((ℝ D 𝐹)‘𝑦) − 𝐶)))
68	67	dmeqd 5862	. . . . . . . . 9 ⊢ (𝜑 → dom (ℝ D 𝐺) = dom (𝑦 ∈ (𝐴(,)𝐵) ↦ (((ℝ D 𝐹)‘𝑦) − 𝐶)))
69		dmmptg 6208	. . . . . . . . . 10 ⊢ (∀𝑦 ∈ (𝐴(,)𝐵)(((ℝ D 𝐹)‘𝑦) − 𝐶) ∈ V → dom (𝑦 ∈ (𝐴(,)𝐵) ↦ (((ℝ D 𝐹)‘𝑦) − 𝐶)) = (𝐴(,)𝐵))
70		ovex 7401	. . . . . . . . . . 11 ⊢ (((ℝ D 𝐹)‘𝑦) − 𝐶) ∈ V
71	70	a1i 11	. . . . . . . . . 10 ⊢ (𝑦 ∈ (𝐴(,)𝐵) → (((ℝ D 𝐹)‘𝑦) − 𝐶) ∈ V)
72	69, 71	mprg 3058	. . . . . . . . 9 ⊢ dom (𝑦 ∈ (𝐴(,)𝐵) ↦ (((ℝ D 𝐹)‘𝑦) − 𝐶)) = (𝐴(,)𝐵)
73	68, 72	eqtrdi 2788	. . . . . . . 8 ⊢ (𝜑 → dom (ℝ D 𝐺) = (𝐴(,)𝐵))
74		dvcn 25891	. . . . . . . 8 ⊢ (((ℝ ⊆ ℂ ∧ 𝐺:(𝐴(,)𝐵)⟶ℂ ∧ (𝐴(,)𝐵) ⊆ ℝ) ∧ dom (ℝ D 𝐺) = (𝐴(,)𝐵)) → 𝐺 ∈ ((𝐴(,)𝐵)–cn→ℂ))
75	34, 36, 24, 73, 74	syl31anc 1376	. . . . . . 7 ⊢ (𝜑 → 𝐺 ∈ ((𝐴(,)𝐵)–cn→ℂ))
76		rescncf 24858	. . . . . . 7 ⊢ ((𝑀[,]𝑁) ⊆ (𝐴(,)𝐵) → (𝐺 ∈ ((𝐴(,)𝐵)–cn→ℂ) → (𝐺 ↾ (𝑀[,]𝑁)) ∈ ((𝑀[,]𝑁)–cn→ℂ)))
77	31, 75, 76	sylc 65	. . . . . 6 ⊢ (𝜑 → (𝐺 ↾ (𝑀[,]𝑁)) ∈ ((𝑀[,]𝑁)–cn→ℂ))
78		cncfcdm 24859	. . . . . 6 ⊢ ((ℝ ⊆ ℂ ∧ (𝐺 ↾ (𝑀[,]𝑁)) ∈ ((𝑀[,]𝑁)–cn→ℂ)) → ((𝐺 ↾ (𝑀[,]𝑁)) ∈ ((𝑀[,]𝑁)–cn→ℝ) ↔ (𝐺 ↾ (𝑀[,]𝑁)):(𝑀[,]𝑁)⟶ℝ))
79	33, 77, 78	sylancr 588	. . . . 5 ⊢ (𝜑 → ((𝐺 ↾ (𝑀[,]𝑁)) ∈ ((𝑀[,]𝑁)–cn→ℝ) ↔ (𝐺 ↾ (𝑀[,]𝑁)):(𝑀[,]𝑁)⟶ℝ))
80	32, 79	mpbird 257	. . . 4 ⊢ (𝜑 → (𝐺 ↾ (𝑀[,]𝑁)) ∈ ((𝑀[,]𝑁)–cn→ℝ))
81	3, 5, 7, 80	evthicc 25428	. . 3 ⊢ (𝜑 → (∃𝑥 ∈ (𝑀[,]𝑁)∀𝑧 ∈ (𝑀[,]𝑁)((𝐺 ↾ (𝑀[,]𝑁))‘𝑧) ≤ ((𝐺 ↾ (𝑀[,]𝑁))‘𝑥) ∧ ∃𝑥 ∈ (𝑀[,]𝑁)∀𝑧 ∈ (𝑀[,]𝑁)((𝐺 ↾ (𝑀[,]𝑁))‘𝑥) ≤ ((𝐺 ↾ (𝑀[,]𝑁))‘𝑧)))
82	81	simpld 494	. 2 ⊢ (𝜑 → ∃𝑥 ∈ (𝑀[,]𝑁)∀𝑧 ∈ (𝑀[,]𝑁)((𝐺 ↾ (𝑀[,]𝑁))‘𝑧) ≤ ((𝐺 ↾ (𝑀[,]𝑁))‘𝑥))
83		fvres 6861	. . . . . . . 8 ⊢ (𝑧 ∈ (𝑀[,]𝑁) → ((𝐺 ↾ (𝑀[,]𝑁))‘𝑧) = (𝐺‘𝑧))
84		fvres 6861	. . . . . . . 8 ⊢ (𝑥 ∈ (𝑀[,]𝑁) → ((𝐺 ↾ (𝑀[,]𝑁))‘𝑥) = (𝐺‘𝑥))
85	83, 84	breqan12rd 5117	. . . . . . 7 ⊢ ((𝑥 ∈ (𝑀[,]𝑁) ∧ 𝑧 ∈ (𝑀[,]𝑁)) → (((𝐺 ↾ (𝑀[,]𝑁))‘𝑧) ≤ ((𝐺 ↾ (𝑀[,]𝑁))‘𝑥) ↔ (𝐺‘𝑧) ≤ (𝐺‘𝑥)))
86	85	ralbidva 3159	. . . . . 6 ⊢ (𝑥 ∈ (𝑀[,]𝑁) → (∀𝑧 ∈ (𝑀[,]𝑁)((𝐺 ↾ (𝑀[,]𝑁))‘𝑧) ≤ ((𝐺 ↾ (𝑀[,]𝑁))‘𝑥) ↔ ∀𝑧 ∈ (𝑀[,]𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥)))
87	86	adantl 481	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) → (∀𝑧 ∈ (𝑀[,]𝑁)((𝐺 ↾ (𝑀[,]𝑁))‘𝑧) ≤ ((𝐺 ↾ (𝑀[,]𝑁))‘𝑥) ↔ ∀𝑧 ∈ (𝑀[,]𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥)))
88		ioossicc 13361	. . . . . 6 ⊢ (𝑀(,)𝑁) ⊆ (𝑀[,]𝑁)
89		ssralv 4004	. . . . . 6 ⊢ ((𝑀(,)𝑁) ⊆ (𝑀[,]𝑁) → (∀𝑧 ∈ (𝑀[,]𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥) → ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥)))
90	88, 89	ax-mp 5	. . . . 5 ⊢ (∀𝑧 ∈ (𝑀[,]𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥) → ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))
91	87, 90	biimtrdi 253	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) → (∀𝑧 ∈ (𝑀[,]𝑁)((𝐺 ↾ (𝑀[,]𝑁))‘𝑧) ≤ ((𝐺 ↾ (𝑀[,]𝑁))‘𝑥) → ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥)))
92	31	sselda 3935	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) → 𝑥 ∈ (𝐴(,)𝐵))
93	42	ffvelcdmda 7038	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝐴(,)𝐵)) → ((ℝ D 𝐹)‘𝑥) ∈ ℝ)
94	92, 93	syldan 592	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) → ((ℝ D 𝐹)‘𝑥) ∈ ℝ)
95	94	recnd 11172	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) → ((ℝ D 𝐹)‘𝑥) ∈ ℂ)
96	95	adantr 480	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 ∈ (𝑀(,)𝑁) ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ((ℝ D 𝐹)‘𝑥) ∈ ℂ)
97	56	ad2antrr 727	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 ∈ (𝑀(,)𝑁) ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → 𝐶 ∈ ℂ)
98	67	fveq1d 6844	. . . . . . . . . . 11 ⊢ (𝜑 → ((ℝ D 𝐺)‘𝑥) = ((𝑦 ∈ (𝐴(,)𝐵) ↦ (((ℝ D 𝐹)‘𝑦) − 𝐶))‘𝑥))
99	98	adantr 480	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) → ((ℝ D 𝐺)‘𝑥) = ((𝑦 ∈ (𝐴(,)𝐵) ↦ (((ℝ D 𝐹)‘𝑦) − 𝐶))‘𝑥))
100		fveq2 6842	. . . . . . . . . . . . 13 ⊢ (𝑦 = 𝑥 → ((ℝ D 𝐹)‘𝑦) = ((ℝ D 𝐹)‘𝑥))
101	100	oveq1d 7383	. . . . . . . . . . . 12 ⊢ (𝑦 = 𝑥 → (((ℝ D 𝐹)‘𝑦) − 𝐶) = (((ℝ D 𝐹)‘𝑥) − 𝐶))
102		eqid 2737	. . . . . . . . . . . 12 ⊢ (𝑦 ∈ (𝐴(,)𝐵) ↦ (((ℝ D 𝐹)‘𝑦) − 𝐶)) = (𝑦 ∈ (𝐴(,)𝐵) ↦ (((ℝ D 𝐹)‘𝑦) − 𝐶))
103		ovex 7401	. . . . . . . . . . . 12 ⊢ (((ℝ D 𝐹)‘𝑥) − 𝐶) ∈ V
104	101, 102, 103	fvmpt 6949	. . . . . . . . . . 11 ⊢ (𝑥 ∈ (𝐴(,)𝐵) → ((𝑦 ∈ (𝐴(,)𝐵) ↦ (((ℝ D 𝐹)‘𝑦) − 𝐶))‘𝑥) = (((ℝ D 𝐹)‘𝑥) − 𝐶))
105	92, 104	syl 17	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) → ((𝑦 ∈ (𝐴(,)𝐵) ↦ (((ℝ D 𝐹)‘𝑦) − 𝐶))‘𝑥) = (((ℝ D 𝐹)‘𝑥) − 𝐶))
106	99, 105	eqtrd 2772	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) → ((ℝ D 𝐺)‘𝑥) = (((ℝ D 𝐹)‘𝑥) − 𝐶))
107	106	adantr 480	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 ∈ (𝑀(,)𝑁) ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ((ℝ D 𝐺)‘𝑥) = (((ℝ D 𝐹)‘𝑥) − 𝐶))
108	29	ad2antrr 727	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 ∈ (𝑀(,)𝑁) ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → 𝐺:(𝐴(,)𝐵)⟶ℝ)
109	1	a1i 11	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 ∈ (𝑀(,)𝑁) ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → (𝐴(,)𝐵) ⊆ ℝ)
110		simprl 771	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 ∈ (𝑀(,)𝑁) ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → 𝑥 ∈ (𝑀(,)𝑁))
111	88, 31	sstrid 3947	. . . . . . . . . 10 ⊢ (𝜑 → (𝑀(,)𝑁) ⊆ (𝐴(,)𝐵))
112	111	ad2antrr 727	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 ∈ (𝑀(,)𝑁) ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → (𝑀(,)𝑁) ⊆ (𝐴(,)𝐵))
113	92	adantr 480	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 ∈ (𝑀(,)𝑁) ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → 𝑥 ∈ (𝐴(,)𝐵))
114	73	ad2antrr 727	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 ∈ (𝑀(,)𝑁) ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → dom (ℝ D 𝐺) = (𝐴(,)𝐵))
115	113, 114	eleqtrrd 2840	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 ∈ (𝑀(,)𝑁) ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → 𝑥 ∈ dom (ℝ D 𝐺))
116		simprr 773	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 ∈ (𝑀(,)𝑁) ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))
117		fveq2 6842	. . . . . . . . . . . 12 ⊢ (𝑧 = 𝑤 → (𝐺‘𝑧) = (𝐺‘𝑤))
118	117	breq1d 5110	. . . . . . . . . . 11 ⊢ (𝑧 = 𝑤 → ((𝐺‘𝑧) ≤ (𝐺‘𝑥) ↔ (𝐺‘𝑤) ≤ (𝐺‘𝑥)))
119	118	cbvralvw 3216	. . . . . . . . . 10 ⊢ (∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥) ↔ ∀𝑤 ∈ (𝑀(,)𝑁)(𝐺‘𝑤) ≤ (𝐺‘𝑥))
120	116, 119	sylib 218	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 ∈ (𝑀(,)𝑁) ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ∀𝑤 ∈ (𝑀(,)𝑁)(𝐺‘𝑤) ≤ (𝐺‘𝑥))
121	108, 109, 110, 112, 115, 120	dvferm 25960	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 ∈ (𝑀(,)𝑁) ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ((ℝ D 𝐺)‘𝑥) = 0)
122	107, 121	eqtr3d 2774	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 ∈ (𝑀(,)𝑁) ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → (((ℝ D 𝐹)‘𝑥) − 𝐶) = 0)
123	96, 97, 122	subeq0d 11512	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 ∈ (𝑀(,)𝑁) ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ((ℝ D 𝐹)‘𝑥) = 𝐶)
124	123	exp32 420	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) → (𝑥 ∈ (𝑀(,)𝑁) → (∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥) → ((ℝ D 𝐹)‘𝑥) = 𝐶)))
125		vex 3446	. . . . . . 7 ⊢ 𝑥 ∈ V
126	125	elpr 4607	. . . . . 6 ⊢ (𝑥 ∈ {𝑀, 𝑁} ↔ (𝑥 = 𝑀 ∨ 𝑥 = 𝑁))
127	106	adantr 480	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ((ℝ D 𝐺)‘𝑥) = (((ℝ D 𝐹)‘𝑥) − 𝐶))
128	29	ad2antrr 727	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → 𝐺:(𝐴(,)𝐵)⟶ℝ)
129	1	a1i 11	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → (𝐴(,)𝐵) ⊆ ℝ)
130		simprl 771	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → 𝑥 = 𝑀)
131		eliooord 13333	. . . . . . . . . . . . . . . . 17 ⊢ (𝑀 ∈ (𝐴(,)𝐵) → (𝐴 < 𝑀 ∧ 𝑀 < 𝐵))
132	2, 131	syl 17	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → (𝐴 < 𝑀 ∧ 𝑀 < 𝐵))
133	132	simpld 494	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → 𝐴 < 𝑀)
134		ne0i 4295	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑀 ∈ (𝐴(,)𝐵) → (𝐴(,)𝐵) ≠ ∅)
135		ndmioo 13300	. . . . . . . . . . . . . . . . . . 19 ⊢ (¬ (𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^*) → (𝐴(,)𝐵) = ∅)
136	135	necon1ai 2960	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐴(,)𝐵) ≠ ∅ → (𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^*))
137	2, 134, 136	3syl 18	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → (𝐴 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^*))
138	137	simpld 494	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → 𝐴 ∈ ℝ^*)
139	5	rexrd 11194	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → 𝑁 ∈ ℝ^*)
140		elioo2 13314	. . . . . . . . . . . . . . . 16 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝑁 ∈ ℝ^*) → (𝑀 ∈ (𝐴(,)𝑁) ↔ (𝑀 ∈ ℝ ∧ 𝐴 < 𝑀 ∧ 𝑀 < 𝑁)))
141	138, 139, 140	syl2anc 585	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (𝑀 ∈ (𝐴(,)𝑁) ↔ (𝑀 ∈ ℝ ∧ 𝐴 < 𝑀 ∧ 𝑀 < 𝑁)))
142	3, 133, 6, 141	mpbir3and 1344	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝑀 ∈ (𝐴(,)𝑁))
143	142	ad2antrr 727	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → 𝑀 ∈ (𝐴(,)𝑁))
144	130, 143	eqeltrd 2837	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → 𝑥 ∈ (𝐴(,)𝑁))
145	137	simprd 495	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝐵 ∈ ℝ^*)
146		eliooord 13333	. . . . . . . . . . . . . . . . 17 ⊢ (𝑁 ∈ (𝐴(,)𝐵) → (𝐴 < 𝑁 ∧ 𝑁 < 𝐵))
147	4, 146	syl 17	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → (𝐴 < 𝑁 ∧ 𝑁 < 𝐵))
148	147	simprd 495	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → 𝑁 < 𝐵)
149	139, 145, 148	xrltled 13076	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝑁 ≤ 𝐵)
150		iooss2 13309	. . . . . . . . . . . . . 14 ⊢ ((𝐵 ∈ ℝ^* ∧ 𝑁 ≤ 𝐵) → (𝐴(,)𝑁) ⊆ (𝐴(,)𝐵))
151	145, 149, 150	syl2anc 585	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐴(,)𝑁) ⊆ (𝐴(,)𝐵))
152	151	ad2antrr 727	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → (𝐴(,)𝑁) ⊆ (𝐴(,)𝐵))
153	92	adantr 480	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → 𝑥 ∈ (𝐴(,)𝐵))
154	73	ad2antrr 727	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → dom (ℝ D 𝐺) = (𝐴(,)𝐵))
155	153, 154	eleqtrrd 2840	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → 𝑥 ∈ dom (ℝ D 𝐺))
156		simprr 773	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))
157	156, 119	sylib 218	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ∀𝑤 ∈ (𝑀(,)𝑁)(𝐺‘𝑤) ≤ (𝐺‘𝑥))
158	130	oveq1d 7383	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → (𝑥(,)𝑁) = (𝑀(,)𝑁))
159	157, 158	raleqtrrdv 3302	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ∀𝑤 ∈ (𝑥(,)𝑁)(𝐺‘𝑤) ≤ (𝐺‘𝑥))
160	128, 129, 144, 152, 155, 159	dvferm1 25957	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ((ℝ D 𝐺)‘𝑥) ≤ 0)
161	127, 160	eqbrtrrd 5124	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → (((ℝ D 𝐹)‘𝑥) − 𝐶) ≤ 0)
162	94	adantr 480	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ((ℝ D 𝐹)‘𝑥) ∈ ℝ)
163	22	ad2antrr 727	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → 𝐶 ∈ ℝ)
164	162, 163	suble0d 11740	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ((((ℝ D 𝐹)‘𝑥) − 𝐶) ≤ 0 ↔ ((ℝ D 𝐹)‘𝑥) ≤ 𝐶))
165	161, 164	mpbid 232	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ((ℝ D 𝐹)‘𝑥) ≤ 𝐶)
166		elicc2 13339	. . . . . . . . . . . . . 14 ⊢ ((((ℝ D 𝐹)‘𝑁) ∈ ℝ ∧ ((ℝ D 𝐹)‘𝑀) ∈ ℝ) → (𝐶 ∈ (((ℝ D 𝐹)‘𝑁)[,]((ℝ D 𝐹)‘𝑀)) ↔ (𝐶 ∈ ℝ ∧ ((ℝ D 𝐹)‘𝑁) ≤ 𝐶 ∧ 𝐶 ≤ ((ℝ D 𝐹)‘𝑀))))
167	16, 18, 166	syl2anc 585	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐶 ∈ (((ℝ D 𝐹)‘𝑁)[,]((ℝ D 𝐹)‘𝑀)) ↔ (𝐶 ∈ ℝ ∧ ((ℝ D 𝐹)‘𝑁) ≤ 𝐶 ∧ 𝐶 ≤ ((ℝ D 𝐹)‘𝑀))))
168	21, 167	mpbid 232	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝐶 ∈ ℝ ∧ ((ℝ D 𝐹)‘𝑁) ≤ 𝐶 ∧ 𝐶 ≤ ((ℝ D 𝐹)‘𝑀)))
169	168	simp3d 1145	. . . . . . . . . . 11 ⊢ (𝜑 → 𝐶 ≤ ((ℝ D 𝐹)‘𝑀))
170	169	ad2antrr 727	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → 𝐶 ≤ ((ℝ D 𝐹)‘𝑀))
171	130	fveq2d 6846	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ((ℝ D 𝐹)‘𝑥) = ((ℝ D 𝐹)‘𝑀))
172	170, 171	breqtrrd 5128	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → 𝐶 ≤ ((ℝ D 𝐹)‘𝑥))
173	162, 163	letri3d 11287	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → (((ℝ D 𝐹)‘𝑥) = 𝐶 ↔ (((ℝ D 𝐹)‘𝑥) ≤ 𝐶 ∧ 𝐶 ≤ ((ℝ D 𝐹)‘𝑥))))
174	165, 172, 173	mpbir2and 714	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑀 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ((ℝ D 𝐹)‘𝑥) = 𝐶)
175	174	exp32 420	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) → (𝑥 = 𝑀 → (∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥) → ((ℝ D 𝐹)‘𝑥) = 𝐶)))
176		simprl 771	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → 𝑥 = 𝑁)
177	176	fveq2d 6846	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ((ℝ D 𝐹)‘𝑥) = ((ℝ D 𝐹)‘𝑁))
178	168	simp2d 1144	. . . . . . . . . . 11 ⊢ (𝜑 → ((ℝ D 𝐹)‘𝑁) ≤ 𝐶)
179	178	ad2antrr 727	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ((ℝ D 𝐹)‘𝑁) ≤ 𝐶)
180	177, 179	eqbrtrd 5122	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ((ℝ D 𝐹)‘𝑥) ≤ 𝐶)
181	29	ad2antrr 727	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → 𝐺:(𝐴(,)𝐵)⟶ℝ)
182	1	a1i 11	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → (𝐴(,)𝐵) ⊆ ℝ)
183	3	rexrd 11194	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → 𝑀 ∈ ℝ^*)
184		elioo2 13314	. . . . . . . . . . . . . . . 16 ⊢ ((𝑀 ∈ ℝ^* ∧ 𝐵 ∈ ℝ^*) → (𝑁 ∈ (𝑀(,)𝐵) ↔ (𝑁 ∈ ℝ ∧ 𝑀 < 𝑁 ∧ 𝑁 < 𝐵)))
185	183, 145, 184	syl2anc 585	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (𝑁 ∈ (𝑀(,)𝐵) ↔ (𝑁 ∈ ℝ ∧ 𝑀 < 𝑁 ∧ 𝑁 < 𝐵)))
186	5, 6, 148, 185	mpbir3and 1344	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝑁 ∈ (𝑀(,)𝐵))
187	186	ad2antrr 727	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → 𝑁 ∈ (𝑀(,)𝐵))
188	176, 187	eqeltrd 2837	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → 𝑥 ∈ (𝑀(,)𝐵))
189	138, 183, 133	xrltled 13076	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝐴 ≤ 𝑀)
190		iooss1 13308	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ ℝ^* ∧ 𝐴 ≤ 𝑀) → (𝑀(,)𝐵) ⊆ (𝐴(,)𝐵))
191	138, 189, 190	syl2anc 585	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑀(,)𝐵) ⊆ (𝐴(,)𝐵))
192	191	ad2antrr 727	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → (𝑀(,)𝐵) ⊆ (𝐴(,)𝐵))
193	92	adantr 480	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → 𝑥 ∈ (𝐴(,)𝐵))
194	73	ad2antrr 727	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → dom (ℝ D 𝐺) = (𝐴(,)𝐵))
195	193, 194	eleqtrrd 2840	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → 𝑥 ∈ dom (ℝ D 𝐺))
196		simprr 773	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))
197	196, 119	sylib 218	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ∀𝑤 ∈ (𝑀(,)𝑁)(𝐺‘𝑤) ≤ (𝐺‘𝑥))
198	176	oveq2d 7384	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → (𝑀(,)𝑥) = (𝑀(,)𝑁))
199	197, 198	raleqtrrdv 3302	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ∀𝑤 ∈ (𝑀(,)𝑥)(𝐺‘𝑤) ≤ (𝐺‘𝑥))
200	181, 182, 188, 192, 195, 199	dvferm2 25959	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → 0 ≤ ((ℝ D 𝐺)‘𝑥))
201	106	adantr 480	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ((ℝ D 𝐺)‘𝑥) = (((ℝ D 𝐹)‘𝑥) − 𝐶))
202	200, 201	breqtrd 5126	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → 0 ≤ (((ℝ D 𝐹)‘𝑥) − 𝐶))
203	94	adantr 480	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ((ℝ D 𝐹)‘𝑥) ∈ ℝ)
204	22	ad2antrr 727	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → 𝐶 ∈ ℝ)
205	203, 204	subge0d 11739	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → (0 ≤ (((ℝ D 𝐹)‘𝑥) − 𝐶) ↔ 𝐶 ≤ ((ℝ D 𝐹)‘𝑥)))
206	202, 205	mpbid 232	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → 𝐶 ≤ ((ℝ D 𝐹)‘𝑥))
207	203, 204	letri3d 11287	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → (((ℝ D 𝐹)‘𝑥) = 𝐶 ↔ (((ℝ D 𝐹)‘𝑥) ≤ 𝐶 ∧ 𝐶 ≤ ((ℝ D 𝐹)‘𝑥))))
208	180, 206, 207	mpbir2and 714	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) ∧ (𝑥 = 𝑁 ∧ ∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥))) → ((ℝ D 𝐹)‘𝑥) = 𝐶)
209	208	exp32 420	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) → (𝑥 = 𝑁 → (∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥) → ((ℝ D 𝐹)‘𝑥) = 𝐶)))
210	175, 209	jaod 860	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) → ((𝑥 = 𝑀 ∨ 𝑥 = 𝑁) → (∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥) → ((ℝ D 𝐹)‘𝑥) = 𝐶)))
211	126, 210	biimtrid 242	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) → (𝑥 ∈ {𝑀, 𝑁} → (∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥) → ((ℝ D 𝐹)‘𝑥) = 𝐶)))
212		elun 4107	. . . . . . 7 ⊢ (𝑥 ∈ ((𝑀(,)𝑁) ∪ {𝑀, 𝑁}) ↔ (𝑥 ∈ (𝑀(,)𝑁) ∨ 𝑥 ∈ {𝑀, 𝑁}))
213		prunioo 13409	. . . . . . . . 9 ⊢ ((𝑀 ∈ ℝ^* ∧ 𝑁 ∈ ℝ^* ∧ 𝑀 ≤ 𝑁) → ((𝑀(,)𝑁) ∪ {𝑀, 𝑁}) = (𝑀[,]𝑁))
214	183, 139, 7, 213	syl3anc 1374	. . . . . . . 8 ⊢ (𝜑 → ((𝑀(,)𝑁) ∪ {𝑀, 𝑁}) = (𝑀[,]𝑁))
215	214	eleq2d 2823	. . . . . . 7 ⊢ (𝜑 → (𝑥 ∈ ((𝑀(,)𝑁) ∪ {𝑀, 𝑁}) ↔ 𝑥 ∈ (𝑀[,]𝑁)))
216	212, 215	bitr3id 285	. . . . . 6 ⊢ (𝜑 → ((𝑥 ∈ (𝑀(,)𝑁) ∨ 𝑥 ∈ {𝑀, 𝑁}) ↔ 𝑥 ∈ (𝑀[,]𝑁)))
217	216	biimpar 477	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) → (𝑥 ∈ (𝑀(,)𝑁) ∨ 𝑥 ∈ {𝑀, 𝑁}))
218	124, 211, 217	mpjaod 861	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) → (∀𝑧 ∈ (𝑀(,)𝑁)(𝐺‘𝑧) ≤ (𝐺‘𝑥) → ((ℝ D 𝐹)‘𝑥) = 𝐶))
219	91, 218	syld 47	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝑀[,]𝑁)) → (∀𝑧 ∈ (𝑀[,]𝑁)((𝐺 ↾ (𝑀[,]𝑁))‘𝑧) ≤ ((𝐺 ↾ (𝑀[,]𝑁))‘𝑥) → ((ℝ D 𝐹)‘𝑥) = 𝐶))
220	219	reximdva 3151	. 2 ⊢ (𝜑 → (∃𝑥 ∈ (𝑀[,]𝑁)∀𝑧 ∈ (𝑀[,]𝑁)((𝐺 ↾ (𝑀[,]𝑁))‘𝑧) ≤ ((𝐺 ↾ (𝑀[,]𝑁))‘𝑥) → ∃𝑥 ∈ (𝑀[,]𝑁)((ℝ D 𝐹)‘𝑥) = 𝐶))
221	82, 220	mpd 15	1 ⊢ (𝜑 → ∃𝑥 ∈ (𝑀[,]𝑁)((ℝ D 𝐹)‘𝑥) = 𝐶)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∨ wo 848 ∧ w3a 1087 = wceq 1542 ∈ wcel 2114 ≠ wne 2933 ∀wral 3052 ∃wrex 3062 Vcvv 3442 ∪ cun 3901 ⊆ wss 3903 ∅c0 4287 {cpr 4584 class class class wbr 5100 ↦ cmpt 5181 dom cdm 5632 ran crn 5633 ↾ cres 5634 ⟶wf 6496 ‘cfv 6500 (class class class)co 7368 ℂcc 11036 ℝcr 11037 0cc0 11038 1c1 11039 · cmul 11043 ℝ^*cxr 11177 < clt 11178 ≤ cle 11179 − cmin 11376 (,)cioo 13273 [,]cicc 13276 TopOpenctopn 17353 topGenctg 17369 ℂ_fldccnfld 21321 –cn→ccncf 24837 D cdv 25832

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5226 ax-sep 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 ax-pre-sup 11116 ax-addf 11117

This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3352 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-tp 4587 df-op 4589 df-uni 4866 df-int 4905 df-iun 4950 df-iin 4951 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5527 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-se 5586 df-we 5587 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-pred 6267 df-ord 6328 df-on 6329 df-lim 6330 df-suc 6331 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-isom 6509 df-riota 7325 df-ov 7371 df-oprab 7372 df-mpo 7373 df-of 7632 df-om 7819 df-1st 7943 df-2nd 7944 df-supp 8113 df-frecs 8233 df-wrecs 8264 df-recs 8313 df-rdg 8351 df-1o 8407 df-2o 8408 df-er 8645 df-map 8777 df-pm 8778 df-ixp 8848 df-en 8896 df-dom 8897 df-sdom 8898 df-fin 8899 df-fsupp 9277 df-fi 9326 df-sup 9357 df-inf 9358 df-oi 9427 df-card 9863 df-pnf 11180 df-mnf 11181 df-xr 11182 df-ltxr 11183 df-le 11184 df-sub 11378 df-neg 11379 df-div 11807 df-nn 12158 df-2 12220 df-3 12221 df-4 12222 df-5 12223 df-6 12224 df-7 12225 df-8 12226 df-9 12227 df-n0 12414 df-z 12501 df-dec 12620 df-uz 12764 df-q 12874 df-rp 12918 df-xneg 13038 df-xadd 13039 df-xmul 13040 df-ioo 13277 df-ico 13279 df-icc 13280 df-fz 13436 df-fzo 13583 df-seq 13937 df-exp 13997 df-hash 14266 df-cj 15034 df-re 15035 df-im 15036 df-sqrt 15170 df-abs 15171 df-struct 17086 df-sets 17103 df-slot 17121 df-ndx 17133 df-base 17149 df-ress 17170 df-plusg 17202 df-mulr 17203 df-starv 17204 df-sca 17205 df-vsca 17206 df-ip 17207 df-tset 17208 df-ple 17209 df-ds 17211 df-unif 17212 df-hom 17213 df-cco 17214 df-rest 17354 df-topn 17355 df-0g 17373 df-gsum 17374 df-topgen 17375 df-pt 17376 df-prds 17379 df-xrs 17435 df-qtop 17440 df-imas 17441 df-xps 17443 df-mre 17517 df-mrc 17518 df-acs 17520 df-mgm 18577 df-sgrp 18656 df-mnd 18672 df-submnd 18721 df-mulg 19010 df-cntz 19258 df-cmn 19723 df-psmet 21313 df-xmet 21314 df-met 21315 df-bl 21316 df-mopn 21317 df-fbas 21318 df-fg 21319 df-cnfld 21322 df-top 22850 df-topon 22867 df-topsp 22889 df-bases 22902 df-cld 22975 df-ntr 22976 df-cls 22977 df-nei 23054 df-lp 23092 df-perf 23093 df-cn 23183 df-cnp 23184 df-haus 23271 df-cmp 23343 df-tx 23518 df-hmeo 23711 df-fil 23802 df-fm 23894 df-flim 23895 df-flf 23896 df-xms 24276 df-ms 24277 df-tms 24278 df-cncf 24839 df-limc 25835 df-dv 25836

This theorem is referenced by: dvivthlem2 25982

W3C validator