unbdqndv2 - Mathbox for Asger C. Ipsen

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Theorem unbdqndv2 35895

Description: Variant of unbdqndv1 35892 with the hypothesis that (((𝐹‘𝑦) − (𝐹‘𝑥)) / (𝑦 − 𝑥)) is unbounded where 𝑥 ≤ 𝐴 and 𝐴 ≤ 𝑦. (Contributed by Asger C. Ipsen, 12-May-2021.)

**Hypotheses**
Ref	Expression
unbdqndv2.x	⊢ (𝜑 → 𝑋 ⊆ ℝ)
unbdqndv2.f	⊢ (𝜑 → 𝐹:𝑋⟶ℂ)
unbdqndv2.1	⊢ (𝜑 → ∀𝑏 ∈ ℝ⁺ ∀𝑑 ∈ ℝ⁺ ∃𝑥 ∈ 𝑋 ∃𝑦 ∈ 𝑋 ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ 𝑏 ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥))))

**Assertion**
Ref	Expression
unbdqndv2	⊢ (𝜑 → ¬ 𝐴 ∈ dom (ℝ D 𝐹))

Distinct variable groups: 𝐴,𝑏,𝑑,𝑥,𝑦 𝐹,𝑏,𝑑,𝑥,𝑦 𝑋,𝑏,𝑑,𝑥,𝑦 𝜑,𝑏,𝑑,𝑥,𝑦

Proof of Theorem unbdqndv2 Dummy variables 𝑐 𝑤 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		eqid 2726	. . 3 ⊢ (𝑧 ∈ (𝑋 ∖ {𝐴}) ↦ (((𝐹‘𝑧) − (𝐹‘𝐴)) / (𝑧 − 𝐴))) = (𝑧 ∈ (𝑋 ∖ {𝐴}) ↦ (((𝐹‘𝑧) − (𝐹‘𝐴)) / (𝑧 − 𝐴)))
2		ax-resscn 11169	. . . 4 ⊢ ℝ ⊆ ℂ
3	2	a1i 11	. . 3 ⊢ ((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) → ℝ ⊆ ℂ)
4		unbdqndv2.x	. . . 4 ⊢ (𝜑 → 𝑋 ⊆ ℝ)
5	4	adantr 480	. . 3 ⊢ ((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) → 𝑋 ⊆ ℝ)
6		unbdqndv2.f	. . . 4 ⊢ (𝜑 → 𝐹:𝑋⟶ℂ)
7	6	adantr 480	. . 3 ⊢ ((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) → 𝐹:𝑋⟶ℂ)
8		breq1 5144	. . . . . . . . . . 11 ⊢ (𝑏 = (2 · 𝑐) → (𝑏 ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)) ↔ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥))))
9	8	3anbi3d 1438	. . . . . . . . . 10 ⊢ (𝑏 = (2 · 𝑐) → (((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ 𝑏 ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥))) ↔ ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)))))
10	9	rexbidv 3172	. . . . . . . . 9 ⊢ (𝑏 = (2 · 𝑐) → (∃𝑦 ∈ 𝑋 ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ 𝑏 ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥))) ↔ ∃𝑦 ∈ 𝑋 ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)))))
11	10	rexbidv 3172	. . . . . . . 8 ⊢ (𝑏 = (2 · 𝑐) → (∃𝑥 ∈ 𝑋 ∃𝑦 ∈ 𝑋 ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ 𝑏 ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥))) ↔ ∃𝑥 ∈ 𝑋 ∃𝑦 ∈ 𝑋 ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)))))
12	11	ralbidv 3171	. . . . . . 7 ⊢ (𝑏 = (2 · 𝑐) → (∀𝑑 ∈ ℝ⁺ ∃𝑥 ∈ 𝑋 ∃𝑦 ∈ 𝑋 ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ 𝑏 ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥))) ↔ ∀𝑑 ∈ ℝ⁺ ∃𝑥 ∈ 𝑋 ∃𝑦 ∈ 𝑋 ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)))))
13		unbdqndv2.1	. . . . . . . 8 ⊢ (𝜑 → ∀𝑏 ∈ ℝ⁺ ∀𝑑 ∈ ℝ⁺ ∃𝑥 ∈ 𝑋 ∃𝑦 ∈ 𝑋 ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ 𝑏 ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥))))
14	13	ad2antrr 723	. . . . . . 7 ⊢ (((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) → ∀𝑏 ∈ ℝ⁺ ∀𝑑 ∈ ℝ⁺ ∃𝑥 ∈ 𝑋 ∃𝑦 ∈ 𝑋 ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ 𝑏 ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥))))
15		2rp 12985	. . . . . . . . 9 ⊢ 2 ∈ ℝ⁺
16	15	a1i 11	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) → 2 ∈ ℝ⁺)
17		simprl 768	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) → 𝑐 ∈ ℝ⁺)
18	16, 17	rpmulcld 13038	. . . . . . 7 ⊢ (((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) → (2 · 𝑐) ∈ ℝ⁺)
19	12, 14, 18	rspcdva 3607	. . . . . 6 ⊢ (((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) → ∀𝑑 ∈ ℝ⁺ ∃𝑥 ∈ 𝑋 ∃𝑦 ∈ 𝑋 ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥))))
20		simprr 770	. . . . . 6 ⊢ (((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) → 𝑑 ∈ ℝ⁺)
21		rsp 3238	. . . . . 6 ⊢ (∀𝑑 ∈ ℝ⁺ ∃𝑥 ∈ 𝑋 ∃𝑦 ∈ 𝑋 ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥))) → (𝑑 ∈ ℝ⁺ → ∃𝑥 ∈ 𝑋 ∃𝑦 ∈ 𝑋 ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)))))
22	19, 20, 21	sylc 65	. . . . 5 ⊢ (((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) → ∃𝑥 ∈ 𝑋 ∃𝑦 ∈ 𝑋 ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥))))
23		eqid 2726	. . . . . . . . . 10 ⊢ if((𝑐 · (𝑦 − 𝑥)) ≤ (abs‘((𝐹‘𝑥) − (𝐹‘𝐴))), 𝑥, 𝑦) = if((𝑐 · (𝑦 − 𝑥)) ≤ (abs‘((𝐹‘𝑥) − (𝐹‘𝐴))), 𝑥, 𝑦)
24	5	ad3antrrr 727	. . . . . . . . . 10 ⊢ (((((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)))) → 𝑋 ⊆ ℝ)
25	7	ad3antrrr 727	. . . . . . . . . 10 ⊢ (((((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)))) → 𝐹:𝑋⟶ℂ)
26	3, 7, 5	dvbss 25785	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) → dom (ℝ D 𝐹) ⊆ 𝑋)
27		simpr 484	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) → 𝐴 ∈ dom (ℝ D 𝐹))
28	26, 27	sseldd 3978	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) → 𝐴 ∈ 𝑋)
29	28	adantr 480	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) → 𝐴 ∈ 𝑋)
30	29	adantr 480	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) → 𝐴 ∈ 𝑋)
31	30	adantr 480	. . . . . . . . . 10 ⊢ (((((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)))) → 𝐴 ∈ 𝑋)
32	17	ad2antrr 723	. . . . . . . . . 10 ⊢ (((((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)))) → 𝑐 ∈ ℝ⁺)
33	20	ad2antrr 723	. . . . . . . . . 10 ⊢ (((((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)))) → 𝑑 ∈ ℝ⁺)
34		simplrl 774	. . . . . . . . . 10 ⊢ (((((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)))) → 𝑥 ∈ 𝑋)
35		simplrr 775	. . . . . . . . . 10 ⊢ (((((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)))) → 𝑦 ∈ 𝑋)
36		simpr2r 1230	. . . . . . . . . 10 ⊢ (((((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)))) → 𝑥 ≠ 𝑦)
37		simpr1l 1227	. . . . . . . . . 10 ⊢ (((((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)))) → 𝑥 ≤ 𝐴)
38		simpr1r 1228	. . . . . . . . . 10 ⊢ (((((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)))) → 𝐴 ≤ 𝑦)
39		simpr2l 1229	. . . . . . . . . 10 ⊢ (((((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)))) → (𝑦 − 𝑥) < 𝑑)
40		simpr3 1193	. . . . . . . . . 10 ⊢ (((((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)))) → (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)))
41	1, 23, 24, 25, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40	unbdqndv2lem2 35894	. . . . . . . . 9 ⊢ (((((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)))) → (if((𝑐 · (𝑦 − 𝑥)) ≤ (abs‘((𝐹‘𝑥) − (𝐹‘𝐴))), 𝑥, 𝑦) ∈ (𝑋 ∖ {𝐴}) ∧ ((abs‘(if((𝑐 · (𝑦 − 𝑥)) ≤ (abs‘((𝐹‘𝑥) − (𝐹‘𝐴))), 𝑥, 𝑦) − 𝐴)) < 𝑑 ∧ 𝑐 ≤ (abs‘((𝑧 ∈ (𝑋 ∖ {𝐴}) ↦ (((𝐹‘𝑧) − (𝐹‘𝐴)) / (𝑧 − 𝐴)))‘if((𝑐 · (𝑦 − 𝑥)) ≤ (abs‘((𝐹‘𝑥) − (𝐹‘𝐴))), 𝑥, 𝑦))))))
42	41	simpld 494	. . . . . . . 8 ⊢ (((((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)))) → if((𝑐 · (𝑦 − 𝑥)) ≤ (abs‘((𝐹‘𝑥) − (𝐹‘𝐴))), 𝑥, 𝑦) ∈ (𝑋 ∖ {𝐴}))
43		fvoveq1 7428	. . . . . . . . . . 11 ⊢ (𝑤 = if((𝑐 · (𝑦 − 𝑥)) ≤ (abs‘((𝐹‘𝑥) − (𝐹‘𝐴))), 𝑥, 𝑦) → (abs‘(𝑤 − 𝐴)) = (abs‘(if((𝑐 · (𝑦 − 𝑥)) ≤ (abs‘((𝐹‘𝑥) − (𝐹‘𝐴))), 𝑥, 𝑦) − 𝐴)))
44	43	breq1d 5151	. . . . . . . . . 10 ⊢ (𝑤 = if((𝑐 · (𝑦 − 𝑥)) ≤ (abs‘((𝐹‘𝑥) − (𝐹‘𝐴))), 𝑥, 𝑦) → ((abs‘(𝑤 − 𝐴)) < 𝑑 ↔ (abs‘(if((𝑐 · (𝑦 − 𝑥)) ≤ (abs‘((𝐹‘𝑥) − (𝐹‘𝐴))), 𝑥, 𝑦) − 𝐴)) < 𝑑))
45		2fveq3 6890	. . . . . . . . . . 11 ⊢ (𝑤 = if((𝑐 · (𝑦 − 𝑥)) ≤ (abs‘((𝐹‘𝑥) − (𝐹‘𝐴))), 𝑥, 𝑦) → (abs‘((𝑧 ∈ (𝑋 ∖ {𝐴}) ↦ (((𝐹‘𝑧) − (𝐹‘𝐴)) / (𝑧 − 𝐴)))‘𝑤)) = (abs‘((𝑧 ∈ (𝑋 ∖ {𝐴}) ↦ (((𝐹‘𝑧) − (𝐹‘𝐴)) / (𝑧 − 𝐴)))‘if((𝑐 · (𝑦 − 𝑥)) ≤ (abs‘((𝐹‘𝑥) − (𝐹‘𝐴))), 𝑥, 𝑦))))
46	45	breq2d 5153	. . . . . . . . . 10 ⊢ (𝑤 = if((𝑐 · (𝑦 − 𝑥)) ≤ (abs‘((𝐹‘𝑥) − (𝐹‘𝐴))), 𝑥, 𝑦) → (𝑐 ≤ (abs‘((𝑧 ∈ (𝑋 ∖ {𝐴}) ↦ (((𝐹‘𝑧) − (𝐹‘𝐴)) / (𝑧 − 𝐴)))‘𝑤)) ↔ 𝑐 ≤ (abs‘((𝑧 ∈ (𝑋 ∖ {𝐴}) ↦ (((𝐹‘𝑧) − (𝐹‘𝐴)) / (𝑧 − 𝐴)))‘if((𝑐 · (𝑦 − 𝑥)) ≤ (abs‘((𝐹‘𝑥) − (𝐹‘𝐴))), 𝑥, 𝑦)))))
47	44, 46	anbi12d 630	. . . . . . . . 9 ⊢ (𝑤 = if((𝑐 · (𝑦 − 𝑥)) ≤ (abs‘((𝐹‘𝑥) − (𝐹‘𝐴))), 𝑥, 𝑦) → (((abs‘(𝑤 − 𝐴)) < 𝑑 ∧ 𝑐 ≤ (abs‘((𝑧 ∈ (𝑋 ∖ {𝐴}) ↦ (((𝐹‘𝑧) − (𝐹‘𝐴)) / (𝑧 − 𝐴)))‘𝑤))) ↔ ((abs‘(if((𝑐 · (𝑦 − 𝑥)) ≤ (abs‘((𝐹‘𝑥) − (𝐹‘𝐴))), 𝑥, 𝑦) − 𝐴)) < 𝑑 ∧ 𝑐 ≤ (abs‘((𝑧 ∈ (𝑋 ∖ {𝐴}) ↦ (((𝐹‘𝑧) − (𝐹‘𝐴)) / (𝑧 − 𝐴)))‘if((𝑐 · (𝑦 − 𝑥)) ≤ (abs‘((𝐹‘𝑥) − (𝐹‘𝐴))), 𝑥, 𝑦))))))
48	47	adantl 481	. . . . . . . 8 ⊢ ((((((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)))) ∧ 𝑤 = if((𝑐 · (𝑦 − 𝑥)) ≤ (abs‘((𝐹‘𝑥) − (𝐹‘𝐴))), 𝑥, 𝑦)) → (((abs‘(𝑤 − 𝐴)) < 𝑑 ∧ 𝑐 ≤ (abs‘((𝑧 ∈ (𝑋 ∖ {𝐴}) ↦ (((𝐹‘𝑧) − (𝐹‘𝐴)) / (𝑧 − 𝐴)))‘𝑤))) ↔ ((abs‘(if((𝑐 · (𝑦 − 𝑥)) ≤ (abs‘((𝐹‘𝑥) − (𝐹‘𝐴))), 𝑥, 𝑦) − 𝐴)) < 𝑑 ∧ 𝑐 ≤ (abs‘((𝑧 ∈ (𝑋 ∖ {𝐴}) ↦ (((𝐹‘𝑧) − (𝐹‘𝐴)) / (𝑧 − 𝐴)))‘if((𝑐 · (𝑦 − 𝑥)) ≤ (abs‘((𝐹‘𝑥) − (𝐹‘𝐴))), 𝑥, 𝑦))))))
49	41	simprd 495	. . . . . . . 8 ⊢ (((((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)))) → ((abs‘(if((𝑐 · (𝑦 − 𝑥)) ≤ (abs‘((𝐹‘𝑥) − (𝐹‘𝐴))), 𝑥, 𝑦) − 𝐴)) < 𝑑 ∧ 𝑐 ≤ (abs‘((𝑧 ∈ (𝑋 ∖ {𝐴}) ↦ (((𝐹‘𝑧) − (𝐹‘𝐴)) / (𝑧 − 𝐴)))‘if((𝑐 · (𝑦 − 𝑥)) ≤ (abs‘((𝐹‘𝑥) − (𝐹‘𝐴))), 𝑥, 𝑦)))))
50	42, 48, 49	rspcedvd 3608	. . . . . . 7 ⊢ (((((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)))) → ∃𝑤 ∈ (𝑋 ∖ {𝐴})((abs‘(𝑤 − 𝐴)) < 𝑑 ∧ 𝑐 ≤ (abs‘((𝑧 ∈ (𝑋 ∖ {𝐴}) ↦ (((𝐹‘𝑧) − (𝐹‘𝐴)) / (𝑧 − 𝐴)))‘𝑤))))
51	50	ex 412	. . . . . 6 ⊢ ((((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) → (((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥))) → ∃𝑤 ∈ (𝑋 ∖ {𝐴})((abs‘(𝑤 − 𝐴)) < 𝑑 ∧ 𝑐 ≤ (abs‘((𝑧 ∈ (𝑋 ∖ {𝐴}) ↦ (((𝐹‘𝑧) − (𝐹‘𝐴)) / (𝑧 − 𝐴)))‘𝑤)))))
52	51	rexlimdvva 3205	. . . . 5 ⊢ (((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) → (∃𝑥 ∈ 𝑋 ∃𝑦 ∈ 𝑋 ((𝑥 ≤ 𝐴 ∧ 𝐴 ≤ 𝑦) ∧ ((𝑦 − 𝑥) < 𝑑 ∧ 𝑥 ≠ 𝑦) ∧ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥))) → ∃𝑤 ∈ (𝑋 ∖ {𝐴})((abs‘(𝑤 − 𝐴)) < 𝑑 ∧ 𝑐 ≤ (abs‘((𝑧 ∈ (𝑋 ∖ {𝐴}) ↦ (((𝐹‘𝑧) − (𝐹‘𝐴)) / (𝑧 − 𝐴)))‘𝑤)))))
53	22, 52	mpd 15	. . . 4 ⊢ (((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) → ∃𝑤 ∈ (𝑋 ∖ {𝐴})((abs‘(𝑤 − 𝐴)) < 𝑑 ∧ 𝑐 ≤ (abs‘((𝑧 ∈ (𝑋 ∖ {𝐴}) ↦ (((𝐹‘𝑧) − (𝐹‘𝐴)) / (𝑧 − 𝐴)))‘𝑤))))
54	53	ralrimivva 3194	. . 3 ⊢ ((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) → ∀𝑐 ∈ ℝ⁺ ∀𝑑 ∈ ℝ⁺ ∃𝑤 ∈ (𝑋 ∖ {𝐴})((abs‘(𝑤 − 𝐴)) < 𝑑 ∧ 𝑐 ≤ (abs‘((𝑧 ∈ (𝑋 ∖ {𝐴}) ↦ (((𝐹‘𝑧) − (𝐹‘𝐴)) / (𝑧 − 𝐴)))‘𝑤))))
55	1, 3, 5, 7, 54	unbdqndv1 35892	. 2 ⊢ ((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) → ¬ 𝐴 ∈ dom (ℝ D 𝐹))
56	55	pm2.01da 796	1 ⊢ (𝜑 → ¬ 𝐴 ∈ dom (ℝ D 𝐹))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 395 ∧ w3a 1084 = wceq 1533 ∈ wcel 2098 ≠ wne 2934 ∀wral 3055 ∃wrex 3064 ∖ cdif 3940 ⊆ wss 3943 ifcif 4523 {csn 4623 class class class wbr 5141 ↦ cmpt 5224 dom cdm 5669 ⟶wf 6533 ‘cfv 6537 (class class class)co 7405 ℂcc 11110 ℝcr 11111 · cmul 11117 < clt 11252 ≤ cle 11253 − cmin 11448 / cdiv 11875 2c2 12271 ℝ⁺crp 12980 abscabs 15187 D cdv 25747

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2697 ax-rep 5278 ax-sep 5292 ax-nul 5299 ax-pow 5356 ax-pr 5420 ax-un 7722 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189 ax-pre-sup 11190

This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2704 df-cleq 2718 df-clel 2804 df-nfc 2879 df-ne 2935 df-nel 3041 df-ral 3056 df-rex 3065 df-rmo 3370 df-reu 3371 df-rab 3427 df-v 3470 df-sbc 3773 df-csb 3889 df-dif 3946 df-un 3948 df-in 3950 df-ss 3960 df-pss 3962 df-nul 4318 df-if 4524 df-pw 4599 df-sn 4624 df-pr 4626 df-tp 4628 df-op 4630 df-uni 4903 df-int 4944 df-iun 4992 df-br 5142 df-opab 5204 df-mpt 5225 df-tr 5259 df-id 5567 df-eprel 5573 df-po 5581 df-so 5582 df-fr 5624 df-we 5626 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-rn 5680 df-res 5681 df-ima 5682 df-pred 6294 df-ord 6361 df-on 6362 df-lim 6363 df-suc 6364 df-iota 6489 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7853 df-1st 7974 df-2nd 7975 df-frecs 8267 df-wrecs 8298 df-recs 8372 df-rdg 8411 df-1o 8467 df-er 8705 df-map 8824 df-pm 8825 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-fi 9408 df-sup 9439 df-inf 9440 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-div 11876 df-nn 12217 df-2 12279 df-3 12280 df-4 12281 df-5 12282 df-6 12283 df-7 12284 df-8 12285 df-9 12286 df-n0 12477 df-z 12563 df-dec 12682 df-uz 12827 df-q 12937 df-rp 12981 df-xneg 13098 df-xadd 13099 df-xmul 13100 df-fz 13491 df-seq 13973 df-exp 14033 df-cj 15052 df-re 15053 df-im 15054 df-sqrt 15188 df-abs 15189 df-struct 17089 df-slot 17124 df-ndx 17136 df-base 17154 df-plusg 17219 df-mulr 17220 df-starv 17221 df-tset 17225 df-ple 17226 df-ds 17228 df-unif 17229 df-rest 17377 df-topn 17378 df-topgen 17398 df-psmet 21232 df-xmet 21233 df-met 21234 df-bl 21235 df-mopn 21236 df-cnfld 21241 df-top 22751 df-topon 22768 df-topsp 22790 df-bases 22804 df-ntr 22879 df-cnp 23087 df-xms 24181 df-ms 24182 df-limc 25750 df-dv 25751

This theorem is referenced by: knoppndv 35918

W3C validator