unbdqndv2 - Mathbox for Asger C. Ipsen

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Theorem unbdqndv2 36043

Description: Variant of unbdqndv1 36040 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 2725	. . 3 ⊢ (𝑧 ∈ (𝑋 ∖ {𝐴}) ↦ (((𝐹‘𝑧) − (𝐹‘𝐴)) / (𝑧 − 𝐴))) = (𝑧 ∈ (𝑋 ∖ {𝐴}) ↦ (((𝐹‘𝑧) − (𝐹‘𝐴)) / (𝑧 − 𝐴)))
2		ax-resscn 11195	. . . 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 479	. . 3 ⊢ ((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) → 𝑋 ⊆ ℝ)
6		unbdqndv2.f	. . . 4 ⊢ (𝜑 → 𝐹:𝑋⟶ℂ)
7	6	adantr 479	. . 3 ⊢ ((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) → 𝐹:𝑋⟶ℂ)
8		breq1 5146	. . . . . . . . . . 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 3169	. . . . . . . . 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 3169	. . . . . . . 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 3168	. . . . . . 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 724	. . . . . . 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 13011	. . . . . . . . 9 ⊢ 2 ∈ ℝ⁺
16	15	a1i 11	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) → 2 ∈ ℝ⁺)
17		simprl 769	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) → 𝑐 ∈ ℝ⁺)
18	16, 17	rpmulcld 13064	. . . . . . 7 ⊢ (((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) → (2 · 𝑐) ∈ ℝ⁺)
19	12, 14, 18	rspcdva 3602	. . . . . 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 771	. . . . . 6 ⊢ (((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) → 𝑑 ∈ ℝ⁺)
21		rsp 3235	. . . . . 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 2725	. . . . . . . . . 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 728	. . . . . . . . . 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 728	. . . . . . . . . 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 25848	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) → dom (ℝ D 𝐹) ⊆ 𝑋)
27		simpr 483	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) → 𝐴 ∈ dom (ℝ D 𝐹))
28	26, 27	sseldd 3973	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) → 𝐴 ∈ 𝑋)
29	28	adantr 479	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) → 𝐴 ∈ 𝑋)
30	29	adantr 479	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) → 𝐴 ∈ 𝑋)
31	30	adantr 479	. . . . . . . . . 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 724	. . . . . . . . . 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 724	. . . . . . . . . 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 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)))) → 𝑥 ∈ 𝑋)
35		simplrr 776	. . . . . . . . . 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 36042	. . . . . . . . 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 493	. . . . . . . 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 7439	. . . . . . . . . . 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 5153	. . . . . . . . . 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 6897	. . . . . . . . . . 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 5155	. . . . . . . . . 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 480	. . . . . . . 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 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)))) → ((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 3603	. . . . . . 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 411	. . . . . 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 3202	. . . . 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 3191	. . 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 36040	. 2 ⊢ ((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) → ¬ 𝐴 ∈ dom (ℝ D 𝐹))
56	55	pm2.01da 797	1 ⊢ (𝜑 → ¬ 𝐴 ∈ dom (ℝ D 𝐹))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 394 ∧ w3a 1084 = wceq 1533 ∈ wcel 2098 ≠ wne 2930 ∀wral 3051 ∃wrex 3060 ∖ cdif 3936 ⊆ wss 3939 ifcif 4524 {csn 4624 class class class wbr 5143 ↦ cmpt 5226 dom cdm 5672 ⟶wf 6539 ‘cfv 6543 (class class class)co 7416 ℂcc 11136 ℝcr 11137 · cmul 11143 < clt 11278 ≤ cle 11279 − cmin 11474 / cdiv 11901 2c2 12297 ℝ⁺crp 13006 abscabs 15213 D cdv 25810

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 2166 ax-ext 2696 ax-rep 5280 ax-sep 5294 ax-nul 5301 ax-pow 5359 ax-pr 5423 ax-un 7738 ax-cnex 11194 ax-resscn 11195 ax-1cn 11196 ax-icn 11197 ax-addcl 11198 ax-addrcl 11199 ax-mulcl 11200 ax-mulrcl 11201 ax-mulcom 11202 ax-addass 11203 ax-mulass 11204 ax-distr 11205 ax-i2m1 11206 ax-1ne0 11207 ax-1rid 11208 ax-rnegex 11209 ax-rrecex 11210 ax-cnre 11211 ax-pre-lttri 11212 ax-pre-lttrn 11213 ax-pre-ltadd 11214 ax-pre-mulgt0 11215 ax-pre-sup 11216

This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 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 2703 df-cleq 2717 df-clel 2802 df-nfc 2877 df-ne 2931 df-nel 3037 df-ral 3052 df-rex 3061 df-rmo 3364 df-reu 3365 df-rab 3420 df-v 3465 df-sbc 3769 df-csb 3885 df-dif 3942 df-un 3944 df-in 3946 df-ss 3956 df-pss 3959 df-nul 4319 df-if 4525 df-pw 4600 df-sn 4625 df-pr 4627 df-tp 4629 df-op 4631 df-uni 4904 df-int 4945 df-iun 4993 df-br 5144 df-opab 5206 df-mpt 5227 df-tr 5261 df-id 5570 df-eprel 5576 df-po 5584 df-so 5585 df-fr 5627 df-we 5629 df-xp 5678 df-rel 5679 df-cnv 5680 df-co 5681 df-dm 5682 df-rn 5683 df-res 5684 df-ima 5685 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7372 df-ov 7419 df-oprab 7420 df-mpo 7421 df-om 7869 df-1st 7991 df-2nd 7992 df-frecs 8285 df-wrecs 8316 df-recs 8390 df-rdg 8429 df-1o 8485 df-er 8723 df-map 8845 df-pm 8846 df-en 8963 df-dom 8964 df-sdom 8965 df-fin 8966 df-fi 9434 df-sup 9465 df-inf 9466 df-pnf 11280 df-mnf 11281 df-xr 11282 df-ltxr 11283 df-le 11284 df-sub 11476 df-neg 11477 df-div 11902 df-nn 12243 df-2 12305 df-3 12306 df-4 12307 df-5 12308 df-6 12309 df-7 12310 df-8 12311 df-9 12312 df-n0 12503 df-z 12589 df-dec 12708 df-uz 12853 df-q 12963 df-rp 13007 df-xneg 13124 df-xadd 13125 df-xmul 13126 df-fz 13517 df-seq 13999 df-exp 14059 df-cj 15078 df-re 15079 df-im 15080 df-sqrt 15214 df-abs 15215 df-struct 17115 df-slot 17150 df-ndx 17162 df-base 17180 df-plusg 17245 df-mulr 17246 df-starv 17247 df-tset 17251 df-ple 17252 df-ds 17254 df-unif 17255 df-rest 17403 df-topn 17404 df-topgen 17424 df-psmet 21275 df-xmet 21276 df-met 21277 df-bl 21278 df-mopn 21279 df-cnfld 21284 df-top 22814 df-topon 22831 df-topsp 22853 df-bases 22867 df-ntr 22942 df-cnp 23150 df-xms 24244 df-ms 24245 df-limc 25813 df-dv 25814

This theorem is referenced by: knoppndv 36066

W3C validator