unbdqndv2 - Mathbox for Asger C. Ipsen

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Theorem unbdqndv2 35382

Description: Variant of unbdqndv1 35379 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 2732	. . 3 ⊢ (𝑧 ∈ (𝑋 ∖ {𝐴}) ↦ (((𝐹‘𝑧) − (𝐹‘𝐴)) / (𝑧 − 𝐴))) = (𝑧 ∈ (𝑋 ∖ {𝐴}) ↦ (((𝐹‘𝑧) − (𝐹‘𝐴)) / (𝑧 − 𝐴)))
2		ax-resscn 11166	. . . 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 481	. . 3 ⊢ ((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) → 𝑋 ⊆ ℝ)
6		unbdqndv2.f	. . . 4 ⊢ (𝜑 → 𝐹:𝑋⟶ℂ)
7	6	adantr 481	. . 3 ⊢ ((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) → 𝐹:𝑋⟶ℂ)
8		breq1 5151	. . . . . . . . . . 11 ⊢ (𝑏 = (2 · 𝑐) → (𝑏 ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥)) ↔ (2 · 𝑐) ≤ ((abs‘((𝐹‘𝑦) − (𝐹‘𝑥))) / (𝑦 − 𝑥))))
9	8	3anbi3d 1442	. . . . . . . . . 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 3178	. . . . . . . . 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 3178	. . . . . . . 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 3177	. . . . . . 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 12978	. . . . . . . . 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 13031	. . . . . . 7 ⊢ (((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) → (2 · 𝑐) ∈ ℝ⁺)
19	12, 14, 18	rspcdva 3613	. . . . . 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 3244	. . . . . 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 2732	. . . . . . . . . 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 25417	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) → dom (ℝ D 𝐹) ⊆ 𝑋)
27		simpr 485	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) → 𝐴 ∈ dom (ℝ D 𝐹))
28	26, 27	sseldd 3983	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) → 𝐴 ∈ 𝑋)
29	28	adantr 481	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) → 𝐴 ∈ 𝑋)
30	29	adantr 481	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝐴 ∈ dom (ℝ D 𝐹)) ∧ (𝑐 ∈ ℝ⁺ ∧ 𝑑 ∈ ℝ⁺)) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) → 𝐴 ∈ 𝑋)
31	30	adantr 481	. . . . . . . . . 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 1233	. . . . . . . . . 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 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 ≤ 𝐴)
38		simpr1r 1231	. . . . . . . . . 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 1232	. . . . . . . . . 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 1196	. . . . . . . . . 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 35381	. . . . . . . . 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 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)))) → if((𝑐 · (𝑦 − 𝑥)) ≤ (abs‘((𝐹‘𝑥) − (𝐹‘𝐴))), 𝑥, 𝑦) ∈ (𝑋 ∖ {𝐴}))
43		fvoveq1 7431	. . . . . . . . . . 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 5158	. . . . . . . . . 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 6896	. . . . . . . . . . 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 5160	. . . . . . . . . 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 631	. . . . . . . . 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 482	. . . . . . . 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 496	. . . . . . . 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 3614	. . . . . . 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 413	. . . . . 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 3211	. . . . 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 3200	. . 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 35379	. 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 396 ∧ w3a 1087 = wceq 1541 ∈ wcel 2106 ≠ wne 2940 ∀wral 3061 ∃wrex 3070 ∖ cdif 3945 ⊆ wss 3948 ifcif 4528 {csn 4628 class class class wbr 5148 ↦ cmpt 5231 dom cdm 5676 ⟶wf 6539 ‘cfv 6543 (class class class)co 7408 ℂcc 11107 ℝcr 11108 · cmul 11114 < clt 11247 ≤ cle 11248 − cmin 11443 / cdiv 11870 2c2 12266 ℝ⁺crp 12973 abscabs 15180 D cdv 25379

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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7724 ax-cnex 11165 ax-resscn 11166 ax-1cn 11167 ax-icn 11168 ax-addcl 11169 ax-addrcl 11170 ax-mulcl 11171 ax-mulrcl 11172 ax-mulcom 11173 ax-addass 11174 ax-mulass 11175 ax-distr 11176 ax-i2m1 11177 ax-1ne0 11178 ax-1rid 11179 ax-rnegex 11180 ax-rrecex 11181 ax-cnre 11182 ax-pre-lttri 11183 ax-pre-lttrn 11184 ax-pre-ltadd 11185 ax-pre-mulgt0 11186 ax-pre-sup 11187

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3376 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-tp 4633 df-op 4635 df-uni 4909 df-int 4951 df-iun 4999 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 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 7364 df-ov 7411 df-oprab 7412 df-mpo 7413 df-om 7855 df-1st 7974 df-2nd 7975 df-frecs 8265 df-wrecs 8296 df-recs 8370 df-rdg 8409 df-1o 8465 df-er 8702 df-map 8821 df-pm 8822 df-en 8939 df-dom 8940 df-sdom 8941 df-fin 8942 df-fi 9405 df-sup 9436 df-inf 9437 df-pnf 11249 df-mnf 11250 df-xr 11251 df-ltxr 11252 df-le 11253 df-sub 11445 df-neg 11446 df-div 11871 df-nn 12212 df-2 12274 df-3 12275 df-4 12276 df-5 12277 df-6 12278 df-7 12279 df-8 12280 df-9 12281 df-n0 12472 df-z 12558 df-dec 12677 df-uz 12822 df-q 12932 df-rp 12974 df-xneg 13091 df-xadd 13092 df-xmul 13093 df-fz 13484 df-seq 13966 df-exp 14027 df-cj 15045 df-re 15046 df-im 15047 df-sqrt 15181 df-abs 15182 df-struct 17079 df-slot 17114 df-ndx 17126 df-base 17144 df-plusg 17209 df-mulr 17210 df-starv 17211 df-tset 17215 df-ple 17216 df-ds 17218 df-unif 17219 df-rest 17367 df-topn 17368 df-topgen 17388 df-psmet 20935 df-xmet 20936 df-met 20937 df-bl 20938 df-mopn 20939 df-cnfld 20944 df-top 22395 df-topon 22412 df-topsp 22434 df-bases 22448 df-ntr 22523 df-cnp 22731 df-xms 23825 df-ms 23826 df-limc 25382 df-dv 25383

This theorem is referenced by: knoppndv 35405

W3C validator