unblimceq0 - Mathbox for Asger C. Ipsen

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Theorem unblimceq0 35891

Description: If 𝐹 is unbounded near 𝐴 it has no limit at 𝐴. (Contributed by Asger C. Ipsen, 12-May-2021.)

**Hypotheses**
Ref	Expression
unblimceq0.0	⊢ (𝜑 → 𝑆 ⊆ ℂ)
unblimceq0.1	⊢ (𝜑 → 𝐹:𝑆⟶ℂ)
unblimceq0.2	⊢ (𝜑 → 𝐴 ∈ ℂ)
unblimceq0.3	⊢ (𝜑 → ∀𝑏 ∈ ℝ⁺ ∀𝑑 ∈ ℝ⁺ ∃𝑥 ∈ 𝑆 ((abs‘(𝑥 − 𝐴)) < 𝑑 ∧ 𝑏 ≤ (abs‘(𝐹‘𝑥))))

**Assertion**
Ref	Expression
unblimceq0	⊢ (𝜑 → (𝐹 lim_ℂ 𝐴) = ∅)

Distinct variable groups: 𝐴,𝑏,𝑑,𝑥 𝐹,𝑏,𝑑,𝑥 𝑆,𝑏,𝑑,𝑥 𝜑,𝑏,𝑑,𝑥

Proof of Theorem unblimceq0 Dummy variables 𝑎 𝑐 𝑦 𝑧 𝑒 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		1rp 12984	. . . . . . . 8 ⊢ 1 ∈ ℝ⁺
2	1	a1i 11	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → 1 ∈ ℝ⁺)
3		breq2 5145	. . . . . . . . . . 11 ⊢ (𝑒 = 1 → ((abs‘((𝐹‘𝑧) − 𝑦)) < 𝑒 ↔ (abs‘((𝐹‘𝑧) − 𝑦)) < 1))
4	3	imbi2d 340	. . . . . . . . . 10 ⊢ (𝑒 = 1 → (((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 𝑒) ↔ ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 1)))
5	4	rexralbidv 3214	. . . . . . . . 9 ⊢ (𝑒 = 1 → (∃𝑐 ∈ ℝ⁺ ∀𝑧 ∈ 𝑆 ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 𝑒) ↔ ∃𝑐 ∈ ℝ⁺ ∀𝑧 ∈ 𝑆 ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 1)))
6	5	notbid 318	. . . . . . . 8 ⊢ (𝑒 = 1 → (¬ ∃𝑐 ∈ ℝ⁺ ∀𝑧 ∈ 𝑆 ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 𝑒) ↔ ¬ ∃𝑐 ∈ ℝ⁺ ∀𝑧 ∈ 𝑆 ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 1)))
7	6	adantl 481	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑒 = 1) → (¬ ∃𝑐 ∈ ℝ⁺ ∀𝑧 ∈ 𝑆 ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 𝑒) ↔ ¬ ∃𝑐 ∈ ℝ⁺ ∀𝑧 ∈ 𝑆 ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 1)))
8		simprr1 1218	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → 𝑧 ≠ 𝐴)
9		simprr2 1219	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → (abs‘(𝑧 − 𝐴)) < 𝑐)
10	8, 9	jca 511	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐))
11		1red 11219	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → 1 ∈ ℝ)
12		unblimceq0.1	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → 𝐹:𝑆⟶ℂ)
13	12	ad2antrr 723	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → 𝐹:𝑆⟶ℂ)
14	13	adantr 480	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → 𝐹:𝑆⟶ℂ)
15		simprl 768	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → 𝑧 ∈ 𝑆)
16	14, 15	ffvelcdmd 7081	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → (𝐹‘𝑧) ∈ ℂ)
17		simplr 766	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → 𝑦 ∈ ℂ)
18	17	adantr 480	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → 𝑦 ∈ ℂ)
19	16, 18	subcld 11575	. . . . . . . . . . . . 13 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → ((𝐹‘𝑧) − 𝑦) ∈ ℂ)
20	19	abscld 15389	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → (abs‘((𝐹‘𝑧) − 𝑦)) ∈ ℝ)
21	16	abscld 15389	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → (abs‘(𝐹‘𝑧)) ∈ ℝ)
22	17	abscld 15389	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → (abs‘𝑦) ∈ ℝ)
23	22	adantr 480	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → (abs‘𝑦) ∈ ℝ)
24	21, 23	resubcld 11646	. . . . . . . . . . . . 13 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → ((abs‘(𝐹‘𝑧)) − (abs‘𝑦)) ∈ ℝ)
25		1cnd 11213	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → 1 ∈ ℂ)
26	23	recnd 11246	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → (abs‘𝑦) ∈ ℂ)
27	25, 26	pncand 11576	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → ((1 + (abs‘𝑦)) − (abs‘𝑦)) = 1)
28		1red 11219	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → 1 ∈ ℝ)
29	28, 22	readdcld 11247	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → (1 + (abs‘𝑦)) ∈ ℝ)
30	29	adantr 480	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → (1 + (abs‘𝑦)) ∈ ℝ)
31		simprr3 1220	. . . . . . . . . . . . . . 15 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧)))
32	30, 21, 23, 31	lesub1dd 11834	. . . . . . . . . . . . . 14 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → ((1 + (abs‘𝑦)) − (abs‘𝑦)) ≤ ((abs‘(𝐹‘𝑧)) − (abs‘𝑦)))
33	27, 32	eqbrtrrd 5165	. . . . . . . . . . . . 13 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → 1 ≤ ((abs‘(𝐹‘𝑧)) − (abs‘𝑦)))
34	16, 18	abs2difd 15410	. . . . . . . . . . . . 13 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → ((abs‘(𝐹‘𝑧)) − (abs‘𝑦)) ≤ (abs‘((𝐹‘𝑧) − 𝑦)))
35	11, 24, 20, 33, 34	letrd 11375	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → 1 ≤ (abs‘((𝐹‘𝑧) − 𝑦)))
36	11, 20, 35	lensymd 11369	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → ¬ (abs‘((𝐹‘𝑧) − 𝑦)) < 1)
37	10, 36	jcnd 163	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → ¬ ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 1))
38		breq2 5145	. . . . . . . . . . . . 13 ⊢ (𝑑 = 𝑐 → ((abs‘(𝑧 − 𝐴)) < 𝑑 ↔ (abs‘(𝑧 − 𝐴)) < 𝑐))
39	38	3anbi2d 1437	. . . . . . . . . . . 12 ⊢ (𝑑 = 𝑐 → ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑑 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))) ↔ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧)))))
40	39	rexbidv 3172	. . . . . . . . . . 11 ⊢ (𝑑 = 𝑐 → (∃𝑧 ∈ 𝑆 (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑑 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))) ↔ ∃𝑧 ∈ 𝑆 (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧)))))
41		breq1 5144	. . . . . . . . . . . . . . 15 ⊢ (𝑎 = (1 + (abs‘𝑦)) → (𝑎 ≤ (abs‘(𝐹‘𝑧)) ↔ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))
42	41	3anbi3d 1438	. . . . . . . . . . . . . 14 ⊢ (𝑎 = (1 + (abs‘𝑦)) → ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑑 ∧ 𝑎 ≤ (abs‘(𝐹‘𝑧))) ↔ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑑 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧)))))
43	42	rexbidv 3172	. . . . . . . . . . . . 13 ⊢ (𝑎 = (1 + (abs‘𝑦)) → (∃𝑧 ∈ 𝑆 (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑑 ∧ 𝑎 ≤ (abs‘(𝐹‘𝑧))) ↔ ∃𝑧 ∈ 𝑆 (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑑 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧)))))
44	43	ralbidv 3171	. . . . . . . . . . . 12 ⊢ (𝑎 = (1 + (abs‘𝑦)) → (∀𝑑 ∈ ℝ⁺ ∃𝑧 ∈ 𝑆 (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑑 ∧ 𝑎 ≤ (abs‘(𝐹‘𝑧))) ↔ ∀𝑑 ∈ ℝ⁺ ∃𝑧 ∈ 𝑆 (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑑 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧)))))
45		unblimceq0.0	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝑆 ⊆ ℂ)
46		unblimceq0.2	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝐴 ∈ ℂ)
47		unblimceq0.3	. . . . . . . . . . . . . 14 ⊢ (𝜑 → ∀𝑏 ∈ ℝ⁺ ∀𝑑 ∈ ℝ⁺ ∃𝑥 ∈ 𝑆 ((abs‘(𝑥 − 𝐴)) < 𝑑 ∧ 𝑏 ≤ (abs‘(𝐹‘𝑥))))
48	45, 12, 46, 47	unblimceq0lem 35890	. . . . . . . . . . . . 13 ⊢ (𝜑 → ∀𝑎 ∈ ℝ⁺ ∀𝑑 ∈ ℝ⁺ ∃𝑧 ∈ 𝑆 (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑑 ∧ 𝑎 ≤ (abs‘(𝐹‘𝑧))))
49	48	ad2antrr 723	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → ∀𝑎 ∈ ℝ⁺ ∀𝑑 ∈ ℝ⁺ ∃𝑧 ∈ 𝑆 (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑑 ∧ 𝑎 ≤ (abs‘(𝐹‘𝑧))))
50		0lt1 11740	. . . . . . . . . . . . . . 15 ⊢ 0 < 1
51	50	a1i 11	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → 0 < 1)
52	17	absge0d 15397	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → 0 ≤ (abs‘𝑦))
53	28, 22, 51, 52	addgtge0d 11792	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → 0 < (1 + (abs‘𝑦)))
54	29, 53	elrpd 13019	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → (1 + (abs‘𝑦)) ∈ ℝ⁺)
55	44, 49, 54	rspcdva 3607	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → ∀𝑑 ∈ ℝ⁺ ∃𝑧 ∈ 𝑆 (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑑 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))
56		simpr 484	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → 𝑐 ∈ ℝ⁺)
57	40, 55, 56	rspcdva 3607	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → ∃𝑧 ∈ 𝑆 (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))
58	37, 57	reximddv 3165	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → ∃𝑧 ∈ 𝑆 ¬ ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 1))
59		rexnal 3094	. . . . . . . . 9 ⊢ (∃𝑧 ∈ 𝑆 ¬ ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 1) ↔ ¬ ∀𝑧 ∈ 𝑆 ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 1))
60	58, 59	sylib 217	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → ¬ ∀𝑧 ∈ 𝑆 ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 1))
61	60	nrexdv 3143	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → ¬ ∃𝑐 ∈ ℝ⁺ ∀𝑧 ∈ 𝑆 ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 1))
62	2, 7, 61	rspcedvd 3608	. . . . . 6 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → ∃𝑒 ∈ ℝ⁺ ¬ ∃𝑐 ∈ ℝ⁺ ∀𝑧 ∈ 𝑆 ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 𝑒))
63		rexnal 3094	. . . . . 6 ⊢ (∃𝑒 ∈ ℝ⁺ ¬ ∃𝑐 ∈ ℝ⁺ ∀𝑧 ∈ 𝑆 ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 𝑒) ↔ ¬ ∀𝑒 ∈ ℝ⁺ ∃𝑐 ∈ ℝ⁺ ∀𝑧 ∈ 𝑆 ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 𝑒))
64	62, 63	sylib 217	. . . . 5 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → ¬ ∀𝑒 ∈ ℝ⁺ ∃𝑐 ∈ ℝ⁺ ∀𝑧 ∈ 𝑆 ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 𝑒))
65	64	ex 412	. . . 4 ⊢ (𝜑 → (𝑦 ∈ ℂ → ¬ ∀𝑒 ∈ ℝ⁺ ∃𝑐 ∈ ℝ⁺ ∀𝑧 ∈ 𝑆 ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 𝑒)))
66		imnan 399	. . . 4 ⊢ ((𝑦 ∈ ℂ → ¬ ∀𝑒 ∈ ℝ⁺ ∃𝑐 ∈ ℝ⁺ ∀𝑧 ∈ 𝑆 ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 𝑒)) ↔ ¬ (𝑦 ∈ ℂ ∧ ∀𝑒 ∈ ℝ⁺ ∃𝑐 ∈ ℝ⁺ ∀𝑧 ∈ 𝑆 ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 𝑒)))
67	65, 66	sylib 217	. . 3 ⊢ (𝜑 → ¬ (𝑦 ∈ ℂ ∧ ∀𝑒 ∈ ℝ⁺ ∃𝑐 ∈ ℝ⁺ ∀𝑧 ∈ 𝑆 ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 𝑒)))
68	12, 45, 46	ellimc3 25763	. . 3 ⊢ (𝜑 → (𝑦 ∈ (𝐹 lim_ℂ 𝐴) ↔ (𝑦 ∈ ℂ ∧ ∀𝑒 ∈ ℝ⁺ ∃𝑐 ∈ ℝ⁺ ∀𝑧 ∈ 𝑆 ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 𝑒))))
69	67, 68	mtbird 325	. 2 ⊢ (𝜑 → ¬ 𝑦 ∈ (𝐹 lim_ℂ 𝐴))
70	69	eq0rdv 4399	1 ⊢ (𝜑 → (𝐹 lim_ℂ 𝐴) = ∅)

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 ⊆ wss 3943 ∅c0 4317 class class class wbr 5141 ⟶wf 6533 ‘cfv 6537 (class class class)co 7405 ℂcc 11110 ℝcr 11111 0cc0 11112 1c1 11113 + caddc 11115 < clt 11252 ≤ cle 11253 − cmin 11448 ℝ⁺crp 12980 abscabs 15187 lim_ℂ climc 25746

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-cnp 23087 df-xms 24181 df-ms 24182 df-limc 25750

This theorem is referenced by: unbdqndv1 35892

W3C validator