unblimceq0 - Mathbox for Asger C. Ipsen

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Theorem unblimceq0 35383

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 12978	. . . . . . . 8 ⊢ 1 ∈ ℝ⁺
2	1	a1i 11	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → 1 ∈ ℝ⁺)
3		breq2 5153	. . . . . . . . . . 11 ⊢ (𝑒 = 1 → ((abs‘((𝐹‘𝑧) − 𝑦)) < 𝑒 ↔ (abs‘((𝐹‘𝑧) − 𝑦)) < 1))
4	3	imbi2d 341	. . . . . . . . . 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 3221	. . . . . . . . 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 483	. . . . . . 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 1222	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) ∧ (𝑧 ∈ 𝑆 ∧ (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))) → 𝑧 ≠ 𝐴)
9		simprr2 1223	. . . . . . . . . . . 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 513	. . . . . . . . . . 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 11215	. . . . . . . . . . . 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 725	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → 𝐹:𝑆⟶ℂ)
14	13	adantr 482	. . . . . . . . . . . . . . 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 770	. . . . . . . . . . . . . . 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 7088	. . . . . . . . . . . . . 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 768	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → 𝑦 ∈ ℂ)
18	17	adantr 482	. . . . . . . . . . . . . 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 11571	. . . . . . . . . . . . 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 15383	. . . . . . . . . . . 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 15383	. . . . . . . . . . . . . 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 15383	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → (abs‘𝑦) ∈ ℝ)
23	22	adantr 482	. . . . . . . . . . . . . 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 11642	. . . . . . . . . . . . 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 11209	. . . . . . . . . . . . . . 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 11242	. . . . . . . . . . . . . . 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 11572	. . . . . . . . . . . . . 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 11215	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → 1 ∈ ℝ)
29	28, 22	readdcld 11243	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → (1 + (abs‘𝑦)) ∈ ℝ)
30	29	adantr 482	. . . . . . . . . . . . . . 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 1224	. . . . . . . . . . . . . . 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 11830	. . . . . . . . . . . . . 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 5173	. . . . . . . . . . . . 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 15404	. . . . . . . . . . . . 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 11371	. . . . . . . . . . . 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 11365	. . . . . . . . . . 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 5153	. . . . . . . . . . . . 13 ⊢ (𝑑 = 𝑐 → ((abs‘(𝑧 − 𝐴)) < 𝑑 ↔ (abs‘(𝑧 − 𝐴)) < 𝑐))
39	38	3anbi2d 1442	. . . . . . . . . . . 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 3179	. . . . . . . . . . 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 5152	. . . . . . . . . . . . . . 15 ⊢ (𝑎 = (1 + (abs‘𝑦)) → (𝑎 ≤ (abs‘(𝐹‘𝑧)) ↔ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))
42	41	3anbi3d 1443	. . . . . . . . . . . . . 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 3179	. . . . . . . . . . . . 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 3178	. . . . . . . . . . . 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 35382	. . . . . . . . . . . . 13 ⊢ (𝜑 → ∀𝑎 ∈ ℝ⁺ ∀𝑑 ∈ ℝ⁺ ∃𝑧 ∈ 𝑆 (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑑 ∧ 𝑎 ≤ (abs‘(𝐹‘𝑧))))
49	48	ad2antrr 725	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → ∀𝑎 ∈ ℝ⁺ ∀𝑑 ∈ ℝ⁺ ∃𝑧 ∈ 𝑆 (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑑 ∧ 𝑎 ≤ (abs‘(𝐹‘𝑧))))
50		0lt1 11736	. . . . . . . . . . . . . . 15 ⊢ 0 < 1
51	50	a1i 11	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → 0 < 1)
52	17	absge0d 15391	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → 0 ≤ (abs‘𝑦))
53	28, 22, 51, 52	addgtge0d 11788	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → 0 < (1 + (abs‘𝑦)))
54	29, 53	elrpd 13013	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → (1 + (abs‘𝑦)) ∈ ℝ⁺)
55	44, 49, 54	rspcdva 3614	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → ∀𝑑 ∈ ℝ⁺ ∃𝑧 ∈ 𝑆 (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑑 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))
56		simpr 486	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → 𝑐 ∈ ℝ⁺)
57	40, 55, 56	rspcdva 3614	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → ∃𝑧 ∈ 𝑆 (𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐 ∧ (1 + (abs‘𝑦)) ≤ (abs‘(𝐹‘𝑧))))
58	37, 57	reximddv 3172	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑦 ∈ ℂ) ∧ 𝑐 ∈ ℝ⁺) → ∃𝑧 ∈ 𝑆 ¬ ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 1))
59		rexnal 3101	. . . . . . . . 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 3150	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → ¬ ∃𝑐 ∈ ℝ⁺ ∀𝑧 ∈ 𝑆 ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 1))
62	2, 7, 61	rspcedvd 3615	. . . . . 6 ⊢ ((𝜑 ∧ 𝑦 ∈ ℂ) → ∃𝑒 ∈ ℝ⁺ ¬ ∃𝑐 ∈ ℝ⁺ ∀𝑧 ∈ 𝑆 ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 𝑒))
63		rexnal 3101	. . . . . 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 414	. . . 4 ⊢ (𝜑 → (𝑦 ∈ ℂ → ¬ ∀𝑒 ∈ ℝ⁺ ∃𝑐 ∈ ℝ⁺ ∀𝑧 ∈ 𝑆 ((𝑧 ≠ 𝐴 ∧ (abs‘(𝑧 − 𝐴)) < 𝑐) → (abs‘((𝐹‘𝑧) − 𝑦)) < 𝑒)))
66		imnan 401	. . . 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 25396	. . 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 4405	1 ⊢ (𝜑 → (𝐹 lim_ℂ 𝐴) = ∅)

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 397 ∧ w3a 1088 = wceq 1542 ∈ wcel 2107 ≠ wne 2941 ∀wral 3062 ∃wrex 3071 ⊆ wss 3949 ∅c0 4323 class class class wbr 5149 ⟶wf 6540 ‘cfv 6544 (class class class)co 7409 ℂcc 11108 ℝcr 11109 0cc0 11110 1c1 11111 + caddc 11113 < clt 11248 ≤ cle 11249 − cmin 11444 ℝ⁺crp 12974 abscabs 15181 lim_ℂ climc 25379

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5286 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725 ax-cnex 11166 ax-resscn 11167 ax-1cn 11168 ax-icn 11169 ax-addcl 11170 ax-addrcl 11171 ax-mulcl 11172 ax-mulrcl 11173 ax-mulcom 11174 ax-addass 11175 ax-mulass 11176 ax-distr 11177 ax-i2m1 11178 ax-1ne0 11179 ax-1rid 11180 ax-rnegex 11181 ax-rrecex 11182 ax-cnre 11183 ax-pre-lttri 11184 ax-pre-lttrn 11185 ax-pre-ltadd 11186 ax-pre-mulgt0 11187 ax-pre-sup 11188

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3377 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-tp 4634 df-op 4636 df-uni 4910 df-int 4952 df-iun 5000 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-riota 7365 df-ov 7412 df-oprab 7413 df-mpo 7414 df-om 7856 df-1st 7975 df-2nd 7976 df-frecs 8266 df-wrecs 8297 df-recs 8371 df-rdg 8410 df-1o 8466 df-er 8703 df-map 8822 df-pm 8823 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-fi 9406 df-sup 9437 df-inf 9438 df-pnf 11250 df-mnf 11251 df-xr 11252 df-ltxr 11253 df-le 11254 df-sub 11446 df-neg 11447 df-div 11872 df-nn 12213 df-2 12275 df-3 12276 df-4 12277 df-5 12278 df-6 12279 df-7 12280 df-8 12281 df-9 12282 df-n0 12473 df-z 12559 df-dec 12678 df-uz 12823 df-q 12933 df-rp 12975 df-xneg 13092 df-xadd 13093 df-xmul 13094 df-fz 13485 df-seq 13967 df-exp 14028 df-cj 15046 df-re 15047 df-im 15048 df-sqrt 15182 df-abs 15183 df-struct 17080 df-slot 17115 df-ndx 17127 df-base 17145 df-plusg 17210 df-mulr 17211 df-starv 17212 df-tset 17216 df-ple 17217 df-ds 17219 df-unif 17220 df-rest 17368 df-topn 17369 df-topgen 17389 df-psmet 20936 df-xmet 20937 df-met 20938 df-bl 20939 df-mopn 20940 df-cnfld 20945 df-top 22396 df-topon 22413 df-topsp 22435 df-bases 22449 df-cnp 22732 df-xms 23826 df-ms 23827 df-limc 25383

This theorem is referenced by: unbdqndv1 35384

W3C validator