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Theorem reconn 24344

Description: A subset of the reals is connected iff it has the interval property. (Contributed by Jeff Hankins, 15-Jul-2009.) (Proof shortened by Mario Carneiro, 9-Sep-2015.)

**Assertion**
Ref	Expression
reconn	⊢ (𝐴 ⊆ ℝ → (((topGen‘ran (,)) ↾_t 𝐴) ∈ Conn ↔ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴))

Distinct variable group: 𝑥,𝑦,𝐴

Proof of Theorem reconn Dummy variables 𝑏 𝑐 𝑢 𝑣 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		reconnlem1 24342	. . . 4 ⊢ (((𝐴 ⊆ ℝ ∧ ((topGen‘ran (,)) ↾_t 𝐴) ∈ Conn) ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴)) → (𝑥[,]𝑦) ⊆ 𝐴)
2	1	ralrimivva 3201	. . 3 ⊢ ((𝐴 ⊆ ℝ ∧ ((topGen‘ran (,)) ↾_t 𝐴) ∈ Conn) → ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴)
3	2	ex 414	. 2 ⊢ (𝐴 ⊆ ℝ → (((topGen‘ran (,)) ↾_t 𝐴) ∈ Conn → ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴))
4		n0 4347	. . . . . . . . 9 ⊢ ((𝑢 ∩ 𝐴) ≠ ∅ ↔ ∃𝑏 𝑏 ∈ (𝑢 ∩ 𝐴))
5		n0 4347	. . . . . . . . 9 ⊢ ((𝑣 ∩ 𝐴) ≠ ∅ ↔ ∃𝑐 𝑐 ∈ (𝑣 ∩ 𝐴))
6	4, 5	anbi12i 628	. . . . . . . 8 ⊢ (((𝑢 ∩ 𝐴) ≠ ∅ ∧ (𝑣 ∩ 𝐴) ≠ ∅) ↔ (∃𝑏 𝑏 ∈ (𝑢 ∩ 𝐴) ∧ ∃𝑐 𝑐 ∈ (𝑣 ∩ 𝐴)))
7		exdistrv 1960	. . . . . . . . 9 ⊢ (∃𝑏∃𝑐(𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ↔ (∃𝑏 𝑏 ∈ (𝑢 ∩ 𝐴) ∧ ∃𝑐 𝑐 ∈ (𝑣 ∩ 𝐴)))
8		simplll 774	. . . . . . . . . . . . 13 ⊢ ((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) → 𝐴 ⊆ ℝ)
9		simprll 778	. . . . . . . . . . . . . 14 ⊢ ((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) → 𝑏 ∈ (𝑢 ∩ 𝐴))
10	9	elin2d 4200	. . . . . . . . . . . . 13 ⊢ ((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) → 𝑏 ∈ 𝐴)
11	8, 10	sseldd 3984	. . . . . . . . . . . 12 ⊢ ((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) → 𝑏 ∈ ℝ)
12		simprlr 779	. . . . . . . . . . . . . 14 ⊢ ((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) → 𝑐 ∈ (𝑣 ∩ 𝐴))
13	12	elin2d 4200	. . . . . . . . . . . . 13 ⊢ ((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) → 𝑐 ∈ 𝐴)
14	8, 13	sseldd 3984	. . . . . . . . . . . 12 ⊢ ((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) → 𝑐 ∈ ℝ)
15	8	adantr 482	. . . . . . . . . . . . 13 ⊢ (((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) ∧ 𝑏 ≤ 𝑐) → 𝐴 ⊆ ℝ)
16		simplrl 776	. . . . . . . . . . . . . 14 ⊢ (((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) → 𝑢 ∈ (topGen‘ran (,)))
17	16	ad2antrr 725	. . . . . . . . . . . . 13 ⊢ (((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) ∧ 𝑏 ≤ 𝑐) → 𝑢 ∈ (topGen‘ran (,)))
18		simplrr 777	. . . . . . . . . . . . . 14 ⊢ (((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) → 𝑣 ∈ (topGen‘ran (,)))
19	18	ad2antrr 725	. . . . . . . . . . . . 13 ⊢ (((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) ∧ 𝑏 ≤ 𝑐) → 𝑣 ∈ (topGen‘ran (,)))
20		simpllr 775	. . . . . . . . . . . . 13 ⊢ (((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) ∧ 𝑏 ≤ 𝑐) → ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴)
21	9	adantr 482	. . . . . . . . . . . . 13 ⊢ (((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) ∧ 𝑏 ≤ 𝑐) → 𝑏 ∈ (𝑢 ∩ 𝐴))
22	12	adantr 482	. . . . . . . . . . . . 13 ⊢ (((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) ∧ 𝑏 ≤ 𝑐) → 𝑐 ∈ (𝑣 ∩ 𝐴))
23		simplrr 777	. . . . . . . . . . . . 13 ⊢ (((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) ∧ 𝑏 ≤ 𝑐) → (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))
24		simpr 486	. . . . . . . . . . . . 13 ⊢ (((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) ∧ 𝑏 ≤ 𝑐) → 𝑏 ≤ 𝑐)
25		eqid 2733	. . . . . . . . . . . . 13 ⊢ sup((𝑢 ∩ (𝑏[,]𝑐)), ℝ, < ) = sup((𝑢 ∩ (𝑏[,]𝑐)), ℝ, < )
26	15, 17, 19, 20, 21, 22, 23, 24, 25	reconnlem2 24343	. . . . . . . . . . . 12 ⊢ (((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) ∧ 𝑏 ≤ 𝑐) → ¬ 𝐴 ⊆ (𝑢 ∪ 𝑣))
27	8	adantr 482	. . . . . . . . . . . . . 14 ⊢ (((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) ∧ 𝑐 ≤ 𝑏) → 𝐴 ⊆ ℝ)
28	18	ad2antrr 725	. . . . . . . . . . . . . 14 ⊢ (((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) ∧ 𝑐 ≤ 𝑏) → 𝑣 ∈ (topGen‘ran (,)))
29	16	ad2antrr 725	. . . . . . . . . . . . . 14 ⊢ (((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) ∧ 𝑐 ≤ 𝑏) → 𝑢 ∈ (topGen‘ran (,)))
30		simpllr 775	. . . . . . . . . . . . . 14 ⊢ (((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) ∧ 𝑐 ≤ 𝑏) → ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴)
31	12	adantr 482	. . . . . . . . . . . . . 14 ⊢ (((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) ∧ 𝑐 ≤ 𝑏) → 𝑐 ∈ (𝑣 ∩ 𝐴))
32	9	adantr 482	. . . . . . . . . . . . . 14 ⊢ (((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) ∧ 𝑐 ≤ 𝑏) → 𝑏 ∈ (𝑢 ∩ 𝐴))
33		incom 4202	. . . . . . . . . . . . . . 15 ⊢ (𝑣 ∩ 𝑢) = (𝑢 ∩ 𝑣)
34		simplrr 777	. . . . . . . . . . . . . . 15 ⊢ (((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) ∧ 𝑐 ≤ 𝑏) → (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))
35	33, 34	eqsstrid 4031	. . . . . . . . . . . . . 14 ⊢ (((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) ∧ 𝑐 ≤ 𝑏) → (𝑣 ∩ 𝑢) ⊆ (ℝ ∖ 𝐴))
36		simpr 486	. . . . . . . . . . . . . 14 ⊢ (((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) ∧ 𝑐 ≤ 𝑏) → 𝑐 ≤ 𝑏)
37		eqid 2733	. . . . . . . . . . . . . 14 ⊢ sup((𝑣 ∩ (𝑐[,]𝑏)), ℝ, < ) = sup((𝑣 ∩ (𝑐[,]𝑏)), ℝ, < )
38	27, 28, 29, 30, 31, 32, 35, 36, 37	reconnlem2 24343	. . . . . . . . . . . . 13 ⊢ (((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) ∧ 𝑐 ≤ 𝑏) → ¬ 𝐴 ⊆ (𝑣 ∪ 𝑢))
39		uncom 4154	. . . . . . . . . . . . . 14 ⊢ (𝑣 ∪ 𝑢) = (𝑢 ∪ 𝑣)
40	39	sseq2i 4012	. . . . . . . . . . . . 13 ⊢ (𝐴 ⊆ (𝑣 ∪ 𝑢) ↔ 𝐴 ⊆ (𝑢 ∪ 𝑣))
41	38, 40	sylnib 328	. . . . . . . . . . . 12 ⊢ (((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) ∧ 𝑐 ≤ 𝑏) → ¬ 𝐴 ⊆ (𝑢 ∪ 𝑣))
42	11, 14, 26, 41	lecasei 11320	. . . . . . . . . . 11 ⊢ ((((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) ∧ ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴))) → ¬ 𝐴 ⊆ (𝑢 ∪ 𝑣))
43	42	exp32 422	. . . . . . . . . 10 ⊢ (((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) → ((𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) → ((𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴) → ¬ 𝐴 ⊆ (𝑢 ∪ 𝑣))))
44	43	exlimdvv 1938	. . . . . . . . 9 ⊢ (((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) → (∃𝑏∃𝑐(𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) → ((𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴) → ¬ 𝐴 ⊆ (𝑢 ∪ 𝑣))))
45	7, 44	biimtrrid 242	. . . . . . . 8 ⊢ (((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) → ((∃𝑏 𝑏 ∈ (𝑢 ∩ 𝐴) ∧ ∃𝑐 𝑐 ∈ (𝑣 ∩ 𝐴)) → ((𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴) → ¬ 𝐴 ⊆ (𝑢 ∪ 𝑣))))
46	6, 45	biimtrid 241	. . . . . . 7 ⊢ (((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) → (((𝑢 ∩ 𝐴) ≠ ∅ ∧ (𝑣 ∩ 𝐴) ≠ ∅) → ((𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴) → ¬ 𝐴 ⊆ (𝑢 ∪ 𝑣))))
47	46	expd 417	. . . . . 6 ⊢ (((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) → ((𝑢 ∩ 𝐴) ≠ ∅ → ((𝑣 ∩ 𝐴) ≠ ∅ → ((𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴) → ¬ 𝐴 ⊆ (𝑢 ∪ 𝑣)))))
48	47	3impd 1349	. . . . 5 ⊢ (((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) → (((𝑢 ∩ 𝐴) ≠ ∅ ∧ (𝑣 ∩ 𝐴) ≠ ∅ ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴)) → ¬ 𝐴 ⊆ (𝑢 ∪ 𝑣)))
49	48	ex 414	. . . 4 ⊢ ((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) → (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴 → (((𝑢 ∩ 𝐴) ≠ ∅ ∧ (𝑣 ∩ 𝐴) ≠ ∅ ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴)) → ¬ 𝐴 ⊆ (𝑢 ∪ 𝑣))))
50	49	ralrimdvva 3210	. . 3 ⊢ (𝐴 ⊆ ℝ → (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴 → ∀𝑢 ∈ (topGen‘ran (,))∀𝑣 ∈ (topGen‘ran (,))(((𝑢 ∩ 𝐴) ≠ ∅ ∧ (𝑣 ∩ 𝐴) ≠ ∅ ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴)) → ¬ 𝐴 ⊆ (𝑢 ∪ 𝑣))))
51		retopon 24280	. . . 4 ⊢ (topGen‘ran (,)) ∈ (TopOn‘ℝ)
52		connsub 22925	. . . 4 ⊢ (((topGen‘ran (,)) ∈ (TopOn‘ℝ) ∧ 𝐴 ⊆ ℝ) → (((topGen‘ran (,)) ↾_t 𝐴) ∈ Conn ↔ ∀𝑢 ∈ (topGen‘ran (,))∀𝑣 ∈ (topGen‘ran (,))(((𝑢 ∩ 𝐴) ≠ ∅ ∧ (𝑣 ∩ 𝐴) ≠ ∅ ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴)) → ¬ 𝐴 ⊆ (𝑢 ∪ 𝑣))))
53	51, 52	mpan 689	. . 3 ⊢ (𝐴 ⊆ ℝ → (((topGen‘ran (,)) ↾_t 𝐴) ∈ Conn ↔ ∀𝑢 ∈ (topGen‘ran (,))∀𝑣 ∈ (topGen‘ran (,))(((𝑢 ∩ 𝐴) ≠ ∅ ∧ (𝑣 ∩ 𝐴) ≠ ∅ ∧ (𝑢 ∩ 𝑣) ⊆ (ℝ ∖ 𝐴)) → ¬ 𝐴 ⊆ (𝑢 ∪ 𝑣))))
54	50, 53	sylibrd 259	. 2 ⊢ (𝐴 ⊆ ℝ → (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴 → ((topGen‘ran (,)) ↾_t 𝐴) ∈ Conn))
55	3, 54	impbid 211	1 ⊢ (𝐴 ⊆ ℝ → (((topGen‘ran (,)) ↾_t 𝐴) ∈ Conn ↔ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 397 ∧ w3a 1088 ∃wex 1782 ∈ wcel 2107 ≠ wne 2941 ∀wral 3062 ∖ cdif 3946 ∪ cun 3947 ∩ cin 3948 ⊆ wss 3949 ∅c0 4323 class class class wbr 5149 ran crn 5678 ‘cfv 6544 (class class class)co 7409 supcsup 9435 ℝcr 11109 < clt 11248 ≤ cle 11249 (,)cioo 13324 [,]cicc 13327 ↾_t crest 17366 topGenctg 17383 TopOnctopon 22412 Conncconn 22915

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-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-er 8703 df-map 8822 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-n0 12473 df-z 12559 df-uz 12823 df-q 12933 df-rp 12975 df-xneg 13092 df-xadd 13093 df-xmul 13094 df-ioo 13328 df-ico 13330 df-icc 13331 df-seq 13967 df-exp 14028 df-cj 15046 df-re 15047 df-im 15048 df-sqrt 15182 df-abs 15183 df-rest 17368 df-topgen 17389 df-psmet 20936 df-xmet 20937 df-met 20938 df-bl 20939 df-mopn 20940 df-top 22396 df-topon 22413 df-bases 22449 df-cld 22523 df-conn 22916

This theorem is referenced by: retopconn 24345 iccconn 24346 resconn 34268 ioosconn 34269 iccllysconn 34272 ivthALT 35268

W3C validator