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Theorem reconn 24343

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 24341	. . . 4 ⊢ (((𝐴 ⊆ ℝ ∧ ((topGen‘ran (,)) ↾_t 𝐴) ∈ Conn) ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴)) → (𝑥[,]𝑦) ⊆ 𝐴)
2	1	ralrimivva 3200	. . 3 ⊢ ((𝐴 ⊆ ℝ ∧ ((topGen‘ran (,)) ↾_t 𝐴) ∈ Conn) → ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴)
3	2	ex 413	. 2 ⊢ (𝐴 ⊆ ℝ → (((topGen‘ran (,)) ↾_t 𝐴) ∈ Conn → ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴))
4		n0 4346	. . . . . . . . 9 ⊢ ((𝑢 ∩ 𝐴) ≠ ∅ ↔ ∃𝑏 𝑏 ∈ (𝑢 ∩ 𝐴))
5		n0 4346	. . . . . . . . 9 ⊢ ((𝑣 ∩ 𝐴) ≠ ∅ ↔ ∃𝑐 𝑐 ∈ (𝑣 ∩ 𝐴))
6	4, 5	anbi12i 627	. . . . . . . 8 ⊢ (((𝑢 ∩ 𝐴) ≠ ∅ ∧ (𝑣 ∩ 𝐴) ≠ ∅) ↔ (∃𝑏 𝑏 ∈ (𝑢 ∩ 𝐴) ∧ ∃𝑐 𝑐 ∈ (𝑣 ∩ 𝐴)))
7		exdistrv 1959	. . . . . . . . 9 ⊢ (∃𝑏∃𝑐(𝑏 ∈ (𝑢 ∩ 𝐴) ∧ 𝑐 ∈ (𝑣 ∩ 𝐴)) ↔ (∃𝑏 𝑏 ∈ (𝑢 ∩ 𝐴) ∧ ∃𝑐 𝑐 ∈ (𝑣 ∩ 𝐴)))
8		simplll 773	. . . . . . . . . . . . 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 777	. . . . . . . . . . . . . 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 4199	. . . . . . . . . . . . 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 3983	. . . . . . . . . . . 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 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))) → 𝑐 ∈ (𝑣 ∩ 𝐴))
13	12	elin2d 4199	. . . . . . . . . . . . 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 3983	. . . . . . . . . . . 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 481	. . . . . . . . . . . . 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 775	. . . . . . . . . . . . . 14 ⊢ (((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) → 𝑢 ∈ (topGen‘ran (,)))
17	16	ad2antrr 724	. . . . . . . . . . . . 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 776	. . . . . . . . . . . . . 14 ⊢ (((𝐴 ⊆ ℝ ∧ (𝑢 ∈ (topGen‘ran (,)) ∧ 𝑣 ∈ (topGen‘ran (,)))) ∧ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴) → 𝑣 ∈ (topGen‘ran (,)))
19	18	ad2antrr 724	. . . . . . . . . . . . 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 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))) ∧ 𝑏 ≤ 𝑐) → ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 (𝑥[,]𝑦) ⊆ 𝐴)
21	9	adantr 481	. . . . . . . . . . . . 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 481	. . . . . . . . . . . . 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 776	. . . . . . . . . . . . 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 485	. . . . . . . . . . . . 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 2732	. . . . . . . . . . . . 13 ⊢ sup((𝑢 ∩ (𝑏[,]𝑐)), ℝ, < ) = sup((𝑢 ∩ (𝑏[,]𝑐)), ℝ, < )
26	15, 17, 19, 20, 21, 22, 23, 24, 25	reconnlem2 24342	. . . . . . . . . . . 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 481	. . . . . . . . . . . . . 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 724	. . . . . . . . . . . . . 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 724	. . . . . . . . . . . . . 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 774	. . . . . . . . . . . . . 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 481	. . . . . . . . . . . . . 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 481	. . . . . . . . . . . . . 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 4201	. . . . . . . . . . . . . . 15 ⊢ (𝑣 ∩ 𝑢) = (𝑢 ∩ 𝑣)
34		simplrr 776	. . . . . . . . . . . . . . 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 4030	. . . . . . . . . . . . . 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 485	. . . . . . . . . . . . . 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 2732	. . . . . . . . . . . . . 14 ⊢ sup((𝑣 ∩ (𝑐[,]𝑏)), ℝ, < ) = sup((𝑣 ∩ (𝑐[,]𝑏)), ℝ, < )
38	27, 28, 29, 30, 31, 32, 35, 36, 37	reconnlem2 24342	. . . . . . . . . . . . 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 4153	. . . . . . . . . . . . . 14 ⊢ (𝑣 ∪ 𝑢) = (𝑢 ∪ 𝑣)
40	39	sseq2i 4011	. . . . . . . . . . . . 13 ⊢ (𝐴 ⊆ (𝑣 ∪ 𝑢) ↔ 𝐴 ⊆ (𝑢 ∪ 𝑣))
41	38, 40	sylnib 327	. . . . . . . . . . . 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 11319	. . . . . . . . . . 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 421	. . . . . . . . . 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 1937	. . . . . . . . 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 416	. . . . . 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 1348	. . . . 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 413	. . . 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 3209	. . 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 24279	. . . 4 ⊢ (topGen‘ran (,)) ∈ (TopOn‘ℝ)
52		connsub 22924	. . . 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 688	. . 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 258	. 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 396 ∧ w3a 1087 ∃wex 1781 ∈ wcel 2106 ≠ wne 2940 ∀wral 3061 ∖ cdif 3945 ∪ cun 3946 ∩ cin 3947 ⊆ wss 3948 ∅c0 4322 class class class wbr 5148 ran crn 5677 ‘cfv 6543 (class class class)co 7408 supcsup 9434 ℝcr 11108 < clt 11247 ≤ cle 11248 (,)cioo 13323 [,]cicc 13326 ↾_t crest 17365 topGenctg 17382 TopOnctopon 22411 Conncconn 22914

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-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-er 8702 df-map 8821 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-n0 12472 df-z 12558 df-uz 12822 df-q 12932 df-rp 12974 df-xneg 13091 df-xadd 13092 df-xmul 13093 df-ioo 13327 df-ico 13329 df-icc 13330 df-seq 13966 df-exp 14027 df-cj 15045 df-re 15046 df-im 15047 df-sqrt 15181 df-abs 15182 df-rest 17367 df-topgen 17388 df-psmet 20935 df-xmet 20936 df-met 20937 df-bl 20938 df-mopn 20939 df-top 22395 df-topon 22412 df-bases 22448 df-cld 22522 df-conn 22915

This theorem is referenced by: retopconn 24344 iccconn 24345 resconn 34232 ioosconn 34233 iccllysconn 34236 ivthALT 35215

W3C validator