Metamath Proof Explorer < Previous   Next > Nearby theorems Mirrors  >  Home  >  MPE Home  >  Th. List  >  islly2 Structured version   Visualization version   GIF version

Theorem islly2 21097
 Description: An alternative expression for 𝐽 ∈ Locally 𝐴 when 𝐴 passes to open subspaces: A space is locally 𝐴 if every point is contained in an open neighborhood with property 𝐴. (Contributed by Mario Carneiro, 2-Mar-2015.)
Hypotheses
Ref Expression
restlly.1 ((𝜑 ∧ (𝑗𝐴𝑥𝑗)) → (𝑗t 𝑥) ∈ 𝐴)
islly2.2 𝑋 = 𝐽
Assertion
Ref Expression
islly2 (𝜑 → (𝐽 ∈ Locally 𝐴 ↔ (𝐽 ∈ Top ∧ ∀𝑦𝑋𝑢𝐽 (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))))
Distinct variable groups:   𝑢,𝑗,𝑥,𝑦,𝐴   𝑗,𝐽,𝑢,𝑥,𝑦   𝜑,𝑗,𝑢,𝑥,𝑦   𝑢,𝑋,𝑦
Allowed substitution hints:   𝑋(𝑥,𝑗)

Proof of Theorem islly2
Dummy variables 𝑣 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 llytop 21085 . . . 4 (𝐽 ∈ Locally 𝐴𝐽 ∈ Top)
21adantl 481 . . 3 ((𝜑𝐽 ∈ Locally 𝐴) → 𝐽 ∈ Top)
3 simplr 788 . . . . . 6 (((𝜑𝐽 ∈ Locally 𝐴) ∧ 𝑦𝑋) → 𝐽 ∈ Locally 𝐴)
42adantr 480 . . . . . . 7 (((𝜑𝐽 ∈ Locally 𝐴) ∧ 𝑦𝑋) → 𝐽 ∈ Top)
5 islly2.2 . . . . . . . 8 𝑋 = 𝐽
65topopn 20536 . . . . . . 7 (𝐽 ∈ Top → 𝑋𝐽)
74, 6syl 17 . . . . . 6 (((𝜑𝐽 ∈ Locally 𝐴) ∧ 𝑦𝑋) → 𝑋𝐽)
8 simpr 476 . . . . . 6 (((𝜑𝐽 ∈ Locally 𝐴) ∧ 𝑦𝑋) → 𝑦𝑋)
9 llyi 21087 . . . . . 6 ((𝐽 ∈ Locally 𝐴𝑋𝐽𝑦𝑋) → ∃𝑢𝐽 (𝑢𝑋𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))
103, 7, 8, 9syl3anc 1318 . . . . 5 (((𝜑𝐽 ∈ Locally 𝐴) ∧ 𝑦𝑋) → ∃𝑢𝐽 (𝑢𝑋𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))
11 3simpc 1053 . . . . . 6 ((𝑢𝑋𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴) → (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))
1211reximi 2994 . . . . 5 (∃𝑢𝐽 (𝑢𝑋𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴) → ∃𝑢𝐽 (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))
1310, 12syl 17 . . . 4 (((𝜑𝐽 ∈ Locally 𝐴) ∧ 𝑦𝑋) → ∃𝑢𝐽 (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))
1413ralrimiva 2949 . . 3 ((𝜑𝐽 ∈ Locally 𝐴) → ∀𝑦𝑋𝑢𝐽 (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))
152, 14jca 553 . 2 ((𝜑𝐽 ∈ Locally 𝐴) → (𝐽 ∈ Top ∧ ∀𝑦𝑋𝑢𝐽 (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴)))
16 simprl 790 . . 3 ((𝜑 ∧ (𝐽 ∈ Top ∧ ∀𝑦𝑋𝑢𝐽 (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))) → 𝐽 ∈ Top)
17 elssuni 4403 . . . . . . . . 9 (𝑧𝐽𝑧 𝐽)
1817, 5syl6sseqr 3615 . . . . . . . 8 (𝑧𝐽𝑧𝑋)
1918adantl 481 . . . . . . 7 (((𝜑𝐽 ∈ Top) ∧ 𝑧𝐽) → 𝑧𝑋)
20 ssralv 3629 . . . . . . 7 (𝑧𝑋 → (∀𝑦𝑋𝑢𝐽 (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴) → ∀𝑦𝑧𝑢𝐽 (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴)))
2119, 20syl 17 . . . . . 6 (((𝜑𝐽 ∈ Top) ∧ 𝑧𝐽) → (∀𝑦𝑋𝑢𝐽 (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴) → ∀𝑦𝑧𝑢𝐽 (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴)))
22 simpllr 795 . . . . . . . . . . . 12 ((((𝜑𝐽 ∈ Top) ∧ (𝑧𝐽𝑦𝑧)) ∧ (𝑢𝐽 ∧ (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))) → 𝐽 ∈ Top)
23 simplrl 796 . . . . . . . . . . . 12 ((((𝜑𝐽 ∈ Top) ∧ (𝑧𝐽𝑦𝑧)) ∧ (𝑢𝐽 ∧ (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))) → 𝑧𝐽)
24 simprl 790 . . . . . . . . . . . 12 ((((𝜑𝐽 ∈ Top) ∧ (𝑧𝐽𝑦𝑧)) ∧ (𝑢𝐽 ∧ (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))) → 𝑢𝐽)
25 inopn 20529 . . . . . . . . . . . 12 ((𝐽 ∈ Top ∧ 𝑧𝐽𝑢𝐽) → (𝑧𝑢) ∈ 𝐽)
2622, 23, 24, 25syl3anc 1318 . . . . . . . . . . 11 ((((𝜑𝐽 ∈ Top) ∧ (𝑧𝐽𝑦𝑧)) ∧ (𝑢𝐽 ∧ (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))) → (𝑧𝑢) ∈ 𝐽)
27 inss1 3795 . . . . . . . . . . . . 13 (𝑧𝑢) ⊆ 𝑧
28 vex 3176 . . . . . . . . . . . . . 14 𝑧 ∈ V
2928elpw2 4755 . . . . . . . . . . . . 13 ((𝑧𝑢) ∈ 𝒫 𝑧 ↔ (𝑧𝑢) ⊆ 𝑧)
3027, 29mpbir 220 . . . . . . . . . . . 12 (𝑧𝑢) ∈ 𝒫 𝑧
3130a1i 11 . . . . . . . . . . 11 ((((𝜑𝐽 ∈ Top) ∧ (𝑧𝐽𝑦𝑧)) ∧ (𝑢𝐽 ∧ (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))) → (𝑧𝑢) ∈ 𝒫 𝑧)
3226, 31elind 3760 . . . . . . . . . 10 ((((𝜑𝐽 ∈ Top) ∧ (𝑧𝐽𝑦𝑧)) ∧ (𝑢𝐽 ∧ (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))) → (𝑧𝑢) ∈ (𝐽 ∩ 𝒫 𝑧))
33 simplrr 797 . . . . . . . . . . 11 ((((𝜑𝐽 ∈ Top) ∧ (𝑧𝐽𝑦𝑧)) ∧ (𝑢𝐽 ∧ (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))) → 𝑦𝑧)
34 simprrl 800 . . . . . . . . . . 11 ((((𝜑𝐽 ∈ Top) ∧ (𝑧𝐽𝑦𝑧)) ∧ (𝑢𝐽 ∧ (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))) → 𝑦𝑢)
3533, 34elind 3760 . . . . . . . . . 10 ((((𝜑𝐽 ∈ Top) ∧ (𝑧𝐽𝑦𝑧)) ∧ (𝑢𝐽 ∧ (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))) → 𝑦 ∈ (𝑧𝑢))
36 inss2 3796 . . . . . . . . . . . . 13 (𝑧𝑢) ⊆ 𝑢
3736a1i 11 . . . . . . . . . . . 12 ((((𝜑𝐽 ∈ Top) ∧ (𝑧𝐽𝑦𝑧)) ∧ (𝑢𝐽 ∧ (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))) → (𝑧𝑢) ⊆ 𝑢)
38 restabs 20779 . . . . . . . . . . . 12 ((𝐽 ∈ Top ∧ (𝑧𝑢) ⊆ 𝑢𝑢𝐽) → ((𝐽t 𝑢) ↾t (𝑧𝑢)) = (𝐽t (𝑧𝑢)))
3922, 37, 24, 38syl3anc 1318 . . . . . . . . . . 11 ((((𝜑𝐽 ∈ Top) ∧ (𝑧𝐽𝑦𝑧)) ∧ (𝑢𝐽 ∧ (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))) → ((𝐽t 𝑢) ↾t (𝑧𝑢)) = (𝐽t (𝑧𝑢)))
40 elrestr 15912 . . . . . . . . . . . . 13 ((𝐽 ∈ Top ∧ 𝑢𝐽𝑧𝐽) → (𝑧𝑢) ∈ (𝐽t 𝑢))
4122, 24, 23, 40syl3anc 1318 . . . . . . . . . . . 12 ((((𝜑𝐽 ∈ Top) ∧ (𝑧𝐽𝑦𝑧)) ∧ (𝑢𝐽 ∧ (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))) → (𝑧𝑢) ∈ (𝐽t 𝑢))
42 simprrr 801 . . . . . . . . . . . . 13 ((((𝜑𝐽 ∈ Top) ∧ (𝑧𝐽𝑦𝑧)) ∧ (𝑢𝐽 ∧ (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))) → (𝐽t 𝑢) ∈ 𝐴)
43 restlly.1 . . . . . . . . . . . . . . 15 ((𝜑 ∧ (𝑗𝐴𝑥𝑗)) → (𝑗t 𝑥) ∈ 𝐴)
4443ralrimivva 2954 . . . . . . . . . . . . . 14 (𝜑 → ∀𝑗𝐴𝑥𝑗 (𝑗t 𝑥) ∈ 𝐴)
4544ad3antrrr 762 . . . . . . . . . . . . 13 ((((𝜑𝐽 ∈ Top) ∧ (𝑧𝐽𝑦𝑧)) ∧ (𝑢𝐽 ∧ (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))) → ∀𝑗𝐴𝑥𝑗 (𝑗t 𝑥) ∈ 𝐴)
46 oveq1 6556 . . . . . . . . . . . . . . . 16 (𝑗 = (𝐽t 𝑢) → (𝑗t 𝑥) = ((𝐽t 𝑢) ↾t 𝑥))
4746eleq1d 2672 . . . . . . . . . . . . . . 15 (𝑗 = (𝐽t 𝑢) → ((𝑗t 𝑥) ∈ 𝐴 ↔ ((𝐽t 𝑢) ↾t 𝑥) ∈ 𝐴))
4847raleqbi1dv 3123 . . . . . . . . . . . . . 14 (𝑗 = (𝐽t 𝑢) → (∀𝑥𝑗 (𝑗t 𝑥) ∈ 𝐴 ↔ ∀𝑥 ∈ (𝐽t 𝑢)((𝐽t 𝑢) ↾t 𝑥) ∈ 𝐴))
4948rspcv 3278 . . . . . . . . . . . . 13 ((𝐽t 𝑢) ∈ 𝐴 → (∀𝑗𝐴𝑥𝑗 (𝑗t 𝑥) ∈ 𝐴 → ∀𝑥 ∈ (𝐽t 𝑢)((𝐽t 𝑢) ↾t 𝑥) ∈ 𝐴))
5042, 45, 49sylc 63 . . . . . . . . . . . 12 ((((𝜑𝐽 ∈ Top) ∧ (𝑧𝐽𝑦𝑧)) ∧ (𝑢𝐽 ∧ (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))) → ∀𝑥 ∈ (𝐽t 𝑢)((𝐽t 𝑢) ↾t 𝑥) ∈ 𝐴)
51 oveq2 6557 . . . . . . . . . . . . . 14 (𝑥 = (𝑧𝑢) → ((𝐽t 𝑢) ↾t 𝑥) = ((𝐽t 𝑢) ↾t (𝑧𝑢)))
5251eleq1d 2672 . . . . . . . . . . . . 13 (𝑥 = (𝑧𝑢) → (((𝐽t 𝑢) ↾t 𝑥) ∈ 𝐴 ↔ ((𝐽t 𝑢) ↾t (𝑧𝑢)) ∈ 𝐴))
5352rspcv 3278 . . . . . . . . . . . 12 ((𝑧𝑢) ∈ (𝐽t 𝑢) → (∀𝑥 ∈ (𝐽t 𝑢)((𝐽t 𝑢) ↾t 𝑥) ∈ 𝐴 → ((𝐽t 𝑢) ↾t (𝑧𝑢)) ∈ 𝐴))
5441, 50, 53sylc 63 . . . . . . . . . . 11 ((((𝜑𝐽 ∈ Top) ∧ (𝑧𝐽𝑦𝑧)) ∧ (𝑢𝐽 ∧ (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))) → ((𝐽t 𝑢) ↾t (𝑧𝑢)) ∈ 𝐴)
5539, 54eqeltrrd 2689 . . . . . . . . . 10 ((((𝜑𝐽 ∈ Top) ∧ (𝑧𝐽𝑦𝑧)) ∧ (𝑢𝐽 ∧ (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))) → (𝐽t (𝑧𝑢)) ∈ 𝐴)
56 eleq2 2677 . . . . . . . . . . . 12 (𝑣 = (𝑧𝑢) → (𝑦𝑣𝑦 ∈ (𝑧𝑢)))
57 oveq2 6557 . . . . . . . . . . . . 13 (𝑣 = (𝑧𝑢) → (𝐽t 𝑣) = (𝐽t (𝑧𝑢)))
5857eleq1d 2672 . . . . . . . . . . . 12 (𝑣 = (𝑧𝑢) → ((𝐽t 𝑣) ∈ 𝐴 ↔ (𝐽t (𝑧𝑢)) ∈ 𝐴))
5956, 58anbi12d 743 . . . . . . . . . . 11 (𝑣 = (𝑧𝑢) → ((𝑦𝑣 ∧ (𝐽t 𝑣) ∈ 𝐴) ↔ (𝑦 ∈ (𝑧𝑢) ∧ (𝐽t (𝑧𝑢)) ∈ 𝐴)))
6059rspcev 3282 . . . . . . . . . 10 (((𝑧𝑢) ∈ (𝐽 ∩ 𝒫 𝑧) ∧ (𝑦 ∈ (𝑧𝑢) ∧ (𝐽t (𝑧𝑢)) ∈ 𝐴)) → ∃𝑣 ∈ (𝐽 ∩ 𝒫 𝑧)(𝑦𝑣 ∧ (𝐽t 𝑣) ∈ 𝐴))
6132, 35, 55, 60syl12anc 1316 . . . . . . . . 9 ((((𝜑𝐽 ∈ Top) ∧ (𝑧𝐽𝑦𝑧)) ∧ (𝑢𝐽 ∧ (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))) → ∃𝑣 ∈ (𝐽 ∩ 𝒫 𝑧)(𝑦𝑣 ∧ (𝐽t 𝑣) ∈ 𝐴))
6261rexlimdvaa 3014 . . . . . . . 8 (((𝜑𝐽 ∈ Top) ∧ (𝑧𝐽𝑦𝑧)) → (∃𝑢𝐽 (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴) → ∃𝑣 ∈ (𝐽 ∩ 𝒫 𝑧)(𝑦𝑣 ∧ (𝐽t 𝑣) ∈ 𝐴)))
6362anassrs 678 . . . . . . 7 ((((𝜑𝐽 ∈ Top) ∧ 𝑧𝐽) ∧ 𝑦𝑧) → (∃𝑢𝐽 (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴) → ∃𝑣 ∈ (𝐽 ∩ 𝒫 𝑧)(𝑦𝑣 ∧ (𝐽t 𝑣) ∈ 𝐴)))
6463ralimdva 2945 . . . . . 6 (((𝜑𝐽 ∈ Top) ∧ 𝑧𝐽) → (∀𝑦𝑧𝑢𝐽 (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴) → ∀𝑦𝑧𝑣 ∈ (𝐽 ∩ 𝒫 𝑧)(𝑦𝑣 ∧ (𝐽t 𝑣) ∈ 𝐴)))
6521, 64syld 46 . . . . 5 (((𝜑𝐽 ∈ Top) ∧ 𝑧𝐽) → (∀𝑦𝑋𝑢𝐽 (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴) → ∀𝑦𝑧𝑣 ∈ (𝐽 ∩ 𝒫 𝑧)(𝑦𝑣 ∧ (𝐽t 𝑣) ∈ 𝐴)))
6665ralrimdva 2952 . . . 4 ((𝜑𝐽 ∈ Top) → (∀𝑦𝑋𝑢𝐽 (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴) → ∀𝑧𝐽𝑦𝑧𝑣 ∈ (𝐽 ∩ 𝒫 𝑧)(𝑦𝑣 ∧ (𝐽t 𝑣) ∈ 𝐴)))
6766impr 647 . . 3 ((𝜑 ∧ (𝐽 ∈ Top ∧ ∀𝑦𝑋𝑢𝐽 (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))) → ∀𝑧𝐽𝑦𝑧𝑣 ∈ (𝐽 ∩ 𝒫 𝑧)(𝑦𝑣 ∧ (𝐽t 𝑣) ∈ 𝐴))
68 islly 21081 . . 3 (𝐽 ∈ Locally 𝐴 ↔ (𝐽 ∈ Top ∧ ∀𝑧𝐽𝑦𝑧𝑣 ∈ (𝐽 ∩ 𝒫 𝑧)(𝑦𝑣 ∧ (𝐽t 𝑣) ∈ 𝐴)))
6916, 67, 68sylanbrc 695 . 2 ((𝜑 ∧ (𝐽 ∈ Top ∧ ∀𝑦𝑋𝑢𝐽 (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))) → 𝐽 ∈ Locally 𝐴)
7015, 69impbida 873 1 (𝜑 → (𝐽 ∈ Locally 𝐴 ↔ (𝐽 ∈ Top ∧ ∀𝑦𝑋𝑢𝐽 (𝑦𝑢 ∧ (𝐽t 𝑢) ∈ 𝐴))))
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ↔ wb 195   ∧ wa 383   ∧ w3a 1031   = wceq 1475   ∈ wcel 1977  ∀wral 2896  ∃wrex 2897   ∩ cin 3539   ⊆ wss 3540  𝒫 cpw 4108  ∪ cuni 4372  (class class class)co 6549   ↾t crest 15904  Topctop 20517  Locally clly 21077 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-rep 4699  ax-sep 4709  ax-nul 4717  ax-pr 4833  ax-un 6847 This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-ral 2901  df-rex 2902  df-reu 2903  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-op 4132  df-uni 4373  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-id 4953  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-rest 15906  df-top 20521  df-lly 21079 This theorem is referenced by: (None)
 Copyright terms: Public domain W3C validator