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Mirrors > Home > MPE Home > Th. List > cmpkgen | Structured version Visualization version GIF version |
Description: A compact space is compactly generated. (Contributed by Mario Carneiro, 21-Mar-2015.) |
Ref | Expression |
---|---|
cmpkgen | ⊢ (𝐽 ∈ Comp → 𝐽 ∈ ran 𝑘Gen) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2821 | . 2 ⊢ ∪ 𝐽 = ∪ 𝐽 | |
2 | cmptop 22002 | . 2 ⊢ (𝐽 ∈ Comp → 𝐽 ∈ Top) | |
3 | 2 | adantr 483 | . . . 4 ⊢ ((𝐽 ∈ Comp ∧ 𝑥 ∈ ∪ 𝐽) → 𝐽 ∈ Top) |
4 | 1 | topopn 21513 | . . . . 5 ⊢ (𝐽 ∈ Top → ∪ 𝐽 ∈ 𝐽) |
5 | 3, 4 | syl 17 | . . . 4 ⊢ ((𝐽 ∈ Comp ∧ 𝑥 ∈ ∪ 𝐽) → ∪ 𝐽 ∈ 𝐽) |
6 | simpr 487 | . . . . 5 ⊢ ((𝐽 ∈ Comp ∧ 𝑥 ∈ ∪ 𝐽) → 𝑥 ∈ ∪ 𝐽) | |
7 | 6 | snssd 4741 | . . . 4 ⊢ ((𝐽 ∈ Comp ∧ 𝑥 ∈ ∪ 𝐽) → {𝑥} ⊆ ∪ 𝐽) |
8 | opnneiss 21725 | . . . 4 ⊢ ((𝐽 ∈ Top ∧ ∪ 𝐽 ∈ 𝐽 ∧ {𝑥} ⊆ ∪ 𝐽) → ∪ 𝐽 ∈ ((nei‘𝐽)‘{𝑥})) | |
9 | 3, 5, 7, 8 | syl3anc 1367 | . . 3 ⊢ ((𝐽 ∈ Comp ∧ 𝑥 ∈ ∪ 𝐽) → ∪ 𝐽 ∈ ((nei‘𝐽)‘{𝑥})) |
10 | 1 | restid 16706 | . . . . 5 ⊢ (𝐽 ∈ Top → (𝐽 ↾t ∪ 𝐽) = 𝐽) |
11 | 3, 10 | syl 17 | . . . 4 ⊢ ((𝐽 ∈ Comp ∧ 𝑥 ∈ ∪ 𝐽) → (𝐽 ↾t ∪ 𝐽) = 𝐽) |
12 | simpl 485 | . . . 4 ⊢ ((𝐽 ∈ Comp ∧ 𝑥 ∈ ∪ 𝐽) → 𝐽 ∈ Comp) | |
13 | 11, 12 | eqeltrd 2913 | . . 3 ⊢ ((𝐽 ∈ Comp ∧ 𝑥 ∈ ∪ 𝐽) → (𝐽 ↾t ∪ 𝐽) ∈ Comp) |
14 | oveq2 7163 | . . . . 5 ⊢ (𝑘 = ∪ 𝐽 → (𝐽 ↾t 𝑘) = (𝐽 ↾t ∪ 𝐽)) | |
15 | 14 | eleq1d 2897 | . . . 4 ⊢ (𝑘 = ∪ 𝐽 → ((𝐽 ↾t 𝑘) ∈ Comp ↔ (𝐽 ↾t ∪ 𝐽) ∈ Comp)) |
16 | 15 | rspcev 3622 | . . 3 ⊢ ((∪ 𝐽 ∈ ((nei‘𝐽)‘{𝑥}) ∧ (𝐽 ↾t ∪ 𝐽) ∈ Comp) → ∃𝑘 ∈ ((nei‘𝐽)‘{𝑥})(𝐽 ↾t 𝑘) ∈ Comp) |
17 | 9, 13, 16 | syl2anc 586 | . 2 ⊢ ((𝐽 ∈ Comp ∧ 𝑥 ∈ ∪ 𝐽) → ∃𝑘 ∈ ((nei‘𝐽)‘{𝑥})(𝐽 ↾t 𝑘) ∈ Comp) |
18 | 1, 2, 17 | llycmpkgen2 22157 | 1 ⊢ (𝐽 ∈ Comp → 𝐽 ∈ ran 𝑘Gen) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 = wceq 1533 ∈ wcel 2110 ∃wrex 3139 ⊆ wss 3935 {csn 4566 ∪ cuni 4837 ran crn 5555 ‘cfv 6354 (class class class)co 7155 ↾t crest 16693 Topctop 21500 neicnei 21704 Compccmp 21993 𝑘Genckgen 22140 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 ax-rep 5189 ax-sep 5202 ax-nul 5209 ax-pow 5265 ax-pr 5329 ax-un 7460 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-ral 3143 df-rex 3144 df-reu 3145 df-rab 3147 df-v 3496 df-sbc 3772 df-csb 3883 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-pss 3953 df-nul 4291 df-if 4467 df-pw 4540 df-sn 4567 df-pr 4569 df-tp 4571 df-op 4573 df-uni 4838 df-int 4876 df-iun 4920 df-br 5066 df-opab 5128 df-mpt 5146 df-tr 5172 df-id 5459 df-eprel 5464 df-po 5473 df-so 5474 df-fr 5513 df-we 5515 df-xp 5560 df-rel 5561 df-cnv 5562 df-co 5563 df-dm 5564 df-rn 5565 df-res 5566 df-ima 5567 df-pred 6147 df-ord 6193 df-on 6194 df-lim 6195 df-suc 6196 df-iota 6313 df-fun 6356 df-fn 6357 df-f 6358 df-f1 6359 df-fo 6360 df-f1o 6361 df-fv 6362 df-ov 7158 df-oprab 7159 df-mpo 7160 df-om 7580 df-1st 7688 df-2nd 7689 df-wrecs 7946 df-recs 8007 df-rdg 8045 df-oadd 8105 df-er 8288 df-en 8509 df-fin 8512 df-fi 8874 df-rest 16695 df-topgen 16716 df-top 21501 df-topon 21518 df-bases 21553 df-ntr 21627 df-nei 21705 df-cmp 21994 df-kgen 22141 |
This theorem is referenced by: (None) |
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