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Mirrors > Home > MPE Home > Th. List > sszcld | Structured version Visualization version GIF version |
Description: Every subset of the integers are closed in the topology on ℂ. (Contributed by Mario Carneiro, 6-Jul-2017.) |
Ref | Expression |
---|---|
recld2.1 | ⊢ 𝐽 = (TopOpen‘ℂfld) |
Ref | Expression |
---|---|
sszcld | ⊢ (𝐴 ⊆ ℤ → 𝐴 ∈ (Clsd‘𝐽)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | recld2.1 | . . 3 ⊢ 𝐽 = (TopOpen‘ℂfld) | |
2 | 1 | zcld2 23425 | . 2 ⊢ ℤ ∈ (Clsd‘𝐽) |
3 | id 22 | . . 3 ⊢ (𝐴 ⊆ ℤ → 𝐴 ⊆ ℤ) | |
4 | zex 11993 | . . . . 5 ⊢ ℤ ∈ V | |
5 | difss 4110 | . . . . 5 ⊢ (ℤ ∖ 𝐴) ⊆ ℤ | |
6 | 4, 5 | elpwi2 5251 | . . . 4 ⊢ (ℤ ∖ 𝐴) ∈ 𝒫 ℤ |
7 | 1 | zdis 23426 | . . . 4 ⊢ (𝐽 ↾t ℤ) = 𝒫 ℤ |
8 | 6, 7 | eleqtrri 2914 | . . 3 ⊢ (ℤ ∖ 𝐴) ∈ (𝐽 ↾t ℤ) |
9 | 1 | cnfldtopon 23393 | . . . . . 6 ⊢ 𝐽 ∈ (TopOn‘ℂ) |
10 | zsscn 11992 | . . . . . 6 ⊢ ℤ ⊆ ℂ | |
11 | resttopon 21771 | . . . . . 6 ⊢ ((𝐽 ∈ (TopOn‘ℂ) ∧ ℤ ⊆ ℂ) → (𝐽 ↾t ℤ) ∈ (TopOn‘ℤ)) | |
12 | 9, 10, 11 | mp2an 690 | . . . . 5 ⊢ (𝐽 ↾t ℤ) ∈ (TopOn‘ℤ) |
13 | 12 | topontopi 21525 | . . . 4 ⊢ (𝐽 ↾t ℤ) ∈ Top |
14 | 12 | toponunii 21526 | . . . . 5 ⊢ ℤ = ∪ (𝐽 ↾t ℤ) |
15 | 14 | iscld 21637 | . . . 4 ⊢ ((𝐽 ↾t ℤ) ∈ Top → (𝐴 ∈ (Clsd‘(𝐽 ↾t ℤ)) ↔ (𝐴 ⊆ ℤ ∧ (ℤ ∖ 𝐴) ∈ (𝐽 ↾t ℤ)))) |
16 | 13, 15 | ax-mp 5 | . . 3 ⊢ (𝐴 ∈ (Clsd‘(𝐽 ↾t ℤ)) ↔ (𝐴 ⊆ ℤ ∧ (ℤ ∖ 𝐴) ∈ (𝐽 ↾t ℤ))) |
17 | 3, 8, 16 | sylanblrc 592 | . 2 ⊢ (𝐴 ⊆ ℤ → 𝐴 ∈ (Clsd‘(𝐽 ↾t ℤ))) |
18 | restcldr 21784 | . 2 ⊢ ((ℤ ∈ (Clsd‘𝐽) ∧ 𝐴 ∈ (Clsd‘(𝐽 ↾t ℤ))) → 𝐴 ∈ (Clsd‘𝐽)) | |
19 | 2, 17, 18 | sylancr 589 | 1 ⊢ (𝐴 ⊆ ℤ → 𝐴 ∈ (Clsd‘𝐽)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 = wceq 1537 ∈ wcel 2114 Vcvv 3496 ∖ cdif 3935 ⊆ wss 3938 𝒫 cpw 4541 ‘cfv 6357 (class class class)co 7158 ℂcc 10537 ℤcz 11984 ↾t crest 16696 TopOpenctopn 16697 ℂfldccnfld 20547 Topctop 21503 TopOnctopon 21520 Clsdccld 21626 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-rep 5192 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 ax-cnex 10595 ax-resscn 10596 ax-1cn 10597 ax-icn 10598 ax-addcl 10599 ax-addrcl 10600 ax-mulcl 10601 ax-mulrcl 10602 ax-mulcom 10603 ax-addass 10604 ax-mulass 10605 ax-distr 10606 ax-i2m1 10607 ax-1ne0 10608 ax-1rid 10609 ax-rnegex 10610 ax-rrecex 10611 ax-cnre 10612 ax-pre-lttri 10613 ax-pre-lttrn 10614 ax-pre-ltadd 10615 ax-pre-mulgt0 10616 ax-pre-sup 10617 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-nel 3126 df-ral 3145 df-rex 3146 df-reu 3147 df-rmo 3148 df-rab 3149 df-v 3498 df-sbc 3775 df-csb 3886 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-pss 3956 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-tp 4574 df-op 4576 df-uni 4841 df-int 4879 df-iun 4923 df-iin 4924 df-br 5069 df-opab 5131 df-mpt 5149 df-tr 5175 df-id 5462 df-eprel 5467 df-po 5476 df-so 5477 df-fr 5516 df-we 5518 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-pred 6150 df-ord 6196 df-on 6197 df-lim 6198 df-suc 6199 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-f1 6362 df-fo 6363 df-f1o 6364 df-fv 6365 df-riota 7116 df-ov 7161 df-oprab 7162 df-mpo 7163 df-om 7583 df-1st 7691 df-2nd 7692 df-wrecs 7949 df-recs 8010 df-rdg 8048 df-1o 8104 df-oadd 8108 df-er 8291 df-map 8410 df-en 8512 df-dom 8513 df-sdom 8514 df-fin 8515 df-fi 8877 df-sup 8908 df-inf 8909 df-pnf 10679 df-mnf 10680 df-xr 10681 df-ltxr 10682 df-le 10683 df-sub 10874 df-neg 10875 df-div 11300 df-nn 11641 df-2 11703 df-3 11704 df-4 11705 df-5 11706 df-6 11707 df-7 11708 df-8 11709 df-9 11710 df-n0 11901 df-z 11985 df-dec 12102 df-uz 12247 df-q 12352 df-rp 12393 df-xneg 12510 df-xadd 12511 df-xmul 12512 df-ioo 12745 df-fz 12896 df-fl 13165 df-seq 13373 df-exp 13433 df-cj 14460 df-re 14461 df-im 14462 df-sqrt 14596 df-abs 14597 df-struct 16487 df-ndx 16488 df-slot 16489 df-base 16491 df-plusg 16580 df-mulr 16581 df-starv 16582 df-tset 16586 df-ple 16587 df-ds 16589 df-unif 16590 df-rest 16698 df-topn 16699 df-topgen 16719 df-psmet 20539 df-xmet 20540 df-met 20541 df-bl 20542 df-mopn 20543 df-cnfld 20548 df-top 21504 df-topon 21521 df-topsp 21543 df-bases 21556 df-cld 21629 df-xms 22932 df-ms 22933 |
This theorem is referenced by: lgamucov 25617 |
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