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| Mirrors > Home > ILE Home > Th. List > distps | GIF version | ||
| Description: The discrete topology on a set 𝐴 expressed as a topological space. (Contributed by FL, 20-Aug-2006.) |
| Ref | Expression |
|---|---|
| distps.a | ⊢ 𝐴 ∈ V |
| distps.k | ⊢ 𝐾 = {〈(Base‘ndx), 𝐴〉, 〈(TopSet‘ndx), 𝒫 𝐴〉} |
| Ref | Expression |
|---|---|
| distps | ⊢ 𝐾 ∈ TopSp |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | distps.k | . 2 ⊢ 𝐾 = {〈(Base‘ndx), 𝐴〉, 〈(TopSet‘ndx), 𝒫 𝐴〉} | |
| 2 | unipw 4303 | . . 3 ⊢ ∪ 𝒫 𝐴 = 𝐴 | |
| 3 | 2 | eqcomi 2233 | . 2 ⊢ 𝐴 = ∪ 𝒫 𝐴 |
| 4 | distps.a | . . 3 ⊢ 𝐴 ∈ V | |
| 5 | distop 14774 | . . 3 ⊢ (𝐴 ∈ V → 𝒫 𝐴 ∈ Top) | |
| 6 | 4, 5 | ax-mp 5 | . 2 ⊢ 𝒫 𝐴 ∈ Top |
| 7 | 1, 3, 6 | eltpsi 14730 | 1 ⊢ 𝐾 ∈ TopSp |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1395 ∈ wcel 2200 Vcvv 2799 𝒫 cpw 3649 {cpr 3667 〈cop 3669 ∪ cuni 3888 ‘cfv 5318 ndxcnx 13044 Basecbs 13047 TopSetcts 13131 Topctop 14686 TopSpctps 14719 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-coll 4199 ax-sep 4202 ax-pow 4258 ax-pr 4293 ax-un 4524 ax-setind 4629 ax-cnex 8101 ax-resscn 8102 ax-1cn 8103 ax-1re 8104 ax-icn 8105 ax-addcl 8106 ax-addrcl 8107 ax-mulcl 8108 ax-addcom 8110 ax-addass 8112 ax-i2m1 8115 ax-0lt1 8116 ax-0id 8118 ax-rnegex 8119 ax-pre-ltirr 8122 ax-pre-lttrn 8124 ax-pre-ltadd 8126 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-nel 2496 df-ral 2513 df-rex 2514 df-reu 2515 df-rab 2517 df-v 2801 df-sbc 3029 df-csb 3125 df-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-nul 3492 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-int 3924 df-iun 3967 df-br 4084 df-opab 4146 df-mpt 4147 df-id 4384 df-xp 4725 df-rel 4726 df-cnv 4727 df-co 4728 df-dm 4729 df-rn 4730 df-res 4731 df-ima 4732 df-iota 5278 df-fun 5320 df-fn 5321 df-f 5322 df-f1 5323 df-fo 5324 df-f1o 5325 df-fv 5326 df-ov 6010 df-oprab 6011 df-mpo 6012 df-1st 6292 df-2nd 6293 df-pnf 8194 df-mnf 8195 df-ltxr 8197 df-inn 9122 df-2 9180 df-3 9181 df-4 9182 df-5 9183 df-6 9184 df-7 9185 df-8 9186 df-9 9187 df-ndx 13050 df-slot 13051 df-base 13053 df-tset 13144 df-rest 13289 df-topn 13290 df-top 14687 df-topon 14700 df-topsp 14720 |
| This theorem is referenced by: (None) |
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