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Mirrors > Home > ILE Home > Th. List > tpstop | GIF version |
Description: The topology extractor on a topological space is a topology. (Contributed by FL, 27-Jun-2014.) |
Ref | Expression |
---|---|
tpstop.j | ⊢ 𝐽 = (TopOpen‘𝐾) |
Ref | Expression |
---|---|
tpstop | ⊢ (𝐾 ∈ TopSp → 𝐽 ∈ Top) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2171 | . . 3 ⊢ (Base‘𝐾) = (Base‘𝐾) | |
2 | tpstop.j | . . 3 ⊢ 𝐽 = (TopOpen‘𝐾) | |
3 | 1, 2 | istps2 12942 | . 2 ⊢ (𝐾 ∈ TopSp ↔ (𝐽 ∈ Top ∧ (Base‘𝐾) = ∪ 𝐽)) |
4 | 3 | simplbi 272 | 1 ⊢ (𝐾 ∈ TopSp → 𝐽 ∈ Top) |
Colors of variables: wff set class |
Syntax hints: → wi 4 = wceq 1349 ∈ wcel 2142 ∪ cuni 3797 ‘cfv 5200 Basecbs 12420 TopOpenctopn 12602 Topctop 12906 TopSpctps 12939 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 610 ax-in2 611 ax-io 705 ax-5 1441 ax-7 1442 ax-gen 1443 ax-ie1 1487 ax-ie2 1488 ax-8 1498 ax-10 1499 ax-11 1500 ax-i12 1501 ax-bndl 1503 ax-4 1504 ax-17 1520 ax-i9 1524 ax-ial 1528 ax-i5r 1529 ax-13 2144 ax-14 2145 ax-ext 2153 ax-coll 4105 ax-sep 4108 ax-pow 4161 ax-pr 4195 ax-un 4419 ax-cnex 7869 ax-resscn 7870 ax-1re 7872 ax-addrcl 7875 |
This theorem depends on definitions: df-bi 116 df-3an 976 df-tru 1352 df-fal 1355 df-nf 1455 df-sb 1757 df-eu 2023 df-mo 2024 df-clab 2158 df-cleq 2164 df-clel 2167 df-nfc 2302 df-ral 2454 df-rex 2455 df-reu 2456 df-rab 2458 df-v 2733 df-sbc 2957 df-csb 3051 df-dif 3124 df-un 3126 df-in 3128 df-ss 3135 df-nul 3416 df-pw 3569 df-sn 3590 df-pr 3591 df-op 3593 df-uni 3798 df-int 3833 df-iun 3876 df-br 3991 df-opab 4052 df-mpt 4053 df-id 4279 df-xp 4618 df-rel 4619 df-cnv 4620 df-co 4621 df-dm 4622 df-rn 4623 df-res 4624 df-ima 4625 df-iota 5162 df-fun 5202 df-fn 5203 df-f 5204 df-f1 5205 df-fo 5206 df-f1o 5207 df-fv 5208 df-ov 5860 df-oprab 5861 df-mpo 5862 df-1st 6123 df-2nd 6124 df-inn 8883 df-2 8941 df-3 8942 df-4 8943 df-5 8944 df-6 8945 df-7 8946 df-8 8947 df-9 8948 df-ndx 12423 df-slot 12424 df-base 12426 df-tset 12503 df-rest 12603 df-topn 12604 df-top 12907 df-topon 12920 df-topsp 12940 |
This theorem is referenced by: (None) |
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