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| Mirrors > Home > MPE Home > Th. List > t1r0 | Structured version Visualization version GIF version | ||
| Description: A T1 space is R0. That is, the Kolmogorov quotient of a T1 space is also T1 (because they are homeomorphic). (Contributed by Mario Carneiro, 25-Aug-2015.) |
| Ref | Expression |
|---|---|
| t1r0 | ⊢ (𝐽 ∈ Fre → (KQ‘𝐽) ∈ Fre) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | t1t0 23671 | . . 3 ⊢ (𝐽 ∈ Fre → 𝐽 ∈ Kol2) | |
| 2 | kqhmph 24143 | . . 3 ⊢ (𝐽 ∈ Kol2 ↔ 𝐽 ≃ (KQ‘𝐽)) | |
| 3 | 1, 2 | sylib 221 | . 2 ⊢ (𝐽 ∈ Fre → 𝐽 ≃ (KQ‘𝐽)) |
| 4 | t1hmph 24115 | . 2 ⊢ (𝐽 ≃ (KQ‘𝐽) → (𝐽 ∈ Fre → (KQ‘𝐽) ∈ Fre)) | |
| 5 | 3, 4 | mpcom 39 | 1 ⊢ (𝐽 ∈ Fre → (KQ‘𝐽) ∈ Fre) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2144 class class class wbr 5102 ‘cfv 6538 Kol2ct0 23629 Frect1 23630 KQckq 24017 ≃ chmph 24078 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7751 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5545 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-ov 7423 df-oprab 7424 df-mpo 7425 df-1st 8001 df-2nd 8002 df-1o 8479 df-map 8852 df-topgen 17619 df-qtop 17684 df-top 23217 df-topon 23234 df-cld 23342 df-cn 23550 df-t0 23636 df-t1 23637 df-kq 24018 df-hmeo 24079 df-hmph 24080 |
| This theorem is used by: nrmreg 24148 |
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