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| Mirrors > Home > MPE Home > Th. List > distopon | Structured version Visualization version GIF version | ||
| Description: The discrete topology on a set 𝐴, with base set. (Contributed by Mario Carneiro, 13-Aug-2015.) |
| Ref | Expression |
|---|---|
| distopon | ⊢ (𝐴 ∈ 𝑉 → 𝒫 𝐴 ∈ (TopOn‘𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | distop 23055 | . 2 ⊢ (𝐴 ∈ 𝑉 → 𝒫 𝐴 ∈ Top) | |
| 2 | unipw 5417 | . . 3 ⊢ ∪ 𝒫 𝐴 = 𝐴 | |
| 3 | 2 | eqcomi 2771 | . 2 ⊢ 𝐴 = ∪ 𝒫 𝐴 |
| 4 | istopon 22972 | . 2 ⊢ (𝒫 𝐴 ∈ (TopOn‘𝐴) ↔ (𝒫 𝐴 ∈ Top ∧ 𝐴 = ∪ 𝒫 𝐴)) | |
| 5 | 1, 3, 4 | sylanblrc 599 | 1 ⊢ (𝐴 ∈ 𝑉 → 𝒫 𝐴 ∈ (TopOn‘𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1560 ∈ wcel 2142 𝒫 cpw 4555 ∪ cuni 4865 ‘cfv 6521 Topctop 22953 TopOnctopon 22970 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1815 ax-4 1829 ax-5 1930 ax-6 1987 ax-7 2028 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-sep 5246 ax-nul 5256 ax-pow 5322 ax-pr 5390 ax-un 7718 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1100 df-tru 1563 df-fal 1573 df-ex 1800 df-nf 1804 df-sb 2091 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3077 df-rex 3087 df-rab 3415 df-v 3456 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4481 df-pw 4557 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-mpt 5182 df-id 5542 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-iota 6477 df-fun 6523 df-fv 6529 df-top 22954 df-topon 22971 |
| This theorem is referenced by: sn0topon 23058 toponmre 23153 cndis 23351 txdis1cn 23695 xkofvcn 23744 distgp 24159 efmndtmd 24161 symgtgp 24166 cnfdmsn 46456 |
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