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| Mirrors > Home > MPE Home > Th. List > topnfn | Structured version Visualization version GIF version | ||
| Description: The topology extractor function is a function on the universe. (Contributed by Mario Carneiro, 13-Aug-2015.) |
| Ref | Expression |
|---|---|
| topnfn | ⊢ TopOpen Fn V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ovex 7379 | . 2 ⊢ ((TopSet‘𝑤) ↾t (Base‘𝑤)) ∈ V | |
| 2 | df-topn 17327 | . 2 ⊢ TopOpen = (𝑤 ∈ V ↦ ((TopSet‘𝑤) ↾t (Base‘𝑤))) | |
| 3 | 1, 2 | fnmpti 6624 | 1 ⊢ TopOpen Fn V |
| Colors of variables: wff setvar class |
| Syntax hints: Vcvv 3436 Fn wfn 6476 ‘cfv 6481 (class class class)co 7346 Basecbs 17120 TopSetcts 17167 ↾t crest 17324 TopOpenctopn 17325 |
| 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 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-sep 5232 ax-nul 5242 ax-pr 5368 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-ral 3048 df-rex 3057 df-rab 3396 df-v 3438 df-dif 3900 df-un 3902 df-ss 3914 df-nul 4281 df-if 4473 df-sn 4574 df-pr 4576 df-op 4580 df-uni 4857 df-br 5090 df-opab 5152 df-mpt 5171 df-id 5509 df-xp 5620 df-rel 5621 df-cnv 5622 df-co 5623 df-dm 5624 df-iota 6437 df-fun 6483 df-fn 6484 df-fv 6489 df-ov 7349 df-topn 17327 |
| This theorem is referenced by: prdstopn 23543 prdstps 23544 xpstopnlem2 23726 prdstmdd 24039 prdstgpd 24040 prdsxmslem2 24444 |
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