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| Mirrors > Home > MPE Home > Th. List > toptopon | Structured version Visualization version GIF version | ||
| Description: Alternative definition of Top in terms of TopOn. (Contributed by Mario Carneiro, 13-Aug-2015.) |
| Ref | Expression |
|---|---|
| toptopon.1 | ⊢ 𝑋 = ∪ 𝐽 |
| Ref | Expression |
|---|---|
| toptopon | ⊢ (𝐽 ∈ Top ↔ 𝐽 ∈ (TopOn‘𝑋)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | toptopon.1 | . . 3 ⊢ 𝑋 = ∪ 𝐽 | |
| 2 | istopon 23138 | . . 3 ⊢ (𝐽 ∈ (TopOn‘𝑋) ↔ (𝐽 ∈ Top ∧ 𝑋 = ∪ 𝐽)) | |
| 3 | 1, 2 | mpbiran2 723 | . 2 ⊢ (𝐽 ∈ (TopOn‘𝑋) ↔ 𝐽 ∈ Top) |
| 4 | 3 | bicomi 227 | 1 ⊢ (𝐽 ∈ Top ↔ 𝐽 ∈ (TopOn‘𝑋)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 = wceq 1570 ∈ wcel 2145 ∪ cuni 4867 ‘cfv 6533 Topctop 23119 TopOnctopon 23136 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7737 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 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-rab 3413 df-v 3452 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5550 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-iota 6489 df-fun 6535 df-fv 6541 df-topon 23137 |
| This theorem is used by: toptopon2 23144 eltpsi 23170 restuni 23388 stoig 23389 restlp 23409 restperf 23410 perfopn 23411 iscn2 23464 iscnp2 23465 cncnpi 23504 cncnp2 23507 cnnei 23508 cnrest 23511 cnpresti 23514 cnprest 23515 cnprest2 23516 paste 23520 t1sep2 23595 sshauslem 23598 1stcelcls 23688 kgenuni 23766 iskgen3 23776 txuni 23819 ptuniconst 23825 txcnmpt 23851 txcn 23853 txindis 23861 ptrescn 23866 txcmpb 23871 xkoptsub 23881 xkofvcn 23911 imasnopn 23917 imasncld 23918 imasncls 23919 qtopcmplem 23934 qtopkgen 23937 hmeof1o 23991 hmeores 23998 hmphindis 24024 cmphaushmeo 24027 txhmeo 24030 ptunhmeo 24035 hausflim 24208 flfneii 24219 hausflf 24224 flimfnfcls 24255 flfcntr 24270 cnextfun 24291 cnextfvval 24292 cnextf 24293 cnextcn 24294 cnextfres1 24295 retopon 24990 evth 25188 evth2 25189 qtophaus 34347 rrhre 34532 pconnconn 35811 connpconn 35815 pconnpi1 35817 sconnpi1 35819 txsconnlem 35820 txsconn 35821 cvmsf1o 35852 cvmliftmolem1 35861 cvmliftlem8 35872 cvmlift2lem9a 35883 cvmlift2lem9 35891 cvmlift2lem11 35893 cvmlift2lem12 35894 cvmliftphtlem 35897 cvmlift3lem6 35904 cvmlift3lem8 35906 cvmlift3lem9 35907 cnres2 38514 cnresima 38515 hausgraph 44047 ntrf2 44965 fcnre 45860 |
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