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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 23230 | . . 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 6538 Topctop 23211 TopOnctopon 23228 |
| 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 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7751 |
| 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 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 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 5546 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-iota 6494 df-fun 6540 df-fv 6546 df-topon 23229 |
| This theorem is used by: toptopon2 23236 eltpsi 23262 restuni 23480 stoig 23481 restlp 23501 restperf 23502 perfopn 23503 iscn2 23556 iscnp2 23557 cncnpi 23596 cncnp2 23599 cnnei 23600 cnrest 23603 cnpresti 23606 cnprest 23607 cnprest2 23608 paste 23612 t1sep2 23687 sshauslem 23690 1stcelcls 23780 kgenuni 23858 iskgen3 23868 txuni 23911 ptuniconst 23917 txcnmpt 23943 txcn 23945 txindis 23953 ptrescn 23958 txcmpb 23963 xkoptsub 23973 xkofvcn 24003 imasnopn 24009 imasncld 24010 imasncls 24011 qtopcmplem 24026 qtopkgen 24029 hmeof1o 24083 hmeores 24090 hmphindis 24116 cmphaushmeo 24119 txhmeo 24122 ptunhmeo 24127 hausflim 24300 flfneii 24311 hausflf 24316 flimfnfcls 24347 flfcntr 24362 cnextfun 24383 cnextfvval 24384 cnextf 24385 cnextcn 24386 cnextfres1 24387 retopon 25082 evth 25280 evth2 25281 qtophaus 34468 rrhre 34653 pconnconn 35996 connpconn 36000 pconnpi1 36002 sconnpi1 36004 txsconnlem 36005 txsconn 36006 cvmsf1o 36037 cvmliftmolem1 36046 cvmliftlem8 36057 cvmlift2lem9a 36068 cvmlift2lem9 36076 cvmlift2lem11 36078 cvmlift2lem12 36079 cvmliftphtlem 36082 cvmlift3lem6 36089 cvmlift3lem8 36091 cvmlift3lem9 36092 cnres2 38697 cnresima 38698 hausgraph 44206 ntrf2 45123 fcnre 46041 |
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