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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 23119 | . . 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 2146 ∪ cuni 4874 ‘cfv 6540 Topctop 23100 TopOnctopon 23117 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7742 |
| 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 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-ral 3082 df-rex 3092 df-rab 3419 df-v 3459 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-br 5112 df-opab 5176 df-mpt 5195 df-id 5558 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-iota 6496 df-fun 6542 df-fv 6548 df-topon 23118 |
| This theorem is used by: toptopon2 23125 eltpsi 23151 restuni 23369 stoig 23370 restlp 23390 restperf 23391 perfopn 23392 iscn2 23445 iscnp2 23446 cncnpi 23485 cncnp2 23488 cnnei 23489 cnrest 23492 cnpresti 23495 cnprest 23496 cnprest2 23497 paste 23501 t1sep2 23576 sshauslem 23579 1stcelcls 23669 kgenuni 23747 iskgen3 23757 txuni 23800 ptuniconst 23806 txcnmpt 23832 txcn 23834 txindis 23842 ptrescn 23847 txcmpb 23852 xkoptsub 23862 xkofvcn 23892 imasnopn 23898 imasncld 23899 imasncls 23900 qtopcmplem 23915 qtopkgen 23918 hmeof1o 23972 hmeores 23979 hmphindis 24005 cmphaushmeo 24008 txhmeo 24011 ptunhmeo 24016 hausflim 24189 flfneii 24200 hausflf 24205 flimfnfcls 24236 flfcntr 24251 cnextfun 24272 cnextfvval 24273 cnextf 24274 cnextcn 24275 cnextfres1 24276 retopon 24971 evth 25169 evth2 25170 qtophaus 34290 rrhre 34475 pconnconn 35760 connpconn 35764 pconnpi1 35766 sconnpi1 35768 txsconnlem 35769 txsconn 35770 cvmsf1o 35801 cvmliftmolem1 35810 cvmliftlem8 35821 cvmlift2lem9a 35832 cvmlift2lem9 35840 cvmlift2lem11 35842 cvmlift2lem12 35843 cvmliftphtlem 35846 cvmlift3lem6 35853 cvmlift3lem8 35855 cvmlift3lem9 35856 cnres2 38472 cnresima 38473 hausgraph 43990 ntrf2 44908 fcnre 45803 |
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