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Mirrors > Home > ILE Home > Th. List > cnima | Unicode version |
Description: An open subset of the codomain of a continuous function has an open preimage. (Contributed by FL, 15-Dec-2006.) |
Ref | Expression |
---|---|
cnima |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2165 | . . . . 5 | |
2 | eqid 2165 | . . . . 5 | |
3 | 1, 2 | iscn2 12840 | . . . 4 |
4 | 3 | simprbi 273 | . . 3 |
5 | 4 | simprd 113 | . 2 |
6 | imaeq2 4942 | . . . 4 | |
7 | 6 | eleq1d 2235 | . . 3 |
8 | 7 | rspccva 2829 | . 2 |
9 | 5, 8 | sylan 281 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wceq 1343 wcel 2136 wral 2444 cuni 3789 ccnv 4603 cima 4607 wf 5184 (class class class)co 5842 ctop 12635 ccn 12825 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-13 2138 ax-14 2139 ax-ext 2147 ax-sep 4100 ax-pow 4153 ax-pr 4187 ax-un 4411 ax-setind 4514 |
This theorem depends on definitions: df-bi 116 df-3an 970 df-tru 1346 df-fal 1349 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ne 2337 df-ral 2449 df-rex 2450 df-rab 2453 df-v 2728 df-sbc 2952 df-csb 3046 df-dif 3118 df-un 3120 df-in 3122 df-ss 3129 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-uni 3790 df-iun 3868 df-br 3983 df-opab 4044 df-mpt 4045 df-id 4271 df-xp 4610 df-rel 4611 df-cnv 4612 df-co 4613 df-dm 4614 df-rn 4615 df-res 4616 df-ima 4617 df-iota 5153 df-fun 5190 df-fn 5191 df-f 5192 df-fv 5196 df-ov 5845 df-oprab 5846 df-mpo 5847 df-1st 6108 df-2nd 6109 df-map 6616 df-top 12636 df-topon 12649 df-cn 12828 |
This theorem is referenced by: cnco 12861 cnclima 12863 cnntri 12864 cnss1 12866 cnss2 12867 cncnpi 12868 cnrest 12875 txcnmpt 12913 txdis1cn 12918 imasnopn 12939 hmeoima 12950 hmeoopn 12951 hmeoimaf1o 12954 |
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