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Mirrors > Home > MPE Home > Th. List > cnima | Structured version Visualization version 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 2622 | . . . . 5 | |
2 | eqid 2622 | . . . . 5 | |
3 | 1, 2 | iscn2 21042 | . . . 4 |
4 | 3 | simprbi 480 | . . 3 |
5 | 4 | simprd 479 | . 2 |
6 | imaeq2 5462 | . . . 4 | |
7 | 6 | eleq1d 2686 | . . 3 |
8 | 7 | rspccva 3308 | . 2 |
9 | 5, 8 | sylan 488 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wa 384 wceq 1483 wcel 1990 wral 2912 cuni 4436 ccnv 5113 cima 5117 wf 5884 (class class class)co 6650 ctop 20698 ccn 21028 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-ral 2917 df-rex 2918 df-rab 2921 df-v 3202 df-sbc 3436 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-op 4184 df-uni 4437 df-br 4654 df-opab 4713 df-mpt 4730 df-id 5024 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-fv 5896 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-map 7859 df-top 20699 df-topon 20716 df-cn 21031 |
This theorem is referenced by: cnco 21070 cnclima 21072 cnntri 21075 cnss1 21080 cnss2 21081 cncnpi 21082 cnrest 21089 cnt0 21150 cnhaus 21158 cncmp 21195 cnconn 21225 2ndcomap 21261 kgencn3 21361 txcnmpt 21427 txdis1cn 21438 pthaus 21441 ptrescn 21442 txkgen 21455 xkoco2cn 21461 xkococnlem 21462 txconn 21492 imasnopn 21493 qtopkgen 21513 qtopss 21518 isr0 21540 kqreglem1 21544 kqreglem2 21545 kqnrmlem1 21546 kqnrmlem2 21547 hmeoima 21568 hmeoopn 21569 hmeoimaf1o 21573 reghmph 21596 nrmhmph 21597 tmdgsum2 21900 symgtgp 21905 ghmcnp 21918 tgpt0 21922 qustgpopn 21923 qustgplem 21924 nmhmcn 22920 mbfimaopnlem 23422 cncombf 23425 cnmbf 23426 dvloglem 24394 efopnlem2 24403 efopn 24404 atansopn 24659 cnmbfm 30325 cvmsss2 31256 cvmliftmolem2 31264 cvmliftlem15 31280 cvmlift2lem9a 31285 cvmlift2lem9 31293 cvmlift2lem10 31294 cvmlift3lem6 31306 cvmlift3lem8 31308 dvtanlem 33459 rfcnpre1 39178 rfcnpre2 39190 icccncfext 40100 |
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