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Mirrors > Home > ILE Home > Th. List > cncnpi | Unicode version |
Description: A continuous function is continuous at all points. One direction of Theorem 7.2(g) of [Munkres] p. 107. (Contributed by Raph Levien, 20-Nov-2006.) (Proof shortened by Mario Carneiro, 21-Aug-2015.) |
Ref | Expression |
---|---|
cnsscnp.1 |
Ref | Expression |
---|---|
cncnpi |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cnsscnp.1 | . . . 4 | |
2 | eqid 2165 | . . . 4 | |
3 | 1, 2 | cnf 12844 | . . 3 |
4 | 3 | adantr 274 | . 2 |
5 | cnima 12860 | . . . . . 6 | |
6 | 5 | ad2ant2r 501 | . . . . 5 |
7 | simpr 109 | . . . . . . 7 | |
8 | 7 | adantr 274 | . . . . . 6 |
9 | simprr 522 | . . . . . 6 | |
10 | 3 | ad2antrr 480 | . . . . . . 7 |
11 | ffn 5337 | . . . . . . 7 | |
12 | elpreima 5604 | . . . . . . 7 | |
13 | 10, 11, 12 | 3syl 17 | . . . . . 6 |
14 | 8, 9, 13 | mpbir2and 934 | . . . . 5 |
15 | eqimss 3196 | . . . . . . . 8 | |
16 | 15 | biantrud 302 | . . . . . . 7 |
17 | eleq2 2230 | . . . . . . 7 | |
18 | 16, 17 | bitr3d 189 | . . . . . 6 |
19 | 18 | rspcev 2830 | . . . . 5 |
20 | 6, 14, 19 | syl2anc 409 | . . . 4 |
21 | 20 | expr 373 | . . 3 |
22 | 21 | ralrimiva 2539 | . 2 |
23 | cntop1 12841 | . . . . 5 | |
24 | 23 | adantr 274 | . . . 4 |
25 | 1 | toptopon 12656 | . . . 4 TopOn |
26 | 24, 25 | sylib 121 | . . 3 TopOn |
27 | cntop2 12842 | . . . . 5 | |
28 | 27 | adantr 274 | . . . 4 |
29 | 2 | toptopon 12656 | . . . 4 TopOn |
30 | 28, 29 | sylib 121 | . . 3 TopOn |
31 | iscnp3 12843 | . . 3 TopOn TopOn | |
32 | 26, 30, 7, 31 | syl3anc 1228 | . 2 |
33 | 4, 22, 32 | mpbir2and 934 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wb 104 wceq 1343 wcel 2136 wral 2444 wrex 2445 wss 3116 cuni 3789 ccnv 4603 cima 4607 wfn 5183 wf 5184 cfv 5188 (class class class)co 5842 ctop 12635 TopOnctopon 12648 ccn 12825 ccnp 12826 |
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 df-cnp 12829 |
This theorem is referenced by: cnsscnp 12869 cncnp 12870 lmcn 12891 dvcnp2cntop 13303 dvaddxxbr 13305 dvmulxxbr 13306 dvcoapbr 13311 dvcjbr 13312 |
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