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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 2175 | . . . 4 | |
3 | 1, 2 | cnf 13255 | . . 3 |
4 | 3 | adantr 276 | . 2 |
5 | cnima 13271 | . . . . . 6 | |
6 | 5 | ad2ant2r 509 | . . . . 5 |
7 | simpr 110 | . . . . . . 7 | |
8 | 7 | adantr 276 | . . . . . 6 |
9 | simprr 531 | . . . . . 6 | |
10 | 3 | ad2antrr 488 | . . . . . . 7 |
11 | ffn 5357 | . . . . . . 7 | |
12 | elpreima 5627 | . . . . . . 7 | |
13 | 10, 11, 12 | 3syl 17 | . . . . . 6 |
14 | 8, 9, 13 | mpbir2and 944 | . . . . 5 |
15 | eqimss 3207 | . . . . . . . 8 | |
16 | 15 | biantrud 304 | . . . . . . 7 |
17 | eleq2 2239 | . . . . . . 7 | |
18 | 16, 17 | bitr3d 190 | . . . . . 6 |
19 | 18 | rspcev 2839 | . . . . 5 |
20 | 6, 14, 19 | syl2anc 411 | . . . 4 |
21 | 20 | expr 375 | . . 3 |
22 | 21 | ralrimiva 2548 | . 2 |
23 | cntop1 13252 | . . . . 5 | |
24 | 23 | adantr 276 | . . . 4 |
25 | 1 | toptopon 13067 | . . . 4 TopOn |
26 | 24, 25 | sylib 122 | . . 3 TopOn |
27 | cntop2 13253 | . . . . 5 | |
28 | 27 | adantr 276 | . . . 4 |
29 | 2 | toptopon 13067 | . . . 4 TopOn |
30 | 28, 29 | sylib 122 | . . 3 TopOn |
31 | iscnp3 13254 | . . 3 TopOn TopOn | |
32 | 26, 30, 7, 31 | syl3anc 1238 | . 2 |
33 | 4, 22, 32 | mpbir2and 944 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 104 wb 105 wceq 1353 wcel 2146 wral 2453 wrex 2454 wss 3127 cuni 3805 ccnv 4619 cima 4623 wfn 5203 wf 5204 cfv 5208 (class class class)co 5865 ctop 13046 TopOnctopon 13059 ccn 13236 ccnp 13237 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 614 ax-in2 615 ax-io 709 ax-5 1445 ax-7 1446 ax-gen 1447 ax-ie1 1491 ax-ie2 1492 ax-8 1502 ax-10 1503 ax-11 1504 ax-i12 1505 ax-bndl 1507 ax-4 1508 ax-17 1524 ax-i9 1528 ax-ial 1532 ax-i5r 1533 ax-13 2148 ax-14 2149 ax-ext 2157 ax-sep 4116 ax-pow 4169 ax-pr 4203 ax-un 4427 ax-setind 4530 |
This theorem depends on definitions: df-bi 117 df-3an 980 df-tru 1356 df-fal 1359 df-nf 1459 df-sb 1761 df-eu 2027 df-mo 2028 df-clab 2162 df-cleq 2168 df-clel 2171 df-nfc 2306 df-ne 2346 df-ral 2458 df-rex 2459 df-rab 2462 df-v 2737 df-sbc 2961 df-csb 3056 df-dif 3129 df-un 3131 df-in 3133 df-ss 3140 df-pw 3574 df-sn 3595 df-pr 3596 df-op 3598 df-uni 3806 df-iun 3884 df-br 3999 df-opab 4060 df-mpt 4061 df-id 4287 df-xp 4626 df-rel 4627 df-cnv 4628 df-co 4629 df-dm 4630 df-rn 4631 df-res 4632 df-ima 4633 df-iota 5170 df-fun 5210 df-fn 5211 df-f 5212 df-fv 5216 df-ov 5868 df-oprab 5869 df-mpo 5870 df-1st 6131 df-2nd 6132 df-map 6640 df-top 13047 df-topon 13060 df-cn 13239 df-cnp 13240 |
This theorem is referenced by: cnsscnp 13280 cncnp 13281 lmcn 13302 dvcnp2cntop 13714 dvaddxxbr 13716 dvmulxxbr 13717 dvcoapbr 13722 dvcjbr 13723 |
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