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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 |
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Ref | Expression |
---|---|
cncnpi |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cnsscnp.1 |
. . . 4
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2 | eqid 2193 |
. . . 4
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3 | 1, 2 | cnf 14383 |
. . 3
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4 | 3 | adantr 276 |
. 2
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5 | cnima 14399 |
. . . . . 6
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6 | 5 | ad2ant2r 509 |
. . . . 5
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7 | simpr 110 |
. . . . . . 7
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8 | 7 | adantr 276 |
. . . . . 6
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9 | simprr 531 |
. . . . . 6
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10 | 3 | ad2antrr 488 |
. . . . . . 7
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11 | ffn 5404 |
. . . . . . 7
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12 | elpreima 5678 |
. . . . . . 7
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13 | 10, 11, 12 | 3syl 17 |
. . . . . 6
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14 | 8, 9, 13 | mpbir2and 946 |
. . . . 5
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15 | eqimss 3234 |
. . . . . . . 8
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16 | 15 | biantrud 304 |
. . . . . . 7
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17 | eleq2 2257 |
. . . . . . 7
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18 | 16, 17 | bitr3d 190 |
. . . . . 6
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19 | 18 | rspcev 2865 |
. . . . 5
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20 | 6, 14, 19 | syl2anc 411 |
. . . 4
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21 | 20 | expr 375 |
. . 3
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22 | 21 | ralrimiva 2567 |
. 2
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23 | cntop1 14380 |
. . . . 5
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24 | 23 | adantr 276 |
. . . 4
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25 | 1 | toptopon 14197 |
. . . 4
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26 | 24, 25 | sylib 122 |
. . 3
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27 | cntop2 14381 |
. . . . 5
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28 | 27 | adantr 276 |
. . . 4
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29 | 2 | toptopon 14197 |
. . . 4
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30 | 28, 29 | sylib 122 |
. . 3
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31 | iscnp3 14382 |
. . 3
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32 | 26, 30, 7, 31 | syl3anc 1249 |
. 2
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33 | 4, 22, 32 | mpbir2and 946 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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 615 ax-in2 616 ax-io 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-13 2166 ax-14 2167 ax-ext 2175 ax-sep 4148 ax-pow 4204 ax-pr 4239 ax-un 4465 ax-setind 4570 |
This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1472 df-sb 1774 df-eu 2045 df-mo 2046 df-clab 2180 df-cleq 2186 df-clel 2189 df-nfc 2325 df-ne 2365 df-ral 2477 df-rex 2478 df-rab 2481 df-v 2762 df-sbc 2987 df-csb 3082 df-dif 3156 df-un 3158 df-in 3160 df-ss 3167 df-pw 3604 df-sn 3625 df-pr 3626 df-op 3628 df-uni 3837 df-iun 3915 df-br 4031 df-opab 4092 df-mpt 4093 df-id 4325 df-xp 4666 df-rel 4667 df-cnv 4668 df-co 4669 df-dm 4670 df-rn 4671 df-res 4672 df-ima 4673 df-iota 5216 df-fun 5257 df-fn 5258 df-f 5259 df-fv 5263 df-ov 5922 df-oprab 5923 df-mpo 5924 df-1st 6195 df-2nd 6196 df-map 6706 df-top 14177 df-topon 14190 df-cn 14367 df-cnp 14368 |
This theorem is referenced by: cnsscnp 14408 cncnp 14409 lmcn 14430 dvcnp2cntop 14878 dvaddxxbr 14880 dvmulxxbr 14881 dvcoapbr 14886 dvcjbr 14887 |
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