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Mirrors > Home > ILE Home > Th. List > cnclima | Unicode version |
Description: A closed subset of the codomain of a continuous function has a closed preimage. (Contributed by NM, 15-Mar-2007.) (Revised by Mario Carneiro, 21-Aug-2015.) |
Ref | Expression |
---|---|
cnclima |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2193 |
. . . . . 6
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2 | eqid 2193 |
. . . . . 6
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3 | 1, 2 | cnf 14372 |
. . . . 5
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4 | 3 | adantr 276 |
. . . 4
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5 | ffun 5406 |
. . . . . 6
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6 | funcnvcnv 5313 |
. . . . . 6
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7 | imadif 5334 |
. . . . . 6
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8 | 5, 6, 7 | 3syl 17 |
. . . . 5
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9 | fimacnv 5687 |
. . . . . 6
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10 | 9 | difeq1d 3276 |
. . . . 5
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11 | 8, 10 | eqtr2d 2227 |
. . . 4
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12 | 4, 11 | syl 14 |
. . 3
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13 | 2 | cldopn 14275 |
. . . 4
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14 | cnima 14388 |
. . . 4
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15 | 13, 14 | sylan2 286 |
. . 3
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16 | 12, 15 | eqeltrd 2270 |
. 2
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17 | cntop1 14369 |
. . . 4
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18 | 17 | adantr 276 |
. . 3
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19 | cnvimass 5028 |
. . . 4
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20 | 19, 4 | fssdm 5418 |
. . 3
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21 | 1 | iscld2 14272 |
. . 3
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22 | 18, 20, 21 | syl2anc 411 |
. 2
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23 | 16, 22 | mpbird 167 |
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 4147 ax-pow 4203 ax-pr 4238 ax-un 4464 ax-setind 4569 |
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 2986 df-csb 3081 df-dif 3155 df-un 3157 df-in 3159 df-ss 3166 df-pw 3603 df-sn 3624 df-pr 3625 df-op 3627 df-uni 3836 df-iun 3914 df-br 4030 df-opab 4091 df-mpt 4092 df-id 4324 df-xp 4665 df-rel 4666 df-cnv 4667 df-co 4668 df-dm 4669 df-rn 4670 df-res 4671 df-ima 4672 df-iota 5215 df-fun 5256 df-fn 5257 df-f 5258 df-fv 5262 df-ov 5921 df-oprab 5922 df-mpo 5923 df-1st 6193 df-2nd 6194 df-map 6704 df-top 14166 df-topon 14179 df-cld 14263 df-cn 14356 |
This theorem is referenced by: hmeocld 14480 |
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