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Mirrors > Home > ILE Home > Th. List > ntreq0 | Unicode version |
Description: Two ways to say that a subset has an empty interior. (Contributed by NM, 3-Oct-2007.) (Revised by Jim Kingdon, 11-Mar-2023.) |
Ref | Expression |
---|---|
clscld.1 |
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Ref | Expression |
---|---|
ntreq0 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | clscld.1 |
. . . 4
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2 | 1 | ntrval 11978 |
. . 3
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3 | 2 | eqeq1d 2103 |
. 2
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4 | notm0 3322 |
. . . 4
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5 | ancom 263 |
. . . . . . . . . 10
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6 | elin 3198 |
. . . . . . . . . . 11
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7 | 6 | anbi1i 447 |
. . . . . . . . . 10
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8 | anass 394 |
. . . . . . . . . 10
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9 | 5, 7, 8 | 3bitri 205 |
. . . . . . . . 9
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10 | 9 | exbii 1548 |
. . . . . . . 8
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11 | eluni 3678 |
. . . . . . . 8
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12 | df-rex 2376 |
. . . . . . . 8
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13 | 10, 11, 12 | 3bitr4i 211 |
. . . . . . 7
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14 | 13 | exbii 1548 |
. . . . . 6
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15 | rexcom4 2656 |
. . . . . 6
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16 | 19.42v 1841 |
. . . . . . 7
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17 | 16 | rexbii 2396 |
. . . . . 6
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18 | 14, 15, 17 | 3bitr2i 207 |
. . . . 5
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19 | 18 | notbii 632 |
. . . 4
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20 | 4, 19 | bitr3i 185 |
. . 3
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21 | ralinexa 2416 |
. . 3
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22 | selpw 3456 |
. . . . 5
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23 | notm0 3322 |
. . . . 5
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24 | 22, 23 | imbi12i 238 |
. . . 4
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25 | 24 | ralbii 2395 |
. . 3
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26 | 20, 21, 25 | 3bitr2i 207 |
. 2
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27 | 3, 26 | syl6bb 195 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 582 ax-in2 583 ax-io 668 ax-5 1388 ax-7 1389 ax-gen 1390 ax-ie1 1434 ax-ie2 1435 ax-8 1447 ax-10 1448 ax-11 1449 ax-i12 1450 ax-bndl 1451 ax-4 1452 ax-13 1456 ax-14 1457 ax-17 1471 ax-i9 1475 ax-ial 1479 ax-i5r 1480 ax-ext 2077 ax-coll 3975 ax-sep 3978 ax-pow 4030 ax-pr 4060 ax-un 4284 |
This theorem depends on definitions: df-bi 116 df-3an 929 df-tru 1299 df-fal 1302 df-nf 1402 df-sb 1700 df-eu 1958 df-mo 1959 df-clab 2082 df-cleq 2088 df-clel 2091 df-nfc 2224 df-ral 2375 df-rex 2376 df-reu 2377 df-rab 2379 df-v 2635 df-sbc 2855 df-csb 2948 df-dif 3015 df-un 3017 df-in 3019 df-ss 3026 df-nul 3303 df-pw 3451 df-sn 3472 df-pr 3473 df-op 3475 df-uni 3676 df-iun 3754 df-br 3868 df-opab 3922 df-mpt 3923 df-id 4144 df-xp 4473 df-rel 4474 df-cnv 4475 df-co 4476 df-dm 4477 df-rn 4478 df-res 4479 df-ima 4480 df-iota 5014 df-fun 5051 df-fn 5052 df-f 5053 df-f1 5054 df-fo 5055 df-f1o 5056 df-fv 5057 df-top 11865 df-ntr 11964 |
This theorem is referenced by: (None) |
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