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Mirrors > Home > ILE Home > Th. List > undifdcss | Unicode version |
Description: Union of complementary parts into whole and decidability. (Contributed by Jim Kingdon, 17-Jun-2022.) |
Ref | Expression |
---|---|
undifdcss |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqimss2 3157 |
. . . 4
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2 | undifss 3448 |
. . . 4
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3 | 1, 2 | sylibr 133 |
. . 3
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4 | eleq2 2204 |
. . . . . . . 8
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5 | 4 | biimpa 294 |
. . . . . . 7
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6 | elun 3222 |
. . . . . . 7
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7 | 5, 6 | sylib 121 |
. . . . . 6
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8 | eldifn 3204 |
. . . . . . 7
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9 | 8 | orim2i 751 |
. . . . . 6
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10 | 7, 9 | syl 14 |
. . . . 5
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11 | df-dc 821 |
. . . . 5
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12 | 10, 11 | sylibr 133 |
. . . 4
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13 | 12 | ralrimiva 2508 |
. . 3
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14 | 3, 13 | jca 304 |
. 2
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15 | elun1 3248 |
. . . . . . 7
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16 | 15 | adantl 275 |
. . . . . 6
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17 | simplr 520 |
. . . . . . . 8
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18 | simpr 109 |
. . . . . . . 8
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19 | 17, 18 | eldifd 3086 |
. . . . . . 7
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20 | elun2 3249 |
. . . . . . 7
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21 | 19, 20 | syl 14 |
. . . . . 6
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22 | eleq1 2203 |
. . . . . . . . 9
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23 | 22 | dcbid 824 |
. . . . . . . 8
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24 | simplr 520 |
. . . . . . . 8
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25 | simpr 109 |
. . . . . . . 8
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26 | 23, 24, 25 | rspcdva 2798 |
. . . . . . 7
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27 | exmiddc 822 |
. . . . . . 7
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28 | 26, 27 | syl 14 |
. . . . . 6
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29 | 16, 21, 28 | mpjaodan 788 |
. . . . 5
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30 | 29 | ex 114 |
. . . 4
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31 | 30 | ssrdv 3108 |
. . 3
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32 | 2 | biimpi 119 |
. . . 4
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33 | 32 | adantr 274 |
. . 3
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34 | 31, 33 | eqssd 3119 |
. 2
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35 | 14, 34 | impbii 125 |
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 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-10 1484 ax-11 1485 ax-i12 1486 ax-bndl 1487 ax-4 1488 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 |
This theorem depends on definitions: df-bi 116 df-dc 821 df-tru 1335 df-nf 1438 df-sb 1737 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-ral 2422 df-v 2691 df-dif 3078 df-un 3080 df-in 3082 df-ss 3089 |
This theorem is referenced by: sbthlemi5 6857 sbthlemi6 6858 exmidfodomrlemim 7074 |
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