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Mirrors > Home > ILE Home > Th. List > Mathboxes > bj-indint | Unicode version |
Description: The property of being an inductive class is closed under intersections. (Contributed by BJ, 30-Nov-2019.) |
Ref | Expression |
---|---|
bj-indint |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-bj-ind 10880 |
. . . . 5
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2 | 1 | simplbi 268 |
. . . 4
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3 | 2 | rgenw 2419 |
. . 3
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4 | 0ex 3913 |
. . . 4
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5 | 4 | elintrab 3656 |
. . 3
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6 | 3, 5 | mpbir 144 |
. 2
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7 | bj-indsuc 10881 |
. . . . . 6
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8 | 7 | a2i 11 |
. . . . 5
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9 | 8 | ralimi 2427 |
. . . 4
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10 | vex 2605 |
. . . . 5
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11 | 10 | elintrab 3656 |
. . . 4
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12 | 10 | bj-sucex 10872 |
. . . . 5
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13 | 12 | elintrab 3656 |
. . . 4
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14 | 9, 11, 13 | 3imtr4i 199 |
. . 3
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15 | 14 | rgen 2417 |
. 2
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16 | df-bj-ind 10880 |
. 2
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17 | 6, 15, 16 | mpbir2an 884 |
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 104 ax-ia2 105 ax-ia3 106 ax-in1 577 ax-in2 578 ax-io 663 ax-5 1377 ax-7 1378 ax-gen 1379 ax-ie1 1423 ax-ie2 1424 ax-8 1436 ax-10 1437 ax-11 1438 ax-i12 1439 ax-bndl 1440 ax-4 1441 ax-13 1445 ax-14 1446 ax-17 1460 ax-i9 1464 ax-ial 1468 ax-i5r 1469 ax-ext 2064 ax-nul 3912 ax-pr 3972 ax-un 4196 ax-bd0 10762 ax-bdor 10765 ax-bdex 10768 ax-bdeq 10769 ax-bdel 10770 ax-bdsb 10771 ax-bdsep 10833 |
This theorem depends on definitions: df-bi 115 df-tru 1288 df-nf 1391 df-sb 1687 df-clab 2069 df-cleq 2075 df-clel 2078 df-nfc 2209 df-ral 2354 df-rex 2355 df-rab 2358 df-v 2604 df-dif 2976 df-un 2978 df-nul 3259 df-sn 3412 df-pr 3413 df-uni 3610 df-int 3645 df-suc 4134 df-bdc 10790 df-bj-ind 10880 |
This theorem is referenced by: bj-omind 10887 |
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