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Mirrors > Home > ILE Home > Th. List > difundi | Unicode version |
Description: Distributive law for class difference. Theorem 39 of [Suppes] p. 29. (Contributed by NM, 17-Aug-2004.) |
Ref | Expression |
---|---|
difundi |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eldif 3046 |
. . . 4
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2 | eldif 3046 |
. . . 4
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3 | 1, 2 | anbi12i 453 |
. . 3
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4 | elin 3225 |
. . 3
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5 | eldif 3046 |
. . . . . 6
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6 | elun 3183 |
. . . . . . . 8
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7 | 6 | notbii 640 |
. . . . . . 7
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8 | 7 | anbi2i 450 |
. . . . . 6
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9 | 5, 8 | bitri 183 |
. . . . 5
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10 | ioran 724 |
. . . . . 6
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11 | 10 | anbi2i 450 |
. . . . 5
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12 | 9, 11 | bitri 183 |
. . . 4
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13 | anandi 562 |
. . . 4
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14 | 12, 13 | bitri 183 |
. . 3
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15 | 3, 4, 14 | 3bitr4ri 212 |
. 2
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16 | 15 | eqriv 2112 |
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 586 ax-in2 587 ax-io 681 ax-5 1406 ax-7 1407 ax-gen 1408 ax-ie1 1452 ax-ie2 1453 ax-8 1465 ax-10 1466 ax-11 1467 ax-i12 1468 ax-bndl 1469 ax-4 1470 ax-17 1489 ax-i9 1493 ax-ial 1497 ax-i5r 1498 ax-ext 2097 |
This theorem depends on definitions: df-bi 116 df-tru 1317 df-nf 1420 df-sb 1719 df-clab 2102 df-cleq 2108 df-clel 2111 df-nfc 2244 df-v 2659 df-dif 3039 df-un 3041 df-in 3043 |
This theorem is referenced by: undm 3300 undifdc 6765 uncld 12125 |
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