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Mirrors > Home > ILE Home > Th. List > eldiftp | Unicode version |
Description: Membership in a set with three elements removed. Similar to eldifsn 3682 and eldifpr 3583. (Contributed by David A. Wheeler, 22-Jul-2017.) |
Ref | Expression |
---|---|
eldiftp |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eldif 3107 |
. 2
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2 | eltpg 3600 |
. . . . 5
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3 | 2 | notbid 657 |
. . . 4
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4 | ne3anior 2412 |
. . . 4
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5 | 3, 4 | bitr4di 197 |
. . 3
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6 | 5 | pm5.32i 450 |
. 2
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7 | 1, 6 | bitri 183 |
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 1481 ax-10 1482 ax-11 1483 ax-i12 1484 ax-bndl 1486 ax-4 1487 ax-17 1503 ax-i9 1507 ax-ial 1511 ax-i5r 1512 ax-ext 2136 |
This theorem depends on definitions: df-bi 116 df-3or 964 df-3an 965 df-tru 1335 df-nf 1438 df-sb 1740 df-clab 2141 df-cleq 2147 df-clel 2150 df-nfc 2285 df-ne 2325 df-v 2711 df-dif 3100 df-un 3102 df-sn 3562 df-pr 3563 df-tp 3564 |
This theorem is referenced by: (None) |
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