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Mirrors > Home > ILE Home > Th. List > soss | Unicode version |
Description: Subset theorem for the strict ordering predicate. (Contributed by NM, 16-Mar-1997.) (Proof shortened by Andrew Salmon, 25-Jul-2011.) |
Ref | Expression |
---|---|
soss |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | poss 4082 |
. . 3
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2 | ssel 3003 |
. . . . . . . 8
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3 | ssel 3003 |
. . . . . . . 8
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4 | ssel 3003 |
. . . . . . . 8
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5 | 2, 3, 4 | 3anim123d 1251 |
. . . . . . 7
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6 | 5 | imim1d 74 |
. . . . . 6
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7 | 6 | 2alimdv 1804 |
. . . . 5
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8 | 7 | alimdv 1802 |
. . . 4
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9 | r3al 2413 |
. . . 4
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10 | r3al 2413 |
. . . 4
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11 | 8, 9, 10 | 3imtr4g 203 |
. . 3
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12 | 1, 11 | anim12d 328 |
. 2
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13 | df-iso 4081 |
. 2
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14 | df-iso 4081 |
. 2
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15 | 12, 13, 14 | 3imtr4g 203 |
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-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-17 1460 ax-i9 1464 ax-ial 1468 ax-i5r 1469 ax-ext 2065 |
This theorem depends on definitions: df-bi 115 df-3an 922 df-tru 1288 df-nf 1391 df-sb 1688 df-clab 2070 df-cleq 2076 df-clel 2079 df-nfc 2212 df-ral 2358 df-in 2989 df-ss 2996 df-po 4080 df-iso 4081 |
This theorem is referenced by: soeq2 4100 |
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