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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 4053 |
. . 3
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2 | ssel 2993 |
. . . . . . . 8
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3 | ssel 2993 |
. . . . . . . 8
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4 | ssel 2993 |
. . . . . . . 8
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5 | 2, 3, 4 | 3anim123d 1250 |
. . . . . . 7
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6 | 5 | imim1d 74 |
. . . . . 6
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7 | 6 | 2alimdv 1802 |
. . . . 5
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8 | 7 | alimdv 1800 |
. . . 4
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9 | r3al 2408 |
. . . 4
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10 | r3al 2408 |
. . . 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 4052 |
. 2
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14 | df-iso 4052 |
. 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 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 |
This theorem depends on definitions: df-bi 115 df-3an 921 df-tru 1287 df-nf 1390 df-sb 1686 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-ral 2353 df-in 2979 df-ss 2986 df-po 4051 df-iso 4052 |
This theorem is referenced by: soeq2 4071 |
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