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Mirrors > Home > ILE Home > Th. List > poss | Unicode version |
Description: Subset theorem for the partial ordering predicate. (Contributed by NM, 27-Mar-1997.) (Proof shortened by Mario Carneiro, 18-Nov-2016.) |
Ref | Expression |
---|---|
poss |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssralv 3059 |
. . 3
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2 | ssralv 3059 |
. . . . 5
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3 | ssralv 3059 |
. . . . . 6
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4 | 3 | ralimdv 2431 |
. . . . 5
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5 | 2, 4 | syld 44 |
. . . 4
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6 | 5 | ralimdv 2431 |
. . 3
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7 | 1, 6 | syld 44 |
. 2
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8 | df-po 4053 |
. 2
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9 | df-po 4053 |
. 2
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10 | 7, 8, 9 | 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-5 1377 ax-7 1378 ax-gen 1379 ax-ie1 1423 ax-ie2 1424 ax-8 1436 ax-11 1438 ax-4 1441 ax-17 1460 ax-i9 1464 ax-ial 1468 ax-i5r 1469 ax-ext 2064 |
This theorem depends on definitions: df-bi 115 df-nf 1391 df-sb 1687 df-clab 2069 df-cleq 2075 df-clel 2078 df-ral 2354 df-in 2980 df-ss 2987 df-po 4053 |
This theorem is referenced by: poeq2 4057 soss 4071 |
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