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Mirrors > Home > QLE Home > Th. List > letr | Unicode version |
Description: Transitive law for l.e. |
Ref | Expression |
---|---|
letr.1 |
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letr.2 |
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Ref | Expression |
---|---|
letr |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | letr.1 |
. . . . . . . 8
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2 | 1 | df-le2 131 |
. . . . . . 7
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3 | 2 | ax-r5 38 |
. . . . . 6
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4 | 3 | ax-r1 35 |
. . . . 5
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5 | letr.2 |
. . . . . 6
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6 | 5 | df-le2 131 |
. . . . 5
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7 | ax-a3 32 |
. . . . 5
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8 | 4, 6, 7 | 3tr2 64 |
. . . 4
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9 | 8 | lan 77 |
. . 3
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10 | anabs 121 |
. . 3
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11 | 9, 10 | ax-r2 36 |
. 2
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12 | 11 | df2le1 135 |
1
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