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Mirrors > Home > QLE Home > Th. List > lan | Unicode version |
Description: Introduce conjunct on left. |
Ref | Expression |
---|---|
lan.1 |
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Ref | Expression |
---|---|
lan |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | lan.1 |
. . . . 5
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2 | 1 | ax-r4 37 |
. . . 4
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3 | 2 | lor 70 |
. . 3
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4 | 3 | ax-r4 37 |
. 2
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5 | df-a 40 |
. 2
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6 | df-a 40 |
. 2
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7 | 4, 5, 6 | 3tr1 63 |
1
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