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Mirrors > Home > NFE Home > Th. List > biluk | Unicode version |
Description: Lukasiewicz's shortest axiom for equivalential calculus. Storrs McCall, ed., Polish Logic 1920-1939 (Oxford, 1967), p. 96. (Contributed by NM, 10-Jan-2005.) |
Ref | Expression |
---|---|
biluk |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bicom 191 |
. . . . 5
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2 | 1 | bibi1i 305 |
. . . 4
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3 | biass 348 |
. . . 4
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4 | 2, 3 | bitri 240 |
. . 3
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5 | biass 348 |
. . 3
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6 | 4, 5 | mpbi 199 |
. 2
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7 | biass 348 |
. 2
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8 | 6, 7 | bitr4i 243 |
1
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Colors of variables: wff setvar class |
Syntax hints: ![]() |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 |
This theorem depends on definitions: df-bi 177 |
This theorem is referenced by: (None) |
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