, : (0) (1).
., , , , (1815-1864), . 1938 .
, , . 1, 0.
, , . , , A, B, C, , F, , , .
:
(. 1) :
1
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A /\ B |
A \/ B |
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0 |
0 |
0 |
0 |
1 |
1 |
0 |
1 |
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0 |
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, . , , , , , . , , (. 2) .
. 2. : (), (), ()
: ( A↓B), ( A│B), .
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