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真理値表から論理式を求める。 その2

Last updated at Posted at 2020-12-03

概要

sympyで真理値表から論理式を求める。
and,or,not,nand,nor,xorやってみた。

サンプルコード

import sympy as sym



print(">and")
print(sym.POSform(['a', 'b'], [[1, 1]]))
print(sym.SOPform(['a', 'b'], [[1, 1]]))
print(">or")
print(sym.POSform(['a', 'b'], [[1, 1], [0, 1], [1, 0]]))
print(sym.SOPform(['a', 'b'], [[1, 1], [0, 1], [1, 0]]))
print(">not")
print(sym.POSform(['c'], [[0]]))
print(sym.SOPform(['c'], [[0]]))
print(">nand")
print(sym.POSform(['a', 'b'], [[0, 0], [0, 1], [1, 0]]))
print(sym.SOPform(['a', 'b'], [[0, 0], [0, 1], [1, 0]]))
print(">nor")
print(sym.POSform(['a', 'b'], [[0, 0]]))
print(sym.SOPform(['a', 'b'], [[0, 0]]))
print(">xor")
print(sym.POSform(['a', 'b'], [[1, 0], [0, 1]]))
print(sym.SOPform(['a', 'b'], [[1, 0], [0, 1]]))

実行結果



>and
And(a, b)
And(a, b)
>or
Or(a, b)
Or(a, b)
>not
Not(c)
Not(c)
>nand
Or(Not(a), Not(b))
Or(Not(a), Not(b))
>nor
And(Not(a), Not(b))
And(Not(a), Not(b))
>xor
And(Or(Not(a), Not(b)), Or(a, b))
Or(And(Not(a), b), And(Not(b), a))


成果物

以上。

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