Промежуточные таблицы истинности:¬X3:
¬X4:
X1∧X2:
(X1∧X2)∧(¬X3):
X1 | X2 | X3 | X1∧X2 | ¬X3 | (X1∧X2)∧(¬X3) |
0 | 0 | 0 | 0 | 1 | 0 |
0 | 0 | 1 | 0 | 0 | 0 |
0 | 1 | 0 | 0 | 1 | 0 |
0 | 1 | 1 | 0 | 0 | 0 |
1 | 0 | 0 | 0 | 1 | 0 |
1 | 0 | 1 | 0 | 0 | 0 |
1 | 1 | 0 | 1 | 1 | 1 |
1 | 1 | 1 | 1 | 0 | 0 |
((X1∧X2)∧(¬X3))∧(¬X4):
X1 | X2 | X3 | X4 | X1∧X2 | ¬X3 | (X1∧X2)∧(¬X3) | ¬X4 | ((X1∧X2)∧(¬X3))∧(¬X4) |
0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 |
0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 |
0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 |
0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
0 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 0 |
0 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 0 |
0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 |
0 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 |
1 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 |
1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 |
1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 1 |
1 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 0 |
1 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | 0 |
1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
¬X2:
(¬X2)∧X4:
X2 | X4 | ¬X2 | (¬X2)∧X4 |
0 | 0 | 1 | 0 |
0 | 1 | 1 | 1 |
1 | 0 | 0 | 0 |
1 | 1 | 0 | 0 |
X1⊕((¬X2)∧X4):
X1 | X2 | X4 | ¬X2 | (¬X2)∧X4 | X1⊕((¬X2)∧X4) |
0 | 0 | 0 | 1 | 0 | 0 |
0 | 0 | 1 | 1 | 1 | 1 |
0 | 1 | 0 | 0 | 0 | 0 |
0 | 1 | 1 | 0 | 0 | 0 |
1 | 0 | 0 | 1 | 0 | 1 |
1 | 0 | 1 | 1 | 1 | 0 |
1 | 1 | 0 | 0 | 0 | 1 |
1 | 1 | 1 | 0 | 0 | 1 |
¬(((X1∧X2)∧(¬X3))∧(¬X4)):
X1 | X2 | X3 | X4 | X1∧X2 | ¬X3 | (X1∧X2)∧(¬X3) | ¬X4 | ((X1∧X2)∧(¬X3))∧(¬X4) | ¬(((X1∧X2)∧(¬X3))∧(¬X4)) |
0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 1 |
0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 1 |
0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 |
0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 |
0 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 1 |
0 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 1 |
0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 |
0 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 |
1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 1 |
1 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 1 |
1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 |
1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 |
1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 |
1 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 1 |
1 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 1 |
1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 1 |
(¬(((X1∧X2)∧(¬X3))∧(¬X4)))∧(X1⊕((¬X2)∧X4)):
X1 | X2 | X3 | X4 | X1∧X2 | ¬X3 | (X1∧X2)∧(¬X3) | ¬X4 | ((X1∧X2)∧(¬X3))∧(¬X4) | ¬(((X1∧X2)∧(¬X3))∧(¬X4)) | ¬X2 | (¬X2)∧X4 | X1⊕((¬X2)∧X4) | (¬(((X1∧X2)∧(¬X3))∧(¬X4)))∧(X1⊕((¬X2)∧X4)) |
0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 |
0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 |
0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 |
0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 |
0 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
0 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 |
0 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 1 |
1 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 0 |
1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 1 |
1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 0 |
1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | 0 |
1 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 1 |
1 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 1 | 1 |
1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 |
(X1∧X2)∨(¬X3):
X1 | X2 | X3 | X1∧X2 | ¬X3 | (X1∧X2)∨(¬X3) |
0 | 0 | 0 | 0 | 1 | 1 |
0 | 0 | 1 | 0 | 0 | 0 |
0 | 1 | 0 | 0 | 1 | 1 |
0 | 1 | 1 | 0 | 0 | 0 |
1 | 0 | 0 | 0 | 1 | 1 |
1 | 0 | 1 | 0 | 0 | 0 |
1 | 1 | 0 | 1 | 1 | 1 |
1 | 1 | 1 | 1 | 0 | 1 |
((X1∧X2)∨(¬X3))∨(¬X4):
X1 | X2 | X3 | X4 | X1∧X2 | ¬X3 | (X1∧X2)∨(¬X3) | ¬X4 | ((X1∧X2)∨(¬X3))∨(¬X4) |
0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 |
0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 |
0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 |
0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
0 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 1 |
0 | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 1 |
0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 |
0 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 |
1 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 |
1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 |
1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 1 |
1 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 1 |
1 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 1 |
1 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 1 |
¬((¬(((X1∧X2)∧(¬X3))∧(¬X4)))∧(X1⊕((¬X2)∧X4))):
X1 | X2 | X3 | X4 | X1∧X2 | ¬X3 | (X1∧X2)∧(¬X3) | ¬X4 | ((X1∧X2)∧(¬X3))∧(¬X4) | ¬(((X1∧X2)∧(¬X3))∧(¬X4)) | ¬X2 | (¬X2)∧X4 | X1⊕((¬X2)∧X4) | (¬(((X1∧X2)∧(¬X3))∧(¬X4)))∧(X1⊕((¬X2)∧X4)) | ¬((¬(((X1∧X2)∧(¬X3))∧(¬X4)))∧(X1⊕((¬X2)∧X4))) |
0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 1 |
0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 |
0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 1 |
0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 |
0 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 |
0 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 |
0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 |
0 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 |
1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 0 |
1 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 1 |
1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 0 |
1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 1 |
1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 1 |
1 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 |
1 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 1 | 1 | 0 |
1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 |
¬(((X1∧X2)∨(¬X3))∨(¬X4)):
X1 | X2 | X3 | X4 | X1∧X2 | ¬X3 | (X1∧X2)∨(¬X3) | ¬X4 | ((X1∧X2)∨(¬X3))∨(¬X4) | ¬(((X1∧X2)∨(¬X3))∨(¬X4)) |
0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 0 |
0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 0 |
0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 |
0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 |
0 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 0 |
0 | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 0 |
0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 |
0 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 |
1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 0 |
1 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 0 |
1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 |
1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 |
1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 |
1 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 0 |
1 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 1 | 0 |
1 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 1 | 0 |
(¬((¬(((X1∧X2)∧(¬X3))∧(¬X4)))∧(X1⊕((¬X2)∧X4))))∨(¬(((X1∧X2)∨(¬X3))∨(¬X4))):
X1 | X2 | X3 | X4 | X1∧X2 | ¬X3 | (X1∧X2)∧(¬X3) | ¬X4 | ((X1∧X2)∧(¬X3))∧(¬X4) | ¬(((X1∧X2)∧(¬X3))∧(¬X4)) | ¬X2 | (¬X2)∧X4 | X1⊕((¬X2)∧X4) | (¬(((X1∧X2)∧(¬X3))∧(¬X4)))∧(X1⊕((¬X2)∧X4)) | ¬((¬(((X1∧X2)∧(¬X3))∧(¬X4)))∧(X1⊕((¬X2)∧X4))) | X1∧X2 | ¬X3 | (X1∧X2)∨(¬X3) | ¬X4 | ((X1∧X2)∨(¬X3))∨(¬X4) | ¬(((X1∧X2)∨(¬X3))∨(¬X4)) | (¬((¬(((X1∧X2)∧(¬X3))∧(¬X4)))∧(X1⊕((¬X2)∧X4))))∨(¬(((X1∧X2)∨(¬X3))∨(¬X4))) |
0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 1 |
0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 0 |
0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 1 |
0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
0 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 1 |
0 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 0 | 1 |
0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 1 |
0 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 0 | 0 |
1 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 0 | 1 |
1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 |
1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 |
1 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 1 | 0 | 0 |
1 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 0 |
1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 0 |
Общая таблица истинности:
X1 | X2 | X3 | X4 | ¬X3 | ¬X4 | X1∧X2 | (X1∧X2)∧(¬X3) | ((X1∧X2)∧(¬X3))∧(¬X4) | ¬X2 | (¬X2)∧X4 | X1⊕((¬X2)∧X4) | ¬(((X1∧X2)∧(¬X3))∧(¬X4)) | (¬(((X1∧X2)∧(¬X3))∧(¬X4)))∧(X1⊕((¬X2)∧X4)) | (X1∧X2)∨(¬X3) | ((X1∧X2)∨(¬X3))∨(¬X4) | ¬((¬(((X1∧X2)∧(¬X3))∧(¬X4)))∧(X1⊕((¬X2)∧X4))) | ¬(((X1∧X2)∨(¬X3))∨(¬X4)) | ¬(¬(X1∧X2∧¬X3∧¬X4)∧(X1⊕¬X2∧X4))∨¬(X1∧X2∨¬X3∨¬X4) |
0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 1 |
0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 |
0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 |
0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | 1 |
0 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 1 |
0 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 1 |
0 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 |
0 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 1 |
1 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 |
1 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 1 |
1 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 0 |
1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 1 |
1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 1 | 0 | 1 |
1 | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 |
1 | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 |
1 | 1 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 |
Логическая схема:
Совершенная дизъюнктивная нормальная форма (СДНФ):
По таблице истинности:
X1 | X2 | X3 | X4 | F |
0 | 0 | 0 | 0 | 1 |
0 | 0 | 0 | 1 | 0 |
0 | 0 | 1 | 0 | 1 |
0 | 0 | 1 | 1 | 1 |
0 | 1 | 0 | 0 | 1 |
0 | 1 | 0 | 1 | 1 |
0 | 1 | 1 | 0 | 1 |
0 | 1 | 1 | 1 | 1 |
1 | 0 | 0 | 0 | 0 |
1 | 0 | 0 | 1 | 1 |
1 | 0 | 1 | 0 | 0 |
1 | 0 | 1 | 1 | 1 |
1 | 1 | 0 | 0 | 1 |
1 | 1 | 0 | 1 | 0 |
1 | 1 | 1 | 0 | 0 |
1 | 1 | 1 | 1 | 0 |
F
сднф = ¬X1∧¬X2∧¬X3∧¬X4 ∨ ¬X1∧¬X2∧X3∧¬X4 ∨ ¬X1∧¬X2∧X3∧X4 ∨ ¬X1∧X2∧¬X3∧¬X4 ∨ ¬X1∧X2∧¬X3∧X4 ∨ ¬X1∧X2∧X3∧¬X4 ∨ ¬X1∧X2∧X3∧X4 ∨ X1∧¬X2∧¬X3∧X4 ∨ X1∧¬X2∧X3∧X4 ∨ X1∧X2∧¬X3∧¬X4
Логическая cхема:
Совершенная конъюнктивная нормальная форма (СКНФ):
По таблице истинности:
X1 | X2 | X3 | X4 | F |
0 | 0 | 0 | 0 | 1 |
0 | 0 | 0 | 1 | 0 |
0 | 0 | 1 | 0 | 1 |
0 | 0 | 1 | 1 | 1 |
0 | 1 | 0 | 0 | 1 |
0 | 1 | 0 | 1 | 1 |
0 | 1 | 1 | 0 | 1 |
0 | 1 | 1 | 1 | 1 |
1 | 0 | 0 | 0 | 0 |
1 | 0 | 0 | 1 | 1 |
1 | 0 | 1 | 0 | 0 |
1 | 0 | 1 | 1 | 1 |
1 | 1 | 0 | 0 | 1 |
1 | 1 | 0 | 1 | 0 |
1 | 1 | 1 | 0 | 0 |
1 | 1 | 1 | 1 | 0 |
F
скнф = (X1∨X2∨X3∨¬X4) ∧ (¬X1∨X2∨X3∨X4) ∧ (¬X1∨X2∨¬X3∨X4) ∧ (¬X1∨¬X2∨X3∨¬X4) ∧ (¬X1∨¬X2∨¬X3∨X4) ∧ (¬X1∨¬X2∨¬X3∨¬X4)
Логическая cхема:
Построение полинома Жегалкина:
По таблице истинности функции
X1 | X2 | X3 | X4 | Fж |
0 | 0 | 0 | 0 | 1 |
0 | 0 | 0 | 1 | 0 |
0 | 0 | 1 | 0 | 1 |
0 | 0 | 1 | 1 | 1 |
0 | 1 | 0 | 0 | 1 |
0 | 1 | 0 | 1 | 1 |
0 | 1 | 1 | 0 | 1 |
0 | 1 | 1 | 1 | 1 |
1 | 0 | 0 | 0 | 0 |
1 | 0 | 0 | 1 | 1 |
1 | 0 | 1 | 0 | 0 |
1 | 0 | 1 | 1 | 1 |
1 | 1 | 0 | 0 | 1 |
1 | 1 | 0 | 1 | 0 |
1 | 1 | 1 | 0 | 0 |
1 | 1 | 1 | 1 | 0 |
Построим полином Жегалкина:
F
ж = C
0000 ⊕ C
1000∧X1 ⊕ C
0100∧X2 ⊕ C
0010∧X3 ⊕ C
0001∧X4 ⊕ C
1100∧X1∧X2 ⊕ C
1010∧X1∧X3 ⊕ C
1001∧X1∧X4 ⊕ C
0110∧X2∧X3 ⊕ C
0101∧X2∧X4 ⊕ C
0011∧X3∧X4 ⊕ C
1110∧X1∧X2∧X3 ⊕ C
1101∧X1∧X2∧X4 ⊕ C
1011∧X1∧X3∧X4 ⊕ C
0111∧X2∧X3∧X4 ⊕ C
1111∧X1∧X2∧X3∧X4
Так как F
ж(0000) = 1, то С
0000 = 1.
Далее подставляем все остальные наборы в порядке возрастания числа единиц, подставляя вновь полученные значения в следующие формулы:
F
ж(1000) = С
0000 ⊕ С
1000 = 0 => С
1000 = 1 ⊕ 0 = 1
F
ж(0100) = С
0000 ⊕ С
0100 = 1 => С
0100 = 1 ⊕ 1 = 0
F
ж(0010) = С
0000 ⊕ С
0010 = 1 => С
0010 = 1 ⊕ 1 = 0
F
ж(0001) = С
0000 ⊕ С
0001 = 0 => С
0001 = 1 ⊕ 0 = 1
F
ж(1100) = С
0000 ⊕ С
1000 ⊕ С
0100 ⊕ С
1100 = 1 => С
1100 = 1 ⊕ 1 ⊕ 0 ⊕ 1 = 1
F
ж(1010) = С
0000 ⊕ С
1000 ⊕ С
0010 ⊕ С
1010 = 0 => С
1010 = 1 ⊕ 1 ⊕ 0 ⊕ 0 = 0
F
ж(1001) = С
0000 ⊕ С
1000 ⊕ С
0001 ⊕ С
1001 = 1 => С
1001 = 1 ⊕ 1 ⊕ 1 ⊕ 1 = 0
F
ж(0110) = С
0000 ⊕ С
0100 ⊕ С
0010 ⊕ С
0110 = 1 => С
0110 = 1 ⊕ 0 ⊕ 0 ⊕ 1 = 0
F
ж(0101) = С
0000 ⊕ С
0100 ⊕ С
0001 ⊕ С
0101 = 1 => С
0101 = 1 ⊕ 0 ⊕ 1 ⊕ 1 = 1
F
ж(0011) = С
0000 ⊕ С
0010 ⊕ С
0001 ⊕ С
0011 = 1 => С
0011 = 1 ⊕ 0 ⊕ 1 ⊕ 1 = 1
F
ж(1110) = С
0000 ⊕ С
1000 ⊕ С
0100 ⊕ С
0010 ⊕ С
1100 ⊕ С
1010 ⊕ С
0110 ⊕ С
1110 = 0 => С
1110 = 1 ⊕ 1 ⊕ 0 ⊕ 0 ⊕ 1 ⊕ 0 ⊕ 0 ⊕ 0 = 1
F
ж(1101) = С
0000 ⊕ С
1000 ⊕ С
0100 ⊕ С
0001 ⊕ С
1100 ⊕ С
1001 ⊕ С
0101 ⊕ С
1101 = 0 => С
1101 = 1 ⊕ 1 ⊕ 0 ⊕ 1 ⊕ 1 ⊕ 0 ⊕ 1 ⊕ 0 = 1
F
ж(1011) = С
0000 ⊕ С
1000 ⊕ С
0010 ⊕ С
0001 ⊕ С
1010 ⊕ С
1001 ⊕ С
0011 ⊕ С
1011 = 1 => С
1011 = 1 ⊕ 1 ⊕ 0 ⊕ 1 ⊕ 0 ⊕ 0 ⊕ 1 ⊕ 1 = 1
F
ж(0111) = С
0000 ⊕ С
0100 ⊕ С
0010 ⊕ С
0001 ⊕ С
0110 ⊕ С
0101 ⊕ С
0011 ⊕ С
0111 = 1 => С
0111 = 1 ⊕ 0 ⊕ 0 ⊕ 1 ⊕ 0 ⊕ 1 ⊕ 1 ⊕ 1 = 1
F
ж(1111) = С
0000 ⊕ С
1000 ⊕ С
0100 ⊕ С
0010 ⊕ С
0001 ⊕ С
1100 ⊕ С
1010 ⊕ С
1001 ⊕ С
0110 ⊕ С
0101 ⊕ С
0011 ⊕ С
1110 ⊕ С
1101 ⊕ С
1011 ⊕ С
0111 ⊕ С
1111 = 0 => С
1111 = 1 ⊕ 1 ⊕ 0 ⊕ 0 ⊕ 1 ⊕ 1 ⊕ 0 ⊕ 0 ⊕ 0 ⊕ 1 ⊕ 1 ⊕ 1 ⊕ 1 ⊕ 1 ⊕ 1 ⊕ 0 = 0
Таким образом, полином Жегалкина будет равен:
F
ж = 1 ⊕ X1 ⊕ X4 ⊕ X1∧X2 ⊕ X2∧X4 ⊕ X3∧X4 ⊕ X1∧X2∧X3 ⊕ X1∧X2∧X4 ⊕ X1∧X3∧X4 ⊕ X2∧X3∧X4
Логическая схема, соответствующая полиному Жегалкина: