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| As for the rest, the other two functions are easily recognized as corresponding to the one-place logical connectives, or the monadic operators on <math>\underline\mathbb{B}.</math> Thus, the function <math>F_1^{(1)} = F_{01}^{(1)}</math> is recognizable as the negation operation, and the function <math>F_2^{(1)} = F_{10}^{(1)}</math> is obviously the identity operation. | | As for the rest, the other two functions are easily recognized as corresponding to the one-place logical connectives, or the monadic operators on <math>\underline\mathbb{B}.</math> Thus, the function <math>F_1^{(1)} = F_{01}^{(1)}</math> is recognizable as the negation operation, and the function <math>F_2^{(1)} = F_{10}^{(1)}</math> is obviously the identity operation. |
| + | |
| + | Table 17 presents the boolean functions on two variables, <math>F^{(2)} : \underline\mathbb(B)^2 \to \underline\mathbb(B),</math> of which there are precisely sixteen in number. |
| + | |
| + | <br> |
| + | |
| + | {| align="center" border="1" cellpadding="4" cellspacing="0" style="text-align:center; width:90%" |
| + | |+ '''Table 17. Boolean Functions on Two Variables''' |
| + | |- style="background:ghostwhite" |
| + | | width="14%" | <math>F\!</math> |
| + | | width="14%" | <math>F\!</math> |
| + | | colspan="4" | <math>F(x, y)\!</math> |
| + | | width="24%" | <math>F\!</math> |
| + | |- style="background:ghostwhite" |
| + | | width="14%" | |
| + | | width="14%" | |
| + | | width="12%" | <math>F(\underline{1}, \underline{1})</math> |
| + | | width="12%" | <math>F(\underline{1}, \underline{0})</math> |
| + | | width="12%" | <math>F(\underline{0}, \underline{1})</math> |
| + | | width="12%" | <math>F(\underline{0}, \underline{0})</math> |
| + | | width="24%" | |
| + | |- |
| + | | <math>F_{0}^{(2)}\!</math> |
| + | | <math>F_{0000}^{(2)}\!</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>(~)</math> |
| + | |- |
| + | | <math>F_{1}^{(2)}\!</math> |
| + | | <math>F_{0001}^{(2)}\!</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>(x)(y)\!</math> |
| + | |- |
| + | | <math>F_{2}^{(2)}\!</math> |
| + | | <math>F_{0010}^{(2)}\!</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>(x) y\!</math> |
| + | |- |
| + | | <math>F_{3}^{(2)}\!</math> |
| + | | <math>F_{0011}^{(2)}\!</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>(x)\!</math> |
| + | |- |
| + | | <math>F_{4}^{(2)}\!</math> |
| + | | <math>F_{0100}^{(2)}\!</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>x (y)\!</math> |
| + | |- |
| + | | <math>F_{5}^{(2)}\!</math> |
| + | | <math>F_{0101}^{(2)}\!</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>(y)\!</math> |
| + | |- |
| + | | <math>F_{6}^{(2)}\!</math> |
| + | | <math>F_{0110}^{(2)}\!</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>(x, y)\!</math> |
| + | |- |
| + | | <math>F_{7}^{(2)}\!</math> |
| + | | <math>F_{0111}^{(2)}\!</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>(x y)\!</math> |
| + | |- |
| + | | <math>F_{8}^{(2)}\!</math> |
| + | | <math>F_{1000}^{(2)}\!</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>x y\!</math> |
| + | |- |
| + | | <math>F_{9}^{(2)}\!</math> |
| + | | <math>F_{1001}^{(2)}\!</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>((x, y))\!</math> |
| + | |- |
| + | | <math>F_{10}^{(2)}\!</math> |
| + | | <math>F_{1010}^{(2)}\!</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>y\!</math> |
| + | |- |
| + | | <math>F_{11}^{(2)}\!</math> |
| + | | <math>F_{1011}^{(2)}\!</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>(x (y))\!</math> |
| + | |- |
| + | | <math>F_{12}^{(2)}\!</math> |
| + | | <math>F_{1100}^{(2)}\!</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>x\!</math> |
| + | |- |
| + | | <math>F_{13}^{(2)}\!</math> |
| + | | <math>F_{1101}^{(2)}\!</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>((x)y)\!</math> |
| + | |- |
| + | | <math>F_{14}^{(2)}\!</math> |
| + | | <math>F_{1110}^{(2)}\!</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>\underline{0}</math> |
| + | | <math>((x)(y))\!</math> |
| + | |- |
| + | | <math>F_{15}^{(2)}\!</math> |
| + | | <math>F_{1111}^{(2)}\!</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>\underline{1}</math> |
| + | | <math>((~))</math> |
| + | |} |
| + | |
| + | <br> |
| + | |
| + | As before, all of the boolean functions of fewer variables are subsumed in this Table, though under a set of alternative names and possibly different interpretations. Just to acknowledge a few of the more notable pseudonyms: |
| | | |
| <pre> | | <pre> |
− | Table 17 presents the boolean functions on two variables, F^2 : %B%^2 -> %B%,
| |
− | of which there are precisely sixteen in number. As before, all of the boolean
| |
− | functions of fewer variables are subsumed in this Table, though under a set of
| |
− | alternative names and possibly different interpretations. Just to acknowledge
| |
− | a few of the more notable pseudonyms:
| |
− |
| |
| The constant function %0% : %B%^2 -> %B% appears under the name of F^2_00. | | The constant function %0% : %B%^2 -> %B% appears under the name of F^2_00. |
| | | |
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| [x =/= y] = [x + y] = F^2_06 (x, y) = (x , y). | | [x =/= y] = [x + y] = F^2_06 (x, y) = (x , y). |
− |
| |
− | Table 17. Boolean Functions on Two Variables
| |
− | o----------o----------o-------------------------------------------o----------o
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− | | Function | Function | F(x, y) | Function |
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− | o----------o----------o----------o----------o----------o----------o----------o
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− | | | | %1%, %1% | %1%, %0% | %0%, %1% | %0%, %0% | |
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− | o----------o----------o----------o----------o----------o----------o----------o
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− | | | | | | | | |
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− | | F^2_00 | F^2_0000 | %0% | %0% | %0% | %0% | () |
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− | | | | | | | | |
| |
− | | F^2_01 | F^2_0001 | %0% | %0% | %0% | %1% | (x)(y) |
| |
− | | | | | | | | |
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− | | F^2_02 | F^2_0010 | %0% | %0% | %1% | %0% | (x) y |
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− | | | | | | | | |
| |
− | | F^2_03 | F^2_0011 | %0% | %0% | %1% | %1% | (x) |
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− | | | | | | | | |
| |
− | | F^2_04 | F^2_0100 | %0% | %1% | %0% | %0% | x (y) |
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− | | | | | | | | |
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− | | F^2_05 | F^2_0101 | %0% | %1% | %0% | %1% | (y) |
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− | | | | | | | | |
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− | | F^2_06 | F^2_0110 | %0% | %1% | %1% | %0% | (x, y) |
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− | | | | | | | | |
| |
− | | F^2_07 | F^2_0111 | %0% | %1% | %1% | %1% | (x y) |
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− | | | | | | | | |
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− | | F^2_08 | F^2_1000 | %1% | %0% | %0% | %0% | x y |
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− | | | | | | | | |
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− | | F^2_09 | F^2_1001 | %1% | %0% | %0% | %1% | ((x, y)) |
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− | | | | | | | | |
| |
− | | F^2_10 | F^2_1010 | %1% | %0% | %1% | %0% | y |
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− | | | | | | | | |
| |
− | | F^2_11 | F^2_1011 | %1% | %0% | %1% | %1% | (x (y)) |
| |
− | | | | | | | | |
| |
− | | F^2_12 | F^2_1100 | %1% | %1% | %0% | %0% | x |
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− | | | | | | | | |
| |
− | | F^2_13 | F^2_1101 | %1% | %1% | %0% | %1% | ((x) y) |
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− | | | | | | | | |
| |
− | | F^2_14 | F^2_1110 | %1% | %1% | %1% | %0% | ((x)(y)) |
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− | | | | | | | | |
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− | | F^2_15 | F^2_1111 | %1% | %1% | %1% | %1% | (()) |
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− | | | | | | | | |
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− | o----------o----------o----------o----------o----------o----------o----------o
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| | | |
| Let me now address one last question that may have occurred to some. | | Let me now address one last question that may have occurred to some. |