On η-valued functionally complete truth functions
It is well known that the familiar Sheffer stroke function of the 2-valued propositional calculus is functionally complete (i.e., for any m, all 22m truth functions of m variables can be defined1 in terms of the stroke function). Indeed, it is not difficult to show that of the 16 2-valued functions of two variables, exactly two of them are functionally complete.
1936 ◽
Vol 42
(10)
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pp. 695-699
1970 ◽
Vol 16
(8)
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pp. 469-474
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2011 ◽
Vol 21
(4)
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pp. 671-677
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