M.F. Cowlishaw
IBM Systems Journal
An algebra for multiple valued logic systems is presented in this paper. This algebra uses r-1 new concurrent operators along with the traditional supremum and cycle operators. It is also shown that r+1 operators are required to generate any r-valued logic function. Five new theorems, similar to DeMorgan's Laws, are then used to show that only one fundamental mapping is sufficient to represent any multi-valued logic function.
M.F. Cowlishaw
IBM Systems Journal
Michael Ray, Yves C. Martin
Proceedings of SPIE - The International Society for Optical Engineering
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CAD Computer Aided Design
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IEEE Transactions on Knowledge and Data Engineering