Cyclic negation

In many-valued logic with linearly ordered truth values, cyclic negation is a unary truth function that takes a truth value n and returns n  1 as value if n is not the lowest value; otherwise it returns the highest value.

For example, let the set of truth values be {0,1,2}, let ~ denote negation, and let p be a variable ranging over truth values. For these choices, if p = 0 then ~p = 2; and if p = 1 then ~p = 0.

Cyclic negation was originally introduced by the logician and mathematician Emil Post.

References


This article is issued from Wikipedia - version of the 11/2/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.