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semiorder


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A term introduced in 1956 by the US mathematical psychologist Robert Duncan Luce (born 1925) to denote an ordering, such as a preference ordering, in which an element x is ranked above another element y only if it exceeds y by a certain specified threshold value ☐, and x ties with y if the absolute difference between them falls below ☐. See also lexicographic semiorder.

Subjects: Psychology.


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