Representations and characterizations of polynomial functions on chains

Details Representations and characterizations of polynomial functions on chains Representations and characterizations of polynomial functions on chains

2008-11-03

arxiv.org/abs/0811.0309v2

Journal of Multiple-Valued Logic and Soft Computing 16 (1-2) (2010) 65-86

Mathematics

Rings and Algebras

Scientific paper

We are interested in representations and characterizations of lattice polynomial functions f:L^n -> L, where L is a given bounded distributive lattice. In companion papers [arXiv 0901.4888, arXiv 0808.2619], we investigated certain representations and provided various characterizations of these functions both as solutions of certain functional equations and in terms of necessary and sufficient conditions. In the present paper, we investigate these representations and characterizations in the special case when L is a chain, i.e., a totally ordered lattice. More precisely, we discuss representations of lattice polynomial functions given in terms of standard simplices and we present new axiomatizations of these functions by relaxing some of the conditions given in [arXiv 0901.4888, arXiv 0808.2619] and by considering further conditions, namely comonotonic minitivity and maxitivity.

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