# Isotone mapping

From Encyclopedia of Mathematics

*order-preserving mapping*

A single-valued mapping $\phi$ of a partially ordered set $A$ into a partially ordered set $B$ preserving the order. Isotone mappings play the role of homomorphisms of partially ordered sets (considered as algebraic systems with a single relation, cf. Algebraic system). An isotone mapping is also called a monotone mapping.

#### Comments

Such mappings are also called increasing or order-preserving. The term "monotone" generally denotes a mapping which may be either isotone or antitone (cf. Antitone mapping).

**How to Cite This Entry:**

Isotone mapping.

*Encyclopedia of Mathematics.*URL: http://www.encyclopediaofmath.org/index.php?title=Isotone_mapping&oldid=37398

This article was adapted from an original article by O.A. Ivanova (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article