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Displaying similar documents to “On presentations of semigroup rings”

When is every order ideal a ring ideal?

Melvin Henriksen, Suzanne Larson, Frank A. Smith (1991)

Commentationes Mathematicae Universitatis Carolinae

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A lattice-ordered ring is called an if each of its order ideals is a ring ideal. Generalizing earlier work of Basly and Triki, OIRI-rings are characterized as those f -rings such that / 𝕀 is contained in an f -ring with an identity element that is a strong order unit for some nil l -ideal 𝕀 of . In particular, if P ( ) denotes the set of nilpotent elements of the f -ring , then is an OIRI-ring if and only if / P ( ) is contained in an f -ring with an identity element that is a strong order unit. ...