Semisimple varieties of modal algebras

Kowalski, Tomasz; Kracht, Marcus

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Semisimple varieties of modal algebras

Date

2006

Authors

Kowalski, Tomasz

Kracht, Marcus

Publisher

Kluwer Academic Publishers

Abstract

In this paper we show that a variety of modal algebras of finite type is semisimple iff it is discriminator iff it is both weakly transitive and cyclic. This fact has been claimed already in [4] (based on joint work by the two authors) but the proof was fatally flawed.