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Positive modal logic

Authors:

J. Michael Dunn

Affiliation:

1. Department of Philosophy, Indiana University, Sycamore Hall 028, 47405, Bloomington, IN, USA

Abstract:

We give a set of postulates for the minimal normal modal logicK₊ without negation or any kind of implication. The connectives are simply and

. The postulates (and theorems) are all deducibility statements phiv

. The only postulates that might not be obvious are