Studia Logica

, Volume 49, Issue 4, pp 501–514

Models for relevant modal logics

  • André Fuhrmann

DOI: 10.1007/BF00370161

Cite this article as:
Fuhrmann, A. Studia Logica (1990) 49: 501. doi:10.1007/BF00370161


Semantics are given for modal extensions of relevant logics based on the kind of frames introduced in [7]. By means of a simple recipe we may obtain from a class FRM (L) of unreduced frames characterising a (non-modal) logic L, frame-classes FRM (L.M) characterising conjunctively regular modal extensions L.M of L. By displaying an incompleteness phenomenon, it is shown how the recipe fails when reduced frames are under consideration.

Copyright information

© Polish Academy of Sciences 1990

Authors and Affiliations

  • André Fuhrmann
    • 1
  1. 1.Universität Konstanz Zentrum Philosophie und WissenschaftstheorieKonstanzW. Germany

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