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Independent Propositional Modal Logics

S. K. Thomason
Studia Logica: An International Journal for Symbolic Logic
Vol. 39, No. 2/3 (1980), pp. 143-144
Published by: Springer
Stable URL: http://www.jstor.org/stable/20014978
Page Count: 2
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Abstract

We show that the join of two classical [respectively, regular, normal] modal logics employing distinct modal operators is a conservative extension of each of them.

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