Korean J. Math. Vol. 20 No. 3 (2012) pp.293-305
DOI: https://doi.org/10.11568/kjm.2012.20.3.293

MODAL, NECESSITY, SUFFICIENCY AND CO-SUFFICIENCY OPERATORS

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Published: Sep 30, 2012

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Yong Chan Kim

Abstract

We investigate the properties of modal, necessity, suffi- ciency and co-sufficiency operators. We show that their operations induce various relations, respectively.



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