Abstract
Filter theory plays a vital role in studying fuzzy logical systems and their algebraic structures. Various types of filters have been extensively investigated in the literature. In this paper, several types of filters related to the Stonean axiom in residuated lattices are introduced such as Stonean filters, subimplicative filters, De Morgan filters, RDP-filters and (weak) subimplicative-Stonean filters, the relationships between them and some existing types of filters are obtained. Particularly, it is shown that a filter is a weak subimplicative-Stonean filter if and only if subimplicative filter coincides with Stonean filter. By these filters, the Stonean axiom and its alternative definitions in an arbitrary residuated lattice are investigated. In particular, it is proved that Stonean axiom and subimplicative axiom coincide when the residuated lattice is subimplicative-Stonean, specially, De Morgan or RDP.
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