Two Neighborhood Semantics for Subintuitionistic Logics
Dick de Jongh, Fatemeh Shirmohammadzadeh Maleki

Abstract:
This investigation  is concerned with weak subintuitionistic logics with neighbourhood models introduced by the authors in 2016. The two types of neighborhood models introduced in that article are compared and the relationship between the two types of models is clarified. Thereby modal companions for various logics are recognized. Many of the extensions of the basic logics are discussed and characterized.