… on the three-valued connectives that can be defined on rough sets is … starting from known
results in three-valued logics. … some modal and three-valued logics of rough sets in connection …

… a three-valued logic for rough sets. In this logic, the value t corresponds to the positive region
of a set, … a three-valued logic for modelling rough sets with semantics based on an Nmatrix. …

… three-valued logic with a natural deduction system called K3RSL. To describe a semantics
for RSL, we introduce a semantic … rough sets and a deduction system with three-valued logic. …

… its expressiveness and interpreted according to the three-valued Kleene matrix. Our choice
of … semantics of Łukasiewicz three-valued logic [16], whose connections with rough set logics …

… In the latter threevalued logics are used (identifying BOUNDARY and UNKNOWN). The … to
rough sets and approximations. Next, in Section 3, we discuss our choice of four-valued logic. …

… algebraic logic: Using the correspondence of regular double Stone algebras to three-valued …
, our results can also be considered a semantic approach to three-valued Lukasiewicz logic. …

… rough set representation of Kleene algebras, that is, (ii) of Theorem 1, relate rough sets with
the 3-valued semantics … of LK with respect to the rough set semantics. In Section 5, the perp …

… of covering-based rough sets, employing for that purpose a three-valued logic. The motivation
… ’s rough sets, a covering-based approximation space defines three regions of any set X of …

… The starting point for our three-valued approach to semantics was declarative debugging
of logic … To summarise, the declarative semantics we propose for logic programs is Clark’s …

… logics, as the deduction basis for the decision logic. To provide four-valued semantics to
decision logic of rough set, we … -type three-valued sequent calculus were proposed for rough set …