Binary boolean satisfiability (SAT) has its applications in nearly all aspects of electronic design automation. Recent advances made by research in multivalued logic, rather than binary (2-valued) logic, suggest that extending binary SAT into the multivalued domain may allow us to efficiently solve many new problems that arise from such research. This paper presents a first look at a possible “...

We present an algorithm that, starting from the surface skeleton of a 3D solid object, computes the curve skeleton. The algorithm is based on the detection of curves and junctions in the surface skeleton. It can be applied to any surface skeleton, including the case in which the surface skeleton is two-voxel thick.

Recently, the algebraic theory of MV -algebras is intensively studied. In this paper, we extend the concept of derivation of $MV$-algebras and we give someillustrative examples. Moreover, as a generalization of derivations of $MV$ -algebraswe introduce the notion of $f$-derivations and $(f; g)$-derivations of $MV$-algebras.Also, we investigate some properties of them.