We study definability of languages in arithmetic and the free monoid by bounded versions of fixed-point and transitive-closure logics. In particular we give logical characterisat...
We present some new decision and comparison problems of unusually high computational complexity. Most of the problems are strictly combinatorial in nature; others involve basic lo...
We recall the concept of a linguistic variable and the representation of its values (i.e. linguistic terms) by means of fuzzy sets. In this framework adverbs are represented by fuz...
In the recent literature on time representation, an effort has been made to characterize the notion of time granularity and the relationships between granularities, in order to ha...
Abstract. The conditions under which a formal system for reasoning about structural specifications, built over one logical system could be reused for reasoning about structured spe...