The past research on the state complexity of operations on regular languages is examined, and a new approach based on an old method (derivatives of regular expressions) is presente...
Recently, Mikołaj Boja´nczyk introduced a class of max-regular languages, an extension of regular languages of infinite words preserving many of its usual properties. This new c...
Abstract. Nested words are a restriction of the class of visibly pushdown languages that provide a natural model of runs of programs with recursive procedure calls. The usual conne...
The notion of recognition of a language by a finite semigroup can be generalized to recognition by finite groupoids, i.e. sets equipped with a binary operation ‘·’ which is ...
In this paper we describe an approach to representation of data and knowledge using two technologies: XML and regular expressions in a domain of natural language syntactic analysis...