Abstract. We show that finding roots of Boolean matrices is an NPhard problem. This answers a twenty year old question from semigroup theory. Interpreting Boolean matrices as dire...
We propose a web-based computer-assisted tool for diagnosing progress in international negotiation. The system is based on a general linear model. Innovative features of the progr...
The goal of this paper is to announce there is a single orbit of the c.e. sets with inclusion, E, such that the question of membership in this orbit is 1 1-complete. This result an...
, Allen C.) see Innovations in teaching abstract algebra, 2003b:00019 Littlewood, D. E. The skeleton key of mathematics. (English summary) 2003j:01046 Magnin, Louis Quelques questi...
Research in context-aware computing has produced a number of application prototypes, frameworks, middlewares and models for describing context. However, development of ubiquitous ...