In this paper we give a new decomposition algorithm that breaks a multilevel relation into single-level relations and a new recovery algorithmwhich reconstructs the original multi...
This work presents methodological aspects related with the development of web-based collaboration systems in Design and Education. Collaboration is highlighted as the fundamental ...
We address the question of recognizing handwritten mathematics in Arabic and related languages. After presenting an overview of the major styles used to express mathematics in the...
We prove a conjecture of F. Chapoton relating certain enumerative invariants of (a) the cluster complex associated by S. Fomin and A. Zelevinsky with a finite root system and (b)...
We study line systems in metric spaces induced by graphs. A line is a subset of vertices defined by a relation of betweeness. We show that the class of all graphs having exactly k ...