Abstract. We extend different Description Logics by concrete domains (such as integers and reals) and by aggregation functions over these domains (such as min;max;count;sum), which...
The Electrical Engineering Summer Academy for Pre-College Students was held at the University of Tulsa from June 11th through June 15th , 2007. Of the 20 students accepted, 19 par...
Peter LoPresti, Theodore W. Manikas, Jeff Kohlbeck
Given a category with a stable system of monics, one can form the corresponding category of partial maps. To each map in this category there is, on the domain of the map, an assoc...
We study properties of rough sets, that is, approximations to sets of records in a database or, more formally, to subsets of the universe of an information system. A rough set is a...
We close affirmatively a question which has been open for long time: decidability of the HOM problem. The HOM problem consists in determining, given a tree homomorphism D and a re...
Guillem Godoy, Omer Giménez, Lander Ramos and Car...