2003-04 Lecture Series: Mathematics Across the Disciplines Lecture #4: Finding the Collaboration in Collaborative Filtering Dr. Ben Keller Dr. Ben Keller has a Ph.D. and M.S. in computer science from Virginia Tech, and a B.S. from Western Kentucky University. His research has always been involved some form of mathematics: from logic and lattices in his M.S. (relating to Software Engineering) to noncommutative ring and homology theory in his Ph.D. (Computer Algebra). His current research activity involves understanding the mechanisms that make one recommender system work well and another not. This work regularly involves aspects of graph theory, linear algebra, numerical analysis, statistics and lately a dabbling in algebraic geometry. Dr. Keller has been an assistant professor in Computer Science at EMU since August 2002. He has also been faculty at Montana Tech of the University of Montana, and more recently at Virigina Tech.