Joseph W. H. Liu

Professor Emeritus

Joseph received his Ph.D. in Computer Science from the University of Waterloo in 1975. He is primarily interested in the area of sparse matrix technology and large-scale supercomputing. He is also interested in such related areas as: analysis of algorithms, parallel computation, graph theory, data structures, computational complexity, and software development. During the past decade his research has been supported by NSERC, the US Department of Energy and the US Air Force.

Together with Alan George, he co-authored the book Computer Solution of Large Sparse Positive Definitive Systems which was published with Prentice Hall in 1981. Joseph also developed the widely-used sparse matrix software package with Alan George and Esmond Ng.

Professor LiuĀ is Emeritus as of July 1, 2003.


(with A. George), “An object-oriented approach to the design of a user interface for a sparse matrix package”, SIAM J. Matrix Anal. and Applic. 20 (1999), 953-969.
(with J. Demmel, S. Eisenstat, J. Gilbert, S. Li), “A supernodal approach to sparse partial pivoting”, SIAM J. Matrix Anal. and Applic. 20 (1999), 720-755.
(with C. Ashcraft), “Robust ordering of sparse matrices using multisection”, SIAM J. Matrix Anal. and Applic. 19 (1998), 816-832.


Joseph W. H. Liu
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