ACM Communications in Computer Algebra, Vol. 41, No. 4, December 2007 Dissertation Abstracts Abstracts of Recent Doctoral Dissertations in Computer Algebra Communicated by Ilias Kotsireas In this issue we continue our new section of the ACM Communications in Computer Algebra on the abstracts of recent doctoral dissertations in Computer Algebra and Symbolic Computation. We encourage all recent Ph.D. graduates (and their supervisors), who have defended in the past year, to submit their abstracts for publication here. We hope you agree that this is a great way to bring attention to the young researchers in our eld, and see the new directions of their research. Please send abstracts to the CCA editors for consideration. Symbolic Computation Techniques for Solving Large Expression Problems from Mathematics and Engineering Dr. Wenqin Zhou Applied Mathematics Department, University of Western Ontario, London,Ontario, CANADA. (publish.uwo.ca/~wzhou25/) Supervisors: David J. Je rey and Gregory J. Reid External examiner: Ilias S. Kotsireas Thesis committee: Robert M. Corless, Marc Moreno Maza, and Jerzy M. Floryan. Defence date: April 19, 2007 This thesis studies the use of computer algebra methods to solve some large-expression problems from mathematics and engineering. We give several strategies for solving problems from symbolic linear algebra
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