By C. de Boor (auth.), R. V. M. Zahar (eds.)
R. V. M. Zahar* The sixty-fifth birthday of Walter Gautschi supplied an opportune second for a global symposium in his honor, to acknowledge his many contributions to arithmetic and laptop sciences. Conceived via John Rice and backed via Purdue college, the convention came about in West Lafayette from December 2 to five, 1993, and was once equipped round the 4 major issues representing Professor Gautschi's significant learn pursuits: Approximation, Orthogonal Polynomials, Quadrature and designated capabilities. Thirty-eight audio system - colleagues, co-authors, study collaborators or doctoral scholars of Professor Gautschi - have been invited to offer articles on the convention, their lectures supplying an nearly equivalent illustration of the 4 disciplines. 5 invited audio system, Germund Dahlquist, Philip Davis, Luigi Gatteschi, Werner Rheinboldt and Stephan Ruscheweyh, have been not able to give their talks as a result of ailment or different commitments, even if Professors Dahlquist, Gatteschi and Ruscheweyh thus contributed arti cles to those complaints. therefore, the ultimate software contained thirty-three technical lectures, ten of which have been plenary classes. nearly 80 scientists attended the convention, and for a few ses sions - specifically, Walter's presentation of his enjoyable and informative Reflections and memories - that quantity used to be complemented by way of many viewers and pals, in addition to the relations of the honoree. A shock stopover at by means of Paul Erdos supplied one of many highlights of the convention week. The atmosphere on the sym posium used to be tremendous collegial, due without doubt to the typical educational pursuits and the private friendships shared through the participants.
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Additional info for Approximation and Computation: A Festschrift in Honor of Walter Gautschi: Proceedings of the Purdue Conference, December 2–5, 1993
This discussion of Gauss elimination by segments was only given in order to indicate the many different ways available for constructing a factorization A = M R of a segmented matrix A = [Ao, At. 1 into an invertible M and a correspondingly segmented row-echelon form. The existence of such a factorization was never in doubt, as any factorization A = M R obtained by Gauss elimination with partial pivoting is seen to be of the desired form after R is appropriately blocked. 6 A "NATURAL" CHOICE FOR F We have already seen that a correct F can be so chosen that PF is degree-reducing.
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