w LINEAR ALGEBRA AND ITS APPLICATIONS Special issue on Large Scale Linear and Nonlinear Eigenvalue Problems. CALL FOR PAPERS: In many different application areas there is an increasing and pressing need for new theory and numerical techniques for solving very large linear and nonlinear eigenvalue problems. Recent advances in computer hardware make it feasible to solve enormously large eigenvalue problems with millions of unknowns, but this increase in the problem size leads to several new numerical challenges. First, classical eigenvalue solvers that do not scale linearly with the problem size have become very expensive for practical problems. This has increased attention to alternative approaches such as preconditioning for eigenvalue problems. Secondly, due to the architecture of modern computers, there is a demand for parallel algorithms that are well scalable with respect to the number of computing nodes. Moreover the growth of the problem size often leads to badly conditioned problems, which require increased algorithm stability and novel tools to estimate the accuracy of computed eigenvalues and eigenvectors. In some large-scale applications, one needs to find eigenpairs of a matrix that is available only implicitly through a function that computes the corresponding vector-matrix product for a given vector, which thus calls for "matrix-free" eigensolvers. This special issue will be open for all papers with significant new results in Large Scale Linear and Nonlinear Eigenvalue Problems where either linear algebraic methods play an important role or new tools and problems of linear algebraic nature are presented. In addition, surveys papers are very welcome, in particular on specific application areas where the eigenvalue problems are especially challenging because of the large size. Papers must meet the publication standards of Linear Algebra and Its Applications and will be refereed in the usual way. The deadline for submission of papers is March 31, 2003, and the special issue is expected to be published in 2004. Papers should be sent to any of its special editors, preferably by email in the PostScript format: Zhaojun Bai Dept. of Computer Science University of California One Shields Avenue Davis, CA 95616 USA bai@cs.ucdavis.edu Phone: +1-530-752-4874 Fax: +1-530-752-4767 Andrew Knyazev Department of Mathematics University of Colorado at Denver P.O. Box 173364, Campus Box 170 Denver, CO 80217-3364. USA andrew.knyazev@cudenver.edu Phone: +1-303-556-8442 Fax: +1-303-556-8550 Henk A. Van der Vorst Mathematical Institute Utrecht University Mailbox 80.010 3508 TA UTRECHT The Netherlands vorst@math.uu.nl Phone: +31-30-2533732 Fax: +31-30-2518394 The responsible editor-in-chief of the special issue is: Volker Mehrmann Institut f. Mathematik, MA 4-5 TU Berlin Strasse des 17. Juni 136 D-10623 Berlin Germany e-mail: mehrmann@math.tu-berlin.de