IPNet Digest Volume 5, Number 03 March 30, 1998 Today's Editors: Patricia K. Lamm and Thomas L. Scofield Michigan State University Today's Topics: Query: Underdetermined Nonlinear Least Squares Query: Subsystem modeling/estimation Conference: Inverse Problems of Mathematical Physics Conferences: Discrete Math, Parallel Processing Position: Johannes Kepler Universitaet Linz Call for Papers: Special Issue, Real-Time Imaging Table of Contents: Inverse Problems Table of Contents: SIAM J. Mathematical Analysis Table of Contents: SIAM J. Control and Optimization Table of Contents: SIAM J. Scientific Computing Table of Contents: SIAM J. Matrix Analysis and Applications Table of Contents: Numerical Algorithms Table of Contents: Linear Algebra and Its Applications Submissions for IPNet Digest: Mail to ipnet-digest@math.msu.edu Information about IPNet: Mail to ipnet-request@math.msu.edu http://www.mth.msu.edu/ipnet ------------------------------ From: Miguel Velez-Reyes Subject: Underdetermined Nonlinear Least Squares Date: Mon, 02 Mar 1998 Saludos! I am interested in information about methods and algorithms (theory and implementation) for solving underdetermined nonlinear least square problems. I just started working with inverse problems in passive remote sensing using satellite imagery (optical and microwave). I will post a summary of responses Regards, Miguel Velez Dr. Miguel Velez-Reyes, PE Associate Professor, Electrical and Computer Engineering Department University of Puerto Rico Mayaguez Campus P.O. Box 9042 Mayaguez, PR 00681-9042 Tel. (787) 832-4040 Ext. 3086, 3094, 2888 FAX (787) 831-7564 e-mail: mvelez@exodo.upr.clu.edu m.velez@ieee.org ------------------------------ From: "Marc C. Steinbach" Subject: Subsystem modeling/estimation Date: Wed, 18 Mar 1998 Question: Literature on subsystem modeling/parameter estimation Suppose you have a complex system consisting of interacting subsystems, each with an approximate model depending on unknown parameters. From measurements at the whole system in different states, you wish to obtain information to improve the component models qualitatively, that is, find out which of the subsystem models are "good" or "poor" and, if possible, get hints "how" the poor models should be modified. The interactions are known accurately and the models are sufficiently smooth to perform gradient-based parameter estimation (Gauss-Newton). Reasonable "nominal" subsystem parameters are also known. Of course, estimating the whole parameter set, then fixing the nominal parameters of each subsystem and estimating the remaining ones, yields different residuals and thus information on "good" or "poor". Also, the Lagrange multipliers of the fixing conditions give local sensitivity information. Does anybody know about theoretical or practical work on this issue, or alternative approaches? Every hint is greatly welcome. Regards, Marc Steinbach (steinbach@na-net.ornl.gov) ------------------------------ From: Olga Klimenko Subject: Conference "Inverse Problems of Math. Physics" Date: Fri, 13 Mar 1998 ( WWW: http://www.math.nsc.ru/conference/ipmp98/main.html ) International Conference on INVERSE PROBLEMS OF MATHEMATICAL PHYSICS Novosibirsk, Russia September 21-25, 1998 First Announcement The Organizing Committee is pleased to announce that the International Conference "Inverse Problems of Mathematical Physics" will take place in Novosibirsk, Russia, from Monday, September 21, through Friday, September 25, 1998. The Institute of Computational Mathematics and Mathematical Geophysics of Siberian Branch of Russian Academy of Science, Sobolev Institute of Mathematics and Novosibirsk State University convene the International Conference. The main objective of the Conference is to provide a forum for presentation and discussions on recent developments in inverse problems of mathematical physics and applications in geophysics and tomography. The Chairman of the Organizing Committee is Prof. A.S. Alekseev, Director of the Institute of Computational Mathematics and Mathematical Geophysics. The Vice-Chairman is Prof. M.M. Lavrent'ev, Director of the Sobolev Institute of Mathematics. Mathematical Program The sections are as follows: 1. Mathematical modelling of geophysical fields A.S. Alekseev, V.M. Babich 2. Inverse problems of mathematical physics V.G. Romanov, A.M. Denisov 3. Problems of data processing for geophysical survey observations, geophysical informatics S.V. Goldin, A.V. Nikolaev 4. Theory of ill-posed problems M.M. Lavrent'ev, V.N. Strahov Organizing committee: Alekseev A.S., Lavrent'ev M.M., Romanov V.G. Klimenko O.A. ( Scientific Secretary), Anikonov D.S., Anikonov Yu.E., Atamanov E.R., Avdeev A.V., Babich V.M., Bidaibekov E.Y., Bukhgeim A.L., Denisov A.M., Fokin M.V., Goldin S.V., Iskenderov A.D., Kabanikhin S.I., Konovalov A.N., Mikhailov G.M., Nikolaev A.V., Priimenko V.I., Shokin Yu.,I., Smagin S.I., Strahov V.N., Tcheverda V.A., Vasin V.V., Yakhno V.G., Gottlieb J., Kasahara J., Lorenzi A. English and Russian are the official languages of the Conference. The deadline for submission of abstract and Registration Form is May 15, 1998. For more information contact Dr. Olga Klimenko : E-mail: klimenko@math.nsc.ru Ed. note: This submission has been edited for length. For more information about the conference, for a registration form and sample abstract, please consult the conference web page at: http://www.math.nsc.ru/conference/ipmp98/main.html ------------------------------ From: flores@siam.org Subject: Two SIAM Conferences Date: Thu, 26 Mar 98 Ninth SIAM Conference on DISCRETE MATHEMATICS July 12-15, 1998 University of Toronto Toronto, Ontario, Canada The conference program and registration, hotel, dormitory, and transportation information are now available. Visit the DISCRETE MATHEMATICS conference Web page at www.siam.org/meetings/dm98/ ================================== Ninth SIAM Conference on PARALLEL PROCESSING for SCIENTIFIC COMPUTING March 22-24, 1999 Adam's Mark San Antonio-Riverwalk Hotel San Antonio, Texas Submissions for a minisymposium proposal, a lecture or poster presentation are invited. For more information about the conference, when and how to submit a minisymposium proposal or a contributed abstract, visit the SIAM PARALLEL PROCESSING for SCIENTIFIC COMPUTING Conference Web page at www.siam.org/meetings/pp99/ ------------------------------ From: "PROF.HEINZ W. ENGL" Subject: Position in Linz Date: Thu, 05 Mar 1998 Position in Linz We will soon have an industry-funded 3-year position (renewable after each year) at the Johannes Kepler Universitaet Linz for a project with a large car company involving collision problems with tolerances; this is art of a long term cooperation, where we will be dealing with inverse problems of the type "How do certain tolerances in a CAD-construction have to be chosen in order to guarantee that the final part meets certain criteria (under all admissible tolerance situations) like, in a given motion, hitting or not hitting another part (again with tolerances)." I am looking for a mathematician with high computer-literacy, experience in object oriented programming, good geometric intuition and knowledge of optimization methods. Diploma or equivalent and EU citizenship required. Possibility of using the work to be done for a doctoral thesis. Salary around 380.000 Austrian Schilling before tax. Enquiries: Prof.Heinz Engl, engl@indmath.uni-linz.ac.at Prof.Dr.Heinz W. Engl E-Mail: engl@indmath.uni-linz.ac.at Institut fuer Industriemathematik secretary:nikolaus@indmath.uni-linz.ac.at Johannes-Kepler-Universitaet Phone:+43-(0)732-2468...,ext.9219 or 693, Altenbergerstrasse 69 secretary: ext.9220; as Dean: ext.3220 A-4040 Linz Fax:ext. 855, in Dean's affairs:ext.3225 Oesterreich / Austria WWW: http://www.indmath.uni-linz.ac.at/ ------------------------------ From: Emanuele Salerno Subject: CFP, Special Issue, Real-Time Imaging Date: Mon, 2 Mar 1998 I hereby submit the following Call for Papers for a special issue of the journal Real-Time Imaging. Best regards, Emanuele Salerno Call for Papers Real-Time Imaging Special Issue on "Fast Energy-Minimization-Based Imaging and Vision Techniques" Guest Editor: Emanuele Salerno, Istituto di Elaborazione della Informazione - CNR, Pisa, Italy Background Energy-minimization methods are powerful tools in all domains of imaging and computer vision. Many of them descend from Bayesian or variational approaches to solve the related inverse problems. Many numerical algorithms implementing these methods have been developed in last years for several applications, but, because of their exceedingly high computational complexity, their practical interest has been limited to those cases where real-time performance is not required. However, there are many applications for which the high quality of the solutions achievable with these methods is strongly desirable, and true real-time is not a strict constraint. Indeed, the term 'real-time' often has a relative meaning, depending on the application considered, the actual requirement being to have a 'reasonable' elapsed time. Notwithstanding these considerations, the speed performance of many energy-minimization algorithms is at present not sufficient for most applications. On the other hand, the development of computing power both in dedicated and general-purpose hardware is about to enable us to take some of these techniques to practical usefulness. This justifies from a practical point of view the continued research interest in energy-minimization methods. Two main strategies can be identified in order to face these problems. From an architectural point of view, an effort should be made to fully exploit existing architectures for the implementation of the algorithms, or to design special hardware, best suited for particular tasks. From an algorithmic point of view, the search for new mathematical models and/or computational schemes should be directed towards a better tractability of the problems. Moreover, the generality of some approaches can be reduced to obtain algorithms that are either intrinsically less expensive or more suitable for particular high-performance machines. Scope All the contributions to solve (or approaching a solution of) one of the problems raised above are welcome to this special issue. A (not exhaustive) list of suggested sub-topics is the following: 1. Algorithmic aspects 1.1 Mathematical models 1.2 Fast numerical procedures 1.3 Specialized algorithms 1.4 Parallel implementations 2. Architectural aspects 2.1 Hardware development methodologies 2.2 Distributed computing approaches 2.3 Innovative architectures 2.4 VLSI implementations 3. Applications 3.1 Pattern recognition 3.2 Image segmentation 3.3 Autonomous vehicle guidance 3.4 Robot motion control 3.5 Remote sensing 3.6 Medical imaging 3.7 Industrial inspection 3.8 Visual data bases All enquiries can be addressed to the guest editor, at the following email address: e.salerno@iei.pi.cnr.it Submission of papers Authors should send five copies of their manuscripts to Dr. E. Salerno, at the following address: Emanuele Salerno (Real-Time Imaging) IEI-CNR Via Santa Maria, 46 I-56126 Pisa, Italy Each manuscript should contain a cover page with the title and an abstract, and the indication of the two sub-topics that best match the subject treated in the paper (as said, the above list is not exhaustive). Submission deadline All the contributions should be received by 31 October 1998. ------------------------------ From: Janet Thomas Subject: Inverse Problems Contents list Date: Fri, 20 Mar 1998 Inverse Problems April 1998 Volume 14, Issue 2 Table of Contents PAPERS Inverse problem on the line without phase information T. Aktosun and P. E. Sacks Regularization wavelets and multiresolution W. Freeden and F. Schneider Inverse problems: recovery of BV coefficients from nodes O. H. Hald and J. R. McLaughlin On matrix inverse eigenvalue problems X. R. Ji Constructing integrable third order systems: the Gambier approach S. Lafortune, B. Grammaticos and A. Ramani Reconstructing the potential function and its derivatives using nodal data C. K. Law and C-F Yang Hartig's law and linear elasticity with initial stress C-S Man On the information content of the radiated fields in the near zone over bounded domains R. Pierri and F. Soldovieri Exterior and limited-angle tomography in non-destructive evaluation E. T. Quinto On multidimensional Darboux transformations P. C. Sabatier INVERSE PROBLEMS NEWSLETTER Why not visit the Inverse Problems home page at http://www.iop.org/Journals/ip? Submitted by: Janet Thomas, Production Editor Institute of Physics Publishing Dirac House, Temple Back, Bristol BS1 6BE, UK Tel: +44 (0)117 930 1081 Fax: +44 (0)117 929 4318 E-mail: janet.thomas@ioppublishing.co.uk WWW: http://www.iop.org ------------------------------ From: thomas@siam.org Subject: Contents, SIAM Journal on Mathematical Analysis Date: Wed, 11 Mar 98 SIAM Journal on Mathematical Analysis March 1998 Volume 29, No. 2 Table of Contents Behaviors of Solutions for the Burgers Equation with Boundary Corresponding to Rarefaction Waves Tai-Ping Liu, Akitaka Matsumura, and Kenji Nishihara Some Overdetermined Boundary Value Problems with Elliptical Free Boundaries Antoine Henrot and Gerard A. Philippin On a Fourth-Order Degenerate Parabolic Equation: Global Entropy Estimates, Existence, and Qualitative Behavior of Solutions Roberta Dal Passo, Harald Garcke, and Gunther Grun Boundary Layers in the Homogenization of a Spectral Problem in Fluid-Solid Structures Gregoire Allaire and Carlos Conca Smoothness Between Coefficients and Boundary Values for the Wave Equation Gang Bao Time-Harmonic Electromagnetic Fields in Thin Chiral Curved Layers H. Ammari and J. C. Nedelec Bifurcation Structure of Stationary Solutions of a Lotka-Volterra Competition Model with Diffusion Yukio Kan-on On the Properties of Some Nonlinear Eigenvalues Angelo Alvino, Vincenzo Ferone, and Guido Trombetti Linear Parabolic Stochastic PDEs and Wiener Chaos R. Mikulevicius and B. Rozovskii Construction of Multiscaling Functions with Approximation and Symmetry G. Plonka and V. Strela The Lifting Scheme: A Construction of Second Generation Wavelets Wim Sweldens SIAM Journal on Mathematical Analysis May 1998 Vol. 29, No. 3 Table of Contents The Shape of the Tallest Column Steven J. Cox and C. Maeve McCarthy Slow Dynamics of Interfaces in the Allen-Cahn Equation on a Strip-Like Domain Shin-Ichiro Ei and Eiji Yanagida An Extension of Marchioro's Bound on the Growth of a Vortex Patch to Flows with L^p Vorticity M. C. Lopes Filho and H. J. Nussenzveig Lopes Nonlinear Instability of a Precessing Body with a Cavity Filled by an Ideal Fluid Andrei A. Lyashenko and Susan J. Friedlander On the Chapman-Jouguet Limit for a Combustion Model Bernard Hanouzet, Roberto Natalini, and Alberto Tesei On Maxwell's Equations in an Electromagnetic Field with the Temperature Effect Hong-Ming Yin All-Time Existence of Classical Solutions for Slightly Compressible Flows Thomas Hagstrom and Jens Lorenz The Second Stekloff Eigenvalue and Energy Dissipation Inequalities for Functionals with Surface Energy Robert Lipton Global Stability in Chemostat-Type Equations with Distributed Delays Xue-Zhong He, Shigui Ruan, and Huaxing Xia Recovery of Singularities of a Multidimensional Scattering Potential Lassi Paivarinta and Valeri Serov Radial Symmetry and Decay of Variational Ground States in the Zero Mass Case M. Flucher and S. Muller L-infinity Estimates on the Solutions of Nonselfadjoint Elliptic and Parabolic Equations in Bounded Domains Adrian T. Hill Analysis of Concentration and Oscillation Effects Generated by Gradients Irene Fonseca, Stefan Muller, and Pablo Pedregal Solutions of Finitely Smooth Nonlinear Singular Differential Equations and Problems of Diagonalization and Triangularization Harry Gingold and Alexander Tovbis Orthogonal Polynomials and Cubature Formulae on Spheres and On Balls Yuan Xu Convolutions for Orthogonal Polynomials from Lie and Quantum Algebra Presentations H. T. Koelink and J. Van der Jeugt Submitted by: Kelly Thomas, Managing Editor ------------------------------ From: smiley@siam.org Subject: Contents, SIAM Journal on Control and Optimization Date: Wed, 18 Mar 98 SIAM Journal on Control and Optimization May 1998 Volume 36, No. 3 Table of Contents Equilibrium Conditions for Young Measures Pablo Pedregal Differential Games with Unbounded versus Bounded Controls Franco Rampazzo Asynchronous Stochastic Approximations Vivek S. Borkar Boundary Value Problems and Optimal Boundary Control for the Navier-Stokes System: The Two-Dimensional Case A. V. Fursikov, M. D. Gunzburger, and L. S. Hou Existence of an Optimal Solution of a Shape Control Problem for the Stationary Navier-Stokes Equations Max D. Gunzburger and Hongchul Kim Central Limit Theorem and Law of Iterated Logarithm for Least Squares Algorithms in Adaptive Tracking Bernard Bercu Stochastic Near-Optimal Controls: Necessary and Sufficient Conditions for Near-Optimality Xun Yu Zhou The Symmetric Rendezvous-Evasion Game Steve Alpern and Wei Shi Lim An Integral Invariance Principle for Differential Inclusions with Applications in Adaptive Control E. P. Ryan Optimal Boundary Control of the Stokes Fluids with Point Velocity Observations Puhong You, Zhonghai Ding, and Jianxin Zhou Globally and Superlinearly Convergent Algorithm for Minimizing a Normal Merit Function Elijah Polak and Liqun Qi Ergodic Boundary/Point Control of Stochastic Semilinear Systems T. E. Duncan, B. Maslowski, and B. Pasik-Duncan Proximal Analysis and the Minimal Time Function Peter R. Wolenski and Yu Zhuang A Classical Approach to Uniform Null Controllability for Elastic Beams Miguel Angel Moreles Exponential Decay of Energy of the Euler-Bernoulli Beam with Locally Distributed Kelvin-Voigt Damping Kangsheng Liu and Zhuangyi Liu Optimal Control of Inflation: A Central Bank Problem Maria B. Chiarolla and Ulrich G. Haussmann From:Ira D. Smiley, Production Editor ------------------------------ From: odonnell@siam.org Subject: Contents, SIAM Journal on Scientific Computing Date: Fri, 27 Mar 98 SIAM Journal on Scientific Computing May 1998 Vol. 19, No 3 Table of Contents Three-Dimensional Front Tracking James Glimm, John W. Grove, Xiao Lin Li, Keh-Ming Shyue, Yanni Zeng, and Qiang Zhang Design and Application of a Gradient-Weighted Moving Finite Element Code I: In One Dimension Neil N. Carlson and Keith Miller Design and Application of a Gradient-Weighted Moving Finite Element Code II: In Two Dimensions Neil N. Carlson and Keith Miller A Study of Some Finite Difference Schemes for a Unidirectional Stochastic Transport Equation Harald Osnes and Hans Petter Langtangen Computational Considerations for the Simulation of Shock-Induced Sound Jay Casper and Mark H. Carpenter Numerical Solution of a Flow-Control Problem: Vorticity Reduction by Dynamic Boundary Action Martin Berggren Hamilton-Based Numerical Methods for a Fluid-Membrane Interaction in Two and Three Dimensions Maria Cristina Recchioni and Giovanni Russo An Iterative Perturbation Method for the Pressure Equation in the Simulation of Miscible Displacement in Porous Media Ping Lin and Daoqi Yang Domain Decomposition Operator Splittings for the Solution of Parabolic Equations T. P. Mathew, P. L. Polyakov, G. Russo, and J. Wang A Fast Poisson Solver of Arbitrary Order Accuracy in Rectangular Regions A. Averbuch, M. Israeli, and L. Vozovoi A Generalized SOR Method for Dense Linear Systems of Boundary Element Equations K. Davey and S. Bounds A Sparse Approximate Inverse Preconditioner for Nonsymmetric Linear Systems Michele Benzi and Miroslav Tuma Approximate Inverse Preconditioners via Sparse-Sparse Iterations Edmond Chow and Yousef Saad Generalized Capacitance Matrix Theorems and Algorithm for Solving Linear Systems Shang-Hong Lai and Baba C. Vemuri Computing Limit Loads by Minimizing a Sum of Norms Knud D. Andersen, Edmund Christiansen, and Michael L. Overton Submitted by: Keely O'Donnell, Editorial Associate ------------------------------ From: wunderlich@siam.org Subject: Contents, SIAM Journal on Matrix Analysis and Applications Date: Wed, 04 Mar 98 SIAM J. on Matrix Analysis and Applications April 1998 Vol. 19, No. 2 Table of Contents Stable and Efficient Algorithms for Structured Systems of Linear Equations Ming Gu H-Selfadjoint and H-Unitary Matrix Pencils Ilya Krupnik and Peter Lancaster Applications of the Dulmage-Mendelsohn Decomposition and Network Flow to Graph Bisection Improvement Cleve Ashcraft and Joseph W. H. Liu Sign Controllability: Sign Patterns that Require Complete Controllability Michael J. Tsatsomeros More on Concavity of a Matrix Function Jurgen Gross On the Relationship Between Graphs and Totally Positive Matrices J. M. Pena The QR Decomposition and the Singular Value Decomposition in the Symmetrized Max-Plus Algebra Bart De Schutter and Bart De Moor On the Block Independence in Reflexive Inner Inverse and M-P Inverse of Block Matrix Yiju Wang On the Sandwich Semigroups of Group Boolean Matrices Cen Jianmiao Perturbation Analysis for the Cholesky Downdating Problem Xiao-Wen Chang and Christopher C. Paige Single-Input Eigenvalue Assignment Algorithms: A Close Look Mark Arnold and Biswa Nath Datta A Cubically Convergent Parallelizable Method for the Hermitian Eigenvalue Problem Hongyuan Zha and Zhenyue Zhang Simultaneous Contractibility Tsuyoshi Ando and Mau-hsiang Shih Determinant Maximization with Linear Matrix Inequality Constraints Lieven Vandenberghe, Stephen Boyd, and Shao-Po Wu Overcoming Instability in Computing the Fundamental Matrix for a Markov Chain Daniel P. Heyman and Dianne P. O'Leary Quadratic Residual Bounds for the Hermitian Eigenvalue Problem Roy Mathias The Relation Between the QR and LR Algorithms Hongguo Xu Complementation in Stochastic Matrices and the GTH Algorithm E. Seneta Condition Numbers of Random Triangular Matrices D. Viswanath and L. N. Trefethen Submitted by: Deidre Wunderlich, Production Editor ------------------------------ From: Baltzer Science Subject: Numerical Algorithms contents Date: Tue, 3 Mar 1998 Numerical Algorithms 1997 Volume 16, Number 1 Table of Contents Special issue: Second Symposium on New Techniques for the Treatment of Sparse Matrices for Industrial Problems Preface: Second Symposium on New Techniques for the Treatment of Sparse Matrices for Industrial Problems Sparse approximate inverse preconditioning for dense linear systems arising in computational electromagnetics Guillaume Alleon, Michele Benzi and Luc Giraud Two-dimensional block partitionings for the parallel sparse Cholesky factorization B. Dumitrescu, M. Doreille, J.-L. Roch and D. Trystram Direct and iterative solvers for finite-element problems J.P. Gregoire, C. Rose and B. Thomas Parallel computation of spectral portrait of large matrices by Davidson type methods Vincent Heuveline, Bernard Philippe and Miloud Sadkane The computation of bounds for the norm of the error in the conjugate gradient algorithm Gerard Meurant Numerical Algorithms 1997 Volume 16, Number 2 Table of Contents On the computation of the Smith normal form of compound matrices M. Mitrouli and C. Koukouvinos Improving performance when solving high-order and mixed-order boundary value problems in ODEs W.H. Enright and Min Hu Fourth order algorithms for a semilinear singular perturbation problem Relja Vulanovic Convergence and stability of the finite difference scheme for nonlinear parabolic systems with time delay Qiming He, Lishan Kang and D.J. Evans Detection of discontinuities in scattered data approximation Tim Gutzmer and Armin Iske Faster than the Fast Legendre Transform, the Linear-time Legendre Transform Yves Lucet Rational approximation in the complex plane using a \tau-method and computer algebra Luc Rebillard Nordsieck representation of DIMSIMs J.C. Butcher, P. Chartier and Z. Jackiewicz Numerical Algorithms 1997 Volume 16, Numbers 3,4 Table of Contents Numerical solution of fractional order differential equations by extrapolation Kai Diethelm and Guido Walz Evaluation of Chebyshev pseudospectral methods for third order differential equations Rosemary Renaut and Yi Su Irregularity detection from noisy data in one and two dimensions Milvia Rossini Sard-optimal prefilters for the Fast Wavelet Transform Sven Ehrich Error expansions for multidimensional trapezoidal rules with Sidi transformations P. Verlinden, D.M. Potts and J.N. Lyness A delay differential equation solver based on a continuous Runge-- Kutta method with defect control W.H. Enright and H. Hayashi A discrete divergence-free basis for finite element methods Xiu Ye and Charles A. Hall Claude Brezinski Book reviews More information about contents, submission and preparation of papers can be found on http://www.baltzer.nl/numa/ Please direct enquiries about subscription and other issues to subscribe@baltzer.nl Baltzer Science Publishers ------------------------------ From: Hans Schneider Subject: Linear Algebra and Its Applications, 7738, Vol 274, Iss 1-3 Date: Wed, 4 Mar 1998 Linear Algebra and Its Applications March 1998 Volume 274/01-03 Table of Contents Inequalities For The Q-Permanent II A. K. Lal The number of regular semisimple classes of special linear and unitary groups P. Fleischmann An inequality for the Spectral Radius of an interval matrix Mauhsiang Shih Similarity classes for nilpotent operators over dedekind domains G. D. Appleby On an estimate of the eigenvalues for an infinite-dimensional matrix and its application to the problem of the completeness of an eigenvector system of a completely continuous operator V. Strauss Sur l'image et la noyau d'une derivation generalisie A. Seddick Generalized inversion of block Toeplitz matrices V.M. Adukov Classification of hereditary matrices Agler, J.W. Helton Generalized Algebraic Structures for the Representation of Discrete Systems Thomas Moeller The inertia of certain Hermitian block matrices C.M. Da Fonseca Parallelizable approximate solvers for recursions arising in preconditioning Y. Shapira On a class of multi-parameter perturbations of positive-definite operators with fixed bounds of spectrum S.M. Malamud Canonical form of symplectic matrix pencils A. Ferrante Multiplicity of solutions of second order linear differential equations on networks J.A. Lubary The discrete algebraic Riccati equation and linear matrix inequality A. A. Stoorvogel Recursive properties of Toeplitz and Hurwitz matrices Marilena Barnabei On geometric properties of the numerical range M.T. Chien On a problem of Lewin J. Shen Please note that only one author is given for each paper. Submitted by: Hans Schneider hans@math.wisc.edu. Department of Mathematics 608-262-1402 (Work) Van Vleck Hall 608-263-8891 (Work FAX) 480 Lincoln Drive http://math.wisc.edu/~hans (URL) University of Wisconsin-Madison Madison WI 53706 USA ------- end -------