Send mail to: mgnet@cs.yale.edu for the digests or bakeoff mgnet-requests@cs.yale.edu for comments or help Current editor: Craig Douglas douglas-craig@cs.yale.edu Anonymous ftp repository: ftp.ccs.uky.edu (128.163.209.106) World Wide Web: http://www.mgnet.org or http://www.cerfacs.fr/~douglas/mgnet.html or http://phase.etl.go.jp/mgnet or http://www.ccs.uky.edu/mgnet Today's editor: Craig Douglas (douglas-craig@cs.yale.edu) Volume 8, Number 6 (approximately June 30, 1998) Today's topics: Movement Dissertation Preprint from Yousef Saad and Jun Zhang DAGH: 1-p processor adaptive grid refinement 2D/3D code and tutorial Contents of NLA 10th GAMM Multigrid Workshop Program DD11 preliminary program Iterative Symposium ------------------------------------------------------- Date: Fri, 19 Jun 1998 18:12:37 +0200 From: Craig DouglasSubject: Movement While at the 60th birthday workshop in honor of Dietrich Braess at Bochum, Gabriel Wittum announced that he is moving to Heidelberg. His institute will, of course, follow him. ------------------------------------------------------- Date: Tue, 23 Jun 1998 11:02:28 +0200 From: Stefan Reitzinge Subject: Dissertation Robust Algebraic Multigrid Methods in Magnetic Shielding Problems Stefan Reitzinger Johannes Kepler University Institut fur Mathematik Altenbergerstrasse 69 A-4040 Linz Austria Abstract The aim of this diplom thesis is to provide a robust and efficient solver for large sparse and poor conditioned linear systems arising from the FE-method for elliptic scalar PDEs of second order. For a counter example the problem of magnetic shielding is used. Therefore the Maxwell's equations for stationary objects are reduced to a scalar PDE of second order with appropriate boundary conditions. In order to solve the equation by means of FEM, a discretization for micro scales is introduced. Especially long thin elements are suggested to keep the number of unknowns small in areas of micro structures. Constructively a finite element analysis is carried out where also a convergence result of the FE-solution in H ^{1}is presented. To achieve an efficient and robust solution strategy the algebraic multigrid method of Ruge and Stueben is introduced. Additionally three different areas of application are presented for this AMG method, i.e. preconditioner, coarse grid solver for a full multigrid method, and black box solver. Because this AMG method normally works well for M-matrices, a technique is presented to attain M-matrices, if the underlying linear system arises from an FE-discretization. The method to achieve the M-matrix property is based on the element matrices. The algorithm was implemented as black box solver in the finite element package FEPP. Therein AMG was applied as preconditioner for the conjugate gradient method. Some numerical experiments are presented, where long thin quadrilaterals are used with ratio of the longest and shortest side of 1 to 10^{-3}. Additionally parameter jumps of order 10^{-6}to 10^{+6}are considered. Concluding AMG has been proven, at least in a numerical way, to be an efficient and robust solver for magnetic shielding problems, if it is used as a preconditioner for the CG-method. If long thin quadrilaterals are used for discretization the modified preconditioner also behaves very robust. Editor's Note: in www.mgnet.org/mgnet-papers.html or you can directly ------------- access it in mgnet/papers/Reitzinger/diplom.ps.gz ------------------------------------------------------- Date: Tue, 23 Jun 1998 13:50:58 -0500 (CDT) From: Jun ZhangSubject: Preprint from Yousef Saad and Jun Zhang We are happy to announce the following preprint. Enhanced Multi-Level Block ILU Preconditioning Strategies for General Sparse Linear Systems Yousef Saad and Jun Zhang Department of Computer Science and Engineering University of Minnesota 200 Union Street S.E., Minneapolis, MN 55455 saad@cs.umn.edu, jzhang@cs.umn.edu ABSTRACT This paper introduces several strategies to deal with pivot blocks in multi-level block incomplete LU factorization (BILUM) preconditioning techniques. These techniques are aimed at increasing the robustness and controlling the amount of fill-in of BILUM for solving large sparse linear systems when large size blocks are used to form block independent sets. Techniques proposed in this paper include double dropping strategies, regularization via Singular Value Decomposition, variable size blocks, and use of arrowhead block submatrix. We point out the advantages and disadvantages of these strategies techniques and discuss their efficient implementations. Numerical experiments are conducted to show the usefulness of these techniques in dealing with hard-to-solve problems arising from computational fluid dynamics. In addition, we discuss the relation between multi-level ILU preconditioning methods and algebraic multi-level methods. Postscript file of the above preprint may be downloaded from the following web pages: http://www.cs.umn.edu/~saad or http://www.cs.umn.edu/~jzhang For those who do not have access to web, you can access the paper via anonynmous ftp at the ftp site ftp.cs.umn.edu (cd /users/saad/reports then get the compressed post-script file: umsi-98-98.ps.gz). If all fails thend send an e-mail to jzhang@cs.umn.edu for a postscript file or a hard copy. ------------------------------------------------------- Date: Thu, 04 Jun 1998 20:15:28 -0500 From: Craig Douglas Subject: DAGH: 1-p processor adaptive grid refinement 2D/3D code and tutorial James C. Browne of the University of Texas (browne@cs.utexas.edu) has allowed me to put a stable version of his code DAGH (Distributed Adaptive Grid Hierarchy). It is co-authored by M. Parashar (parashar@cs.utexas.edu). It includes multigrid as an option. The code solves problems in two and three dimensions using 1 or more processors. The code is a C++ library. Additionally, a tutorial on parallel adaptive grid refinement techniques is included. To quote from the tutorial: The goals for the tutorial are: To acquaint you with the adaptive mesh refinement (AMR) technique for the solution of partial differential equations. To familiarize you with the conceptual frame work of DAGH and how it is implemented. To provide you with a working knowledge of DAGH interfaces through annotated examples. After you have gone through this tutorial you will be able to write a driver for DAGH and run it in either sequential or parallel mode. Editor's Note: The code is in www.mgnet.org/mgnet-codes.html and the ------------- tutorial is in www.mgnet.org/mgnet-tuts.html or you can access both of them directly in the directory www.mgnet.org/Codes/dagh. ------------------------------------------------------- Date: Wed, 24 Jun 1998 08:56:34 +0200 (MET DST) From: Maya Neytcheva Subject: Contents of NLA ==================================================================== CONTENTS Numerical Linear Algebra with Applications Volume 5, Issue 1, 1998 ---------------------------------------------- A note on the normwise perturbation theory for the regular generalized eigenproblem V. Fraysse and V. Toumazou A parallel multisplitting solution of the Least Squares problem R.A. Renaut Harmonic projection methods for large nonsymmetric eigenvalue problems R. Morgan and Min Zeng Efficient computation of sparse approximate inverses T.K. Huckle ==================================================================== CONTENTS Numerical Linear Algebra with Applications Volume 5, Issue 2, 1998 ---------------------------------------------- Approximating minimum norm solutions of rank-deficient Least Squares problems A. Dax and L. Elden On the performance of various adaptive preconditioned GMRES strategies K. Burrage and J. Erhel On parallel solution of linear elasticity problems. Part I: Theory I. Gustafson and G. Lindskog ==================================================================== CONTENTS Numerical Linear Algebra with Applications Volume 5, Issue 3, 1998 ---------------------------------------------- Estimating the largest eigenvector by Lanczos and polynomial algorithms with a random start Z. Leyk and H. Wozniakowski Analysis of matrix-dependent multigrid algorithms Y. Shapira The structure of the boundary element matrix for the three-dimensional Dirichlet problem in elasticity S. Rjasanow Indefinitely preconditioned inexact Newton method for large sparse equality constrained nonlinear programming problems L. Lucsan and J. Vlcek ------------------------------------------------------- Date: Thu, 02 Jul 1998 14:57:32 +0200 From: GAMM Workshop on Multigrid Methods Subject: 10th GAMM Multigrid Workshop Program We have posted the abstracts of all accepted presentations along with a preliminary schedule on the MG10 web page http://wwwwissrech.iam.uni-bonn.de/mg10 Frank Kiefer & Gerhard Zumbusch University Bonn for the MG10 Local Organizing Committee ------------------------------------------------------- Date: Tue, 30 Jun 1998 07:25:01 -0500 From: Craig Douglas Subject: DD11 preliminary program The domain decomposition symposia will meet for the 11th time from July 20-24, 1998 at the University of Greenwich - Avery Hill Campus. Here is the preliminary program that is on the web (http://dd11.gre.ac.uk/programme.html). Monday July 20th Opening of the Conference (Session Chair: M Cross) (NST) 8:45-9:00 Opening Speech - Dr D Fussey, Vice-Chancellor Invited Papers (Session Chair: P Bjorstad) (NST) 9:00-9:30 Domain decomposition solvers for incompressible fluid flow. E M RONQUIST 9:30-10:00 Domain decomposition methods for non-symmetric problems. F NATAF 10:20 Session A: Parasol 1 (Minisymposium Chair: P Bjorstad) (NST) 10:20 - Parasol Overview. Petter BJORSTAD | 10:30 - Industrial requirements. Jochen WEIHER 11:00 - PARASOL interface. John REID 12:30 11:30 - Schwarz and Schur solvers. Eero VAINIKKO 12:00 - A parallel p-element solver. Ulrich TROTTENBERG Session B: Multigrid 1 (Session Chair: P Deuflhard) (M140) 10:20 - A new algorithmic approach to multigrid homogenization. Folkmar BORNEMANN 10:40 - A 2-level micro-macro approach in domain decomposition for structural analysis. David DUREISSEIX, Pierre Ladeveze 11:00 - A multigrid method for the solution of the eigenvalue problem of the complex Helmholtz equation. T FRIESE, F Schmidt 11:20 - Multilevel substructuring preconditioners with projectors. Yu KUZNETZOV 11:40 - Simulation numerique par methode variationnelle multigrille spectrale du problems de Stokes generalise: Stokes - Oldroyd. M MENOUARD, B Gay, Ben Mostapha 12:00 - Multilevel-splitted norms for interface problems. Peter OSWALD 1:45 Session A: Parasol 2 (Minisymposium Chair: P Bjorstad) (NST) 1:45 - Direct solvers. P AMESTOY, I S Duff, J-Y L'Excellent, | P Plechac 2:15 - The FETI solver. F-X ROUX methods 3:05 2:45 - Panel discussion Session B: Towards black box routines for parallel and distributed computing (Minisyposium Chair: F Nataf) (M140) 1:45 - How black are black box solvers? A user's perspective. M KERN 2:05 - Parallel solution of irregularly structured sparse linear systems with PSPARLIB. Y SAAD 2:25 - Using PETSc to build and use parallel and distributed applications. William GROPP, Satish Balay, Lois Curfman McInnes, Barry Smith 2:45 - Remarks on the implementation of the balancing Neumann-Neumann domain decomposition algorithm. Marina VIDRASCU Session C: Sub-space correction (Session Chair: R Hoppe) (H016) 1:45 - Some computational approaches to constructing coarse spaces in domain decomposition methods. Tarek P MATHEW 2:05 - Robust subspace correction methods for thin elastic shells. E E Ovtchinnikov, L S XANTHIS. 2:25 - Global convergence of subspace correction methods for convex optimisation problems. Xue-Cheng TAI, Jinchao Xu 2:45 - Subspace definition for a multigrid method on unstructured grids. Jinchao Xu, Ludmil ZIKATANOV Invited Papers (Session Chair: M Cross) (NST) 3:30-4:00 How scalable is domain decomposition in practice? D E KEYES 4:00-4:30 Sound propagation near wedge-shaped pine in the water. H KAWARADA, H Suito and T Kakahashi 4:30 Session A: Parallel Computing 1 (Session Chair: D E Keyes) (NST) | 4:30 - An overview on current multiphysics simulation software strategies for coupled applications with interacting 6:10 physics on parallel and distributed computers. Peter Chow, Cliff ADDISON. 4:50 - Minimum overhead data partitioning scheme for parallel video processing. D Turgay ALTILAR, Yakup Parker 5:10 - Communication latency hiding in a parallel conjugate gradient method. Kevin MCMANUS, Steve Johnson, Mark Cross 5:30 - Comparing two parallel algorithms for non-linear metal cutting problems. C J PALANSURIYA, C S Ierotheou, D E Keyes, C-H Lai, K A Pericleous 5:50 - Parallel computingusing domain decomposition for cyclical temperatures in ceramic/metal composites. GUO QINGPING, D Parkinson, XIAO Jinsheng, Y Parker Session B: Multigrid 2 (Session Chair: J Xu) (M140) 4:30 - A multilevel domain decomposition method for high-order discretisation. Grabriel Mateescu, Calvin J RIBBENS 4:50 - BPX-preconditioned fully adaptive mulotigrid for micromagnetic problems. Igor TSUKERMAN, Alexander Plaks 5:10 - V-Cycle multigrid methods for Wilson nonconforming finite element. Z C SHI, Xue-Jun Xu Session C: Grid Refinement and Partitioning 1 (Session Chair: M G Everett) (H016) 4:30 - A new paradigm for parallel adaptive mesh refinement. Randolph E BANK, Michael J Holst 4:50 - A multilevel spectral partitioning algorithm for unstructured grids. Tony F CHAN, Susie Go, Jun Zou 5:10 - Identifying good metrics for mesh partitionign for distributed systems. Jian CHEN, Valerie E Taylor 6:30- Welcome Reception at the Senior Common Room, Avery Hill Conference Centre. Tuesday July 21st Invited Papers (Session Chair: I G Graham) (NST) 9:00-9:30 Adaptive multilevel FEM as decisive tools in the clinical cancer therapy hyperthermia. P DEUFLHARD 9:30-10:00 FETI - H: A scalarable domain decomposition method for the solution of high frequency exterior Helmholtz problems. C FARHAT 10:20 Session A: Sparse Grid Methods 1 (Minisymposium Chair: M Griebel) (NST) | 10:20 - Is there a curse of dimension for tensor product problems. Erich NOVAK 12:30 10:40 - On optimal and universal methods of approximate recovery of multivariate functions. Vladimir TEMLYAKOV 11:00 - Sparse grid quadrature formulas for the solution of partial differential and integral equations. Thomas GERSTNER 11:20 - Finite difference schemes on sparse grids for time dependent problems. Gerhard ZUMBUSCH 11:40 - Optimal approximation of singular functions by sparse grid functions. Peter OSWALD 12:00 - Application of adaptive sparse grids for a model singular perturbation problem. Jaap NOORDMANS Session B: Non-linear Problems 1 (Minisymposium Chair: M Espedal) (M140) 10:20 - A non-overlapping domain decomposition method for a time dependent optimal control problem: applications to an ocean circulation Aicha BOUNAIM 10:40 - Domain decomposition in high-level parallelisation of PDE codes. Xing CAI 11:40 - Domain decomposition methods for a system of coupled scalar and vector Helmholtz equations. Xiabing FENG 11:20 - On the accuracy of a domain decomposition method for metal sheet cutting. C-H LAI, C Ierotheou, C J Palansuriya, K A Pericleous 11:40 - Overlapping domain decomposition and multigrid methods for inverse problems. X-C TAI, J Fryon, M S Espedal, T F Chan 1:45 Session A: Sparse Grid Methods 2 (Minisymposium Chair: H-J Bungartz) (NST) | 1:45 - Adaptive finite element methods on sparse grids. Stefan SCHNEIDER, H-J Bungartz, Christoph Zenger 3:05 2:05 - Implementational aspects of the prewavelet sparse grid method. Andread Niedermeier, Stefan ZIMMER 2:25 - Sparse grid spectral methdds and some results from approximation. Friedrich KUPKA 2:45 - Panel Discussion Session B: Non-linear Problems 2(Minisymposium Chair: X-C Tai) (M140) 1:45 - On Schwarz alternating methods for the 2-d incompressible Navier-Stokes equations. S H LUI 2:05 - Parallel space decomposition methods for Lipschitz continuous functionals. Andreas FROMMER, Rosemary A Renaut 2:25 - A characteristic domain decomposition method for advection-diffusion equations with interfaces. H Wang, Mohamed AL-LAWATIA 2:45 - Panel Discussion Invited Papers (Session Chair: B Engquist) (NST) 3:30-4:00 Recent development of overlapping Schwarz methods and applications in compressible flow simulations. X-C CAI 4:00-4:30 Preconditioning operators for elliptic problems with bad parameters. S NEPOMNYASCHIKH 4:30 Session A: Novel Applications 1 (Session Chair: K Pericleous) (NST) | 4:30 - A two-model compressible flow formulation based on the full potential and Euler equations. X-C Cai, M PARASCHIVOIU, M 6:10 Sarkis 4:50 - A single-code software model for multiphysics analysis engine on parallel and distributed computers with the PHYSICA toolkit. Peter CHOW, Cliff Addison, Chris Bailey, Kevin McManus, Mark Cross 5:10 - Sound generation by vortex-blade interactions. G S DJAMBAZOV, C-H Lai, K A Pericleous 5:30 - Numerical simulation of wave propagation phenomena in vocal tract and domain decomposition method. Takashi KAKO, T Kano Session B: Schwarz Methods (Session Chair: O Widlund) (M140) 4:30 - Non-overlapping Schwarz waveform relaxation for time dependent problems. M J GANDER, L Halpern, F Nataf 4:50 - Generalised additive Schwarz method on overlapping non-matching grids. Serge GOOSSENS 5:10 - Applications of unstructed additive Schwarz methods. L STALS, I G Graham, M J Hagger Session C: Grid Refinement and Partitioning 2 (Session Chair: M Berzins) (H016) 4:30 - Optimal domain decomposition of hybrid grids for a target parallel architecture. M LEATHAM 4:50 - Load measures and mesh partitioning methods for adaptive hp finite elements. A PATRA, D W Kim 5:10 - Interpolation errors and two refinement strategies for tetrahedra. I TSUKERMANN, A Plaks 5:30 - Load balancing for steady computation using adaptive unstructured grids. S K Kochuguev, E I Levin, A I ZHMAKIN Wednesday July 22nd 8:00 Graduate Paper Competition 1 (Session Chair: R Glowinski) (NST) 8:00 - Parallel implementation of spectral element method | with nonconforming mesh. Huiyu FENG, C Mavriplis 8:20 - Numbering techniques for the multigrid solution of 12:40 convection dominated problems. Sabine GUTSCH 8:40 - Eigenvalue estimation and preconditioning to additive Schwarz method. W HE 9:00 - Block preconditioners for non-symmetric saddle piont problems. Piotr KRZYZANOWSKI 9:20 - On the choice of a Krylov method for the domain decomposition iterative solution of the exterior Helmholtz problem. A PUPPIN-MACEDO 9:40 - An adaptive h-p finite element code on quads and triangles. Guido NABH Graduate Paper Competition 2 (Session Chair: T F Chan) (NST) 10:20 - Some results on overlapping Schwarz methods for the Helmholtz equation employing perfectly matched layers. A TOSELLI 10:40 - Parallel turbulent combustion simulations using domain decomposition with multigrid. A TWERDA, R L Verweij, A F Bakker 11:00 - Parallel domain decomposition for reaction-diffusion problems. M Bercovier, N VOLFOVSKY 11:20 - FETI domain decomposition algorithms for sensitivity analysis in contact shape optimisation. Vit VONDRAK, Z Dostal 11:40 - Newton-Krylov-Schwarz methods for the solution of aerodynamics problems on structured and unstructured grids. Dinesh KAUSHIK, David Keyes, L C McInnes, B F Smith 12:00 - Static mapping of FEM-Mesh on parallel processor. L C MAIARU 12:20 - Domain decomposition and parallel processing microwave applicator design. D H MALAN, A C Metaxas 6:30- Conference Banquet at Trafalgar Tavern, Park Row, Greenwich, London SE10. Thursday July 23rd Invited Papers (Session Chair: X-C Cai) (NST) 9:00-9:30 Some recent applications of domain decomposition methods to flow problems. A QUARTERONI 9:30-10:00 Overlapping Schwarz methods for the Helmholtz equations. M CASARIN 10:20 Session A: Porous Media (Minisymposium Chair: Jean Roberts) (NST) | 10:20 - Domain decomposition methods in porous media simulations. R E Ewing 12:30 10:40 - Control-volume mixed finite element methods and efficient domain decomposition solvers for heterogeneous groundwater flow equations. Thomas F RUSSELL, R R Parashkevov, J D Wilson. 11:00 - Domain decomposition for two-phase flow in a porous medium with two rock types. J Jaffre, J Roberts, Xuewen WANG 11:20 - Domain decomposition methods for fractured reservoir models. M S ESPEDAL, G E Fladmark, H Reme, G A Oye 11:40 - Domain decomposition procedures for some nonconforming methods. Ivan YOTOV, M F Wheeler 12:00 - Domain decomposition for porous media with fractures. C ALBOIN, J Jaffre, J Roberts Session B: Algorithms 1 (Session Chair: A Quarteroni) (M140) 10:20 - Convergence of asynchronous multisplitting two-stage iterations for block systems fo weakly nonlinear equations. Zhong-Zhi BAI, D J Evans 10:40 - The block-grid method of increased accuracy in solving the mixed boundary value problem for the Laplace equation on polygon. A A OSIYEV 11:00 - A domain decomposition method with Lagrange multiplers for second order elasticity. Axel KLAWONN, O B Widlund 11:20 - On a non-overlapping domain decomposition method for scalar parabolic initial-boundary value problems. Gert LUBE, L Mueller, F - C Otto 11:40 - Decomposition method and strategy for coordination in optimal design of mechanical engineering systems. Carlos MARTINS, J Guillot 12:00 - Domain decomposition methods and artificial far-field boundary conditions for compressible viscous flows around airfoils. C COCLICI, W L Wenland 1:45 Session A: Viscous-Inviscid Coupling (Minisymposium Chair: A E P Veldman) (NST) | 1:45 - Viscous-inviscid interaction: domain decomposition 'avant la lettre'. A E P VELDMAN 3:05 2:05 - Quas-simultaneous viscous-inviscid coupling for aerofoil flows. E G M COENEN 2:25 - Application of a quasi-Newton method in viscous-inviscid coupling. C-H LAI, A E P Veldman 2:45 - Panel Discussion Session B: Sub-Structuring Methods (Session Chair: A Craig) (M140) 1:45 - Substructuring method for p1 non-conforming finite element discretisations. GU, Jinsheng and Jiu, Quansen 2:05 - On a robust and sparse approximation to the interface operators in substructuring methods for elliptic problems. Boris N KHOROMSIJ, G Wittum 2:25 - Incorporation of linear multipoint constraints in substructure based iterative solvers. Catherine LACOUR 2:45 - Analysis of substructuring in a metal forming process. A MEULLER, P Adamidis, A Beck, Y Ding, M Muench, A Reuter Session C: Algorithms 2 (Session Chair: Z-C Shi) 1:45 - A least squares method for the Helmholtz equation. Peter MONK, D-Q Wang 2:05 - The Schur complement as a mass matrix in mode synthesis eigenvalue problems. F Bourquin, Rabah NAMAR 2:25 - Domain decomposition methods for time-dependent problems of mathematical physics. A A Samarshii, P N VABISHCHEVICH 2:45 - Application of the FETI method to industrial acoustic problems governed by the Helmholtz method. J-P Coyette, F MAGOULES, K Meerbergen, F-X Roux Invited Papers (Session Chair: M Ainsworth) (NST) 3:30-4:00 Adaptive multilever finite element methods in domain decomposition on nonmatching grids. R HOPPE 4:00-4:30 Enhanced convergence rate from asymptotic expansions in domain decompositon. B ENGQUIST 4:30 Session A: Novel Application 2 (Session Chair: K Chen) (NST) 4:30 - FETI solver for corotational nonlinear problems. | Kendall PIERSON, M Lesoinne 4:50 - An iterative Krylov-based accelerating method for the 6:10 solution to large-scale nonlinear problems. F Risler, Christian REY 5:10 - The use of domain decomposition for approximating the conformal map of a quadrilateral onto a rectangle. Nikos STYLIANOPOULOS 5:30 - Specifc methods in symmetric structures analysis. Andrei VASILESCU Session B: Mortar Element + Fictitious Domain Methods (Session Chair: Yu Kuznetsov) (M140) 4:30 - Spectral element method and mortars to study a glaciological problem in Antarctica. Renaud LESTRINGANT 4:50 - The FETI method for mortar finite elements. Axel Klawonn, Dan STEFANICA 5:10 - Numerical simulation of 3D particulate flows by a domain embedding method. Roland Glowinski, Tsorng-Whay PAN, J Periaux 5:30 - A fictitious domain method elasticity problems. R A E Makinen, T Rossi, Jari TOIVANEN Session C: Elliptic Problems (Session Chair: S Nepomnyaschikh) (H016) 4:30 - Defect correction and domain decomposition for second order boundary value problems. Ahmed-Salah CHIBI, K Nafa 4:50 - Optimal algorithms of solution of elliptic equations. I V BOIKOV, A I Boikova 5:10 - The composite grids method of increased accuracy in solving the mixed boundary value problem for the Laplace equation. A A DOSIYEV, M Bozer Friday July 24th Invited Papers (Session Chair: C Farhat) (NST) 9:00-9:30 Hybrid boundary element methods in 3D. I G GRAHAM 9:30-10:00 Parallel unstructured tetrahedral mesh algorithms for transient compressible and reacting flow problems using domain decomposition. M BERZINS 10:20 Session A: Boundary elements (Session Chair: I G Graham) (NST) 10:20 - Parallel flexible elimination algorithms for dense | linear systems with applications to boundary elements. Ke CHEN, C-H Lai 12:30 10:40 - Domain decomposition for weakly singular integral equations. Norbert HEUER 11:00 - A monotone multigrid method for solving unilateral problems using the Galerkin boundary element method. Matthias MAISCHAK 11:20 - Boundary elements in domain decomposition. O STEINBACH 11:40 - Solutions of complex linear systems resulting from unsteady aerodynamics. Chak W CHEUNG, C-H Lai Session B: Interfacial Iterations (Session Chair: F Nataf) (M140) 10:20 - Fine tuning interface relaxation schemes for elliptic differential equations. J R Rice, P Tsompanopoulou, E VAVALIS 10:40 - Domain decomposition algorithms for singular perturbation parabolic problems. Igor BOGLAEV 11:00 - Domain decomposition with local Fourier basis applied to frontal polymerisation problems. M Garbey, D TROMEUR-DERVOUT 11:20 - Coervice domain decomposition algorithms for advection-diffusion equations and systems. Ana Alonso, R Loredana TROTTA, A Valli 11:40 - Legredre spectral collocation for the biharmonic Dirichlet problem. Bernard BIALECKI, A Karageorghis Session C: Parallel Computing 2 (Session Chair: M Espedal) (H016) 10:20 - Dynamic load balancing for multi-physical modelling. V ARAVINTHAN, K McManus, S Johnson, M Cross 10:40 - Parallel solution techniqus for the p-version finite element method. M PAPADRAKAKIS, D C Harbis 11:00 - The parallel solution of early-exercise Asian options with stochastic volatitlity. Kevin PARROTT, N Clarke 11:20 - Parallel solvers for the transient multigroup neturon diffusion equations. Robert SCHEICHL 11:40 - Scalability and load imbalance for domain decomposition based transport. P WILDERS 12:00 - A new approach to parallelising finite element computations. Jinchao XU, A Zhou 2:00 Invited Papers (Session Chair: H Kawarada) (NST) | 2:00 - 2:30 Domain decomposition for hp-finite element approximation. M AINSWORTH 3:30 2:30 - 3:00 Title to be announced. J PERIAUX 3:00 - 3:30 Tea and close ------------------------------------------------------- Date: Thu, 2 Jul 1998 10:54:46 -0500 From: "David R. Kincaid" Subject: Iterative Symposium Fourth IMACS International Symposium on Iterative Methods in Scientific Computation (Celebrating David M. Young's 75th birthday) October 18-20, 1998 University of Texas at Austin NEW Deadlines: August 15, 1998: Contributed talks September 15, 1998: Early registration Theme is iterative methods for solving large sparse linear systems in scientific computation with focus on past, present, and future. Current and former students, friends, and associates of Professor David Young are particularly welcome and are urged to participate. To contribute talks or register, see Web site http://www.ticam.utexas.edu/dmy98/ or send email to dmy98@ticam.utexas.edu For additional information Dr. David R. Kincaid RLM 13.150 -- C1300 Center for Numerical Analysis University of Texas at Austin Austin, TX 78713-8510 USA Tel: (512) 471-1242 Fax: (512) 471-9038 email: kincaid@cs.utexas.edu ------------------------------ End of MGNet Digest **************************