MIME-Version: 1.0 Server: CERN/3.0 Date: Wednesday, 20-Nov-96 18:56:14 GMT Content-Type: text/html Content-Length: 3412 Last-Modified: Sunday, 17-Nov-96 23:57:57 GMT Stephen Vavasis

Stephen A. Vavasis

Associate Professor
Department of Computer Science
722 Rhodes Hall
Cornell University
Ithaca, NY 14853

email: vavasis@cs.cornell.edu
phone: 607-255-9213
fax: 607-255-4428

During the period 6/12/96 to 6/30/97, I am on sabbatical at:
MCS Division, Bldg 221
Argonne National Laboratory
9700 S. Cass Ave.
Argonne, IL 60439
email: vavasis@mcs.anl.gov
phone: 630-252-6735
fax: 630-252-5986
Note change in area code effective 8/3/96.

My research interest is numerical analysis. (You aren't sure what numerical analysis is? Please see the essay by my colleague L. N. Trefethen.) More specifically, I am interested in:

I have a few recent manuscripts available on-line:

The QMG package

I have recently completed a software project on mesh generation for the finite element method in three dimensions. The software package, called QMG, is available at the source code level by anonymous ftp. With QMG you can construct polyhedral geometric objects with very complicated topology (holes, internal boundaries, etc.) and automatically create an unstructured tetrahedral mesh for them. (The mesh generator is based on algorithmic work by Scott Mitchell and me.) You can also solve an elliptic boundary value problem (div (c*grad u)=0) on your domain. The package is written in C++ and Matlab and is distributed for free at the source-code level (anonymous ftp distribution began 5/5/95).

QMG 1.1 was released on 20 November 1996. QMG1.1 features many improvements over QMG1.0, including a faster mesh generation algorithm, VRML graphics, much cleaner C++ code, a boundary mesh generation algorithm, compatibility with Microsoft Windows NT as well as Unix, and compatibility with Tcl/Tk as well as Matlab.

Please see the on-line documentation.

Vavasis's page from the 1995 annual report

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