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This research is partially supported by the National Science Foundation, under grant ASC-9200301, and under the Alan T. Waterman award, grant CCR-9118874.
Authors' addresses:
- Nataraj Akkiraju: Mentor Graphics, 1001 Ridder Park Drive, San Jose, CA 95131.
- Herbert Edelsbrunner: Department of Computer Science, University of Illinois at Urbana-Champaign, Urbana, IL 61801.
- Michael Facello: Department of Computer Science and National Center for Supercomputing Applications, University of Illinois at Urbana-Champaign. Urbana, IL 61801.
- Ping Fu and Carlos Varela: National Center for Supercomputing Applications, University of Illinois at Urbana-Champaign, Champaign, IL 61820.
- Ernst P. Mücke: ANSYS, Inc., 201 Johnson Road, Houston, PA 15342. E-mail: epm@ansys.com
Questions and comments concerning the alpha shape software can be directed to: alpha@ncsa.edu

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