Dear User of Geometry Center Software:

We would like to find out how you are using our software.  Think of
Geometry Center software as a new kind of shareware: you share your
science and successes with us, and we share our software and support
with you. 

If you use Geometry Center software, please send us a note telling
us what you are doing with it.

We need to know:

  (1) What you are working on - an abstract of your work would be
      fine.

  (2) What Geometry Center software you use.

  (3) How that software has helped you, for example, by increasing
      your productivity or allowing you to do things you could not do
      before.  In particular, if you feel that Geometry Center
      software has had a direct bearing on your work, please tell us
      about this.

We encourage you to cite the use of any Geometry Center software you
have used in your publications.  

To cite Qhull, use

    Barber, C.B., Dobkin, D.P., and Huhdanpaa, H.T., "The Quickhull 
	algorithm for convex hulls," ACM Trans. on Mathematical Software,
	Dec 1996.  http://www.geom.umn.edu/software/qhull

Please send e-mail to

    qhull@geom.umn.edu

Thank you!