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What's new?

If you are a new user of cdd/cdd+ please read Section 2 (Introduction) first.

Both cdd+-075 and cdd-061 are a sort of maintenance releases which accept an updated Polyhedra format with ``H-representation'' and ``V-representation'' statements. This is to make a better compatibility with a recent release (version 3.2) of David Avis's code lrs [Avi97].

Also, we added three additional options ``zero_tolerance'', ``round_output_off'' and ``output_digits'', to cdd+-075. The first one is to set a zero tolerance of floating-point computation, and the latter ones are to control the format of output numbers.

Note that I have newly created a document [Fuk97], called Polyhedral Computation FAQ, which is to help the cdd/cdd+ users to make an efficient and appropriate use of polyhedral computations. In particular, the document explains how one can compute the Voronoi diagrams, the Delaunay complex (triangulation), using programs like cdd+ and lrs [Avi97].



Komei Fukuda
Mon Dec 1 18:08:10 GMT+0100 1997