Computation in Coxeter groups II. Minimal roots

Details Computation in Coxeter groups II. Minimal roots Computation in Coxeter groups II. Minimal roots

2002-09-03

arxiv.org/abs/math/0209020v1

Mathematics

Combinatorics

Scientific paper

In the recent paper (Casselman, 2001) I described how a number of ideas due to Fokko du Cloux and myself could be incorporated into a reasonably efficient program to carry out multiplication in arbitrary Coxeter groups. At the end of that paper I discussed how this algorithm could be used to build the reflection table of minimal roots, which could in turn form the basis of a much more efficient multiplication algorithm. In this paper, following a suggestion of Bob Howlett, I explain how results due to Brigitte Brink can be used to construct the minimal root reflection table directly and more efficiently.

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