Enumerating Projective Reflection Groups

Details Enumerating Projective Reflection Groups Enumerating Projective Reflection Groups

2011-01-19

arxiv.org/abs/1101.3676v1

Mathematics

Combinatorics

Scientific paper

Projective re ection groups have been recently dened by the second author. They include a special class of groups denoted G(r; p; s; n) which contains all classical Weyl groups and more generally all the complex re ection groups of type G(r; p; n). In this paper we dene some statistics analogous to descent number and major index over the projective re ection groups G(r; p; s; n), and we compute several generating functions concerning these parameters. Some aspects of the representation theory of G(r; p; s; n), as distribution of one-dimensional characters and computation of Hilbert series of invariant algebras, are also treated.

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