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Type: Text × Publisher: Oberwolfach : Mathematisches Forschungsinstitut Oberwolfach × Subject: Coxeter groups ×

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    An inductive approach to Coxeter arrangements and Solomon’s descent algebra
    (Oberwolfach : Mathematisches Forschungsinstitut Oberwolfach, 2011) Douglass, J.Matthew; Pfeiffer, Götz; Röhrle, Gerhard
    In our recent paper [3], we claimed that both the group algebra of a finite Coxeter group W as well as the Orlik-Solomon algebra of W can be decomposed into a sum of induced one-dimensional representations of centralizers, one for each conjugacy class of elements of W, and gave a uniform proof of this claim for symmetric groups. In this note we outline an inductive approach to our conjecture. As an application of this method, we prove the inductive version of the conjecture for nite Coxeter groups of rank up to 2.
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    A construction of hyperbolic coxeter groups
    (Oberwolfach : Mathematisches Forschungsinstitut Oberwolfach, 2010) Osajda, Damian
    We give a simple construction of Gromov hyperbolic Coxeter groups of arbitrarily large virtual cohomological dimension. Our construction provides new examples of such groups. Using this one can construct e.g. new groups having some interesting asphericity properties.