On the Generic Degrees of Cyclotomic Algebras

نویسنده

  • GUNTER MALLE
چکیده

We determine the generic degrees of cyclotomic Hecke algebras attached to exceptional finite complex reflection groups. The results are used to introduce the notion of spetsial reflection group, which in a certain sense is a generalization of the finite Weyl group. In particular, to spetsial W there is attached a set of unipotent degrees which in the case of a Weyl group is just the set of degrees of unipotent characters of finite reductive groups with Weyl group W , and in general enjoys many of their combinatorial properties.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Matrix Units and Generic Degrees for the Ariki–koike Algebras

The cyclotomic Hecke algebras were introduced by Ariki and Koike [2,4] and Broué and Malle [7]. It is conjectured [7] that these algebras play a rôle in the representation theory of reductive groups similar to (but more complicated than) that played by the Iwahori–Hecke algebras (see, for example, [8]). In particular, it should be possible to use these algebras to compute the degrees (and more ...

متن کامل

Towards Spetses I

We present a formalization using data uniquely de ned at the level of the Weyl group of the construction and combinatorial properties of unipotent character shea ves and unipotent characters for reductive algebraic groups over an algebraic closure of a nite eld This formalization extends to the case where the Weyl group is re placed by a complex re ection group and in many cases we get families...

متن کامل

Cyclotomic Nazarov–wenzl Algebras

Nazarov [Naz96] introduced an infinite dimensional algebra, which he called the affine Wenzl algebra, in his study of the Brauer algebras. In this paper we study certain “cyclotomic quotients” of these algebras. We construct the irreducible representations of these algebras in the generic case and use this to show that these algebras are free of rank r(2n − 1)!! (when Ω is u–admissible). We nex...

متن کامل

Cyclotomic Wenzl Algebras

Nazarov [Naz96] introduced an infinite dimensional algebra, which he called the affine Wenzl algebra, in his study of the Brauer algebras. In this paper we study certain “cyclotomic quotients” of these algebras. We construct the irreducible representations of these algebras in the generic case and use this to show that these algebras are free of rank r(2n − 1)!! (when Ω is u– admissible). We ne...

متن کامل

Symmetric Cyclotomic Hecke Algebras

In this paper we prove that the generic cyclotomic Hecke algebras for imprimitive complex reeection groups are symmetric over any ring containing inverses of the parameters. For this we show that the determinant of the Gram matrix of a certain canonical sym-metrizing form introduced in 3] is a unit in any such ring. On the way we show that the Ariki-Koike bases of these algebras are also quasi-...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2000