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Author: Gary M. Seitz Publisher: American Mathematical Soc. ISBN: 0821825046 Category : Mathematics Languages : en Pages : 197
Book Description
The goal of this book is the determination of the maximal closed connected subgroups of the simple algebraic groups of exceptional type. The main result recovers the results of Dynkin and extends them to cover the case of algebraic groups over algebraically closed fields of positive characteristic.
Author: Martin W. Liebeck Publisher: American Mathematical Soc. ISBN: 0821804618 Category : Mathematics Languages : en Pages : 111
Book Description
The theory of simple algebraic groups is important in many areas of mathematics. The authors of this book investigate the subgroups of certain types of simple algebraic groups and obtain a complete description of all those subgroups which are themselves simple. This description is particularly useful in understanding centralizers of subgroups and restrictions of representations.
Author: Donna M. Testerman Publisher: American Mathematical Soc. ISBN: 0821824538 Category : Embeddings Languages : en Pages : 198
Book Description
Let [italic]Y be a simply-connected, simple algebraic group of exceptional type, defined over an algebraically closed field [italic]k of prime characteristic [italic]p > 0. The main result describes all semisimple, closed connected subgroups of [italic]Y which act irreducibly on some rational [italic]k[italic]Y module [italic]V. This extends work of Dynkin who obtained a similar classification for algebraically closed fields of characteristic 0. The main result has been combined with work of G. Seitz to obtain a classification of the maximal closed connected subgroups of the classical algebraic groups defined over [italic]k.
Author: Adam R. Thomas Publisher: American Mathematical Soc. ISBN: 1470443376 Category : Education Languages : en Pages : 191
Book Description
This paper is a contribution to the study of the subgroup structure of excep-tional algebraic groups over algebraically closed fields of arbitrary characteristic. Following Serre, a closed subgroup of a semisimple algebraic group G is called irreducible if it lies in no proper parabolic subgroup of G. In this paper we com-plete the classification of irreducible connected subgroups of exceptional algebraic groups, providing an explicit set of representatives for the conjugacy classes of such subgroups. Many consequences of this classification are also given. These include results concerning the representations of such subgroups on various G-modules: for example, the conjugacy classes of irreducible connected subgroups are determined by their composition factors on the adjoint module of G, with one exception. A result of Liebeck and Testerman shows that each irreducible connected sub-group X of G has only finitely many overgroups and hence the overgroups of X form a lattice. We provide tables that give representatives of each conjugacy class of connected overgroups within this lattice structure. We use this to prove results concerning the subgroup structure of G: for example, when the characteristic is 2, there exists a maximal connected subgroup of G containing a conjugate of every irreducible subgroup A1 of G.
Author: Martin W. Liebeck Publisher: American Mathematical Soc. ISBN: 0821834827 Category : Mathematics Languages : en Pages : 227
Book Description
In this paper, we complete the determination of the maximal subgroups of positive dimension in simple algebraic groups of exceptional type over algebraically closed fields. This follows work of Dynkin, who solved the problem in characteristic zero, and Seitz who did likewise over fields whose characteristic is not too small. A number of consequences are obtained. It follows from the main theorem that a simple algebraic group over an algebraically closed field has only finitely many conjugacy classes of maximal subgroups of positive dimension. It also follows that the maximal subgroups of sufficiently large order in finite exceptional groups of Lie type are known.
Author: Gary M. Seitz Publisher: American Mathematical Soc. ISBN: 0821824279 Category : Linear algebraic groups Languages : en Pages : 294
Book Description
Let [italic]V be a finite dimensional vector space over an algebraically closed field of characteristic p [greater than] 0 and let G = SL([italic]V), Sp([italic]V), or SO([italic]V). The main result describes all closed, connected, overgroups of [italic]X in SL([italic]V), assuming [italic]X is a closed, connected, irreducible subgroup of G.
Author: Ross Lawther
Author: Ross Lawther
Author: Gary M. Seitz
Author: Martin W. Liebeck
Author: Donna M. Testerman
Author: Adam R. Thomas
Author: Alastair J. Litterick
Author: Martin W. Liebeck
Author: Gary M. Seitz
Author: Ross Lawther
Author: David A. Craven