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Hitzelberger, Petra: Generalized affine buildings : automorphisms, affine Suzuki-Ree buildings and convexity. 2008
Inhalt
Introduction
Root systems, Weyl groups and lattices
Definition of root systems
The geometry of the affine Weyl group
Buildings: The simplicial approach
Spherical and affine buildings
Retractions
Kostant convexity
Dual convexity
Tools and preliminary results
Proof of theorem
Application and open problem
The model space
Definitions and basic properties
The metric structure of the model space
Convexity and parallelism
Generalized affine buildings
Basic definitions and properties
Local and global structure
Trees: affine buildings of dimension one
Automorphisms
The space of bowties
Extending automorphisms
Buildings for the Ree and Suzuki groups
Root data and valuations
Ree and Suzuki groups
Affine buildings for the Ree and Suzuki groups
Proof of the main result
Examples of invariant valuations
Convexity revisited
A geometric proof of 3.16
The convexity theorem
Loose ends
Proof of Theorem 5.40
Dictionary
Bibliography