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|Title: ||Buildings and Hecke Algebras|
|Authors: ||Parkinson, James William|
|Keywords: ||building;affine;Hecke algebra;Macdonald spherical function;random walk;harmonic analysis|
|Issue Date: ||2005|
|Publisher: ||University of Sydney. Mathematics and Statistics|
|Abstract: ||We establish a strong connection between buildings and Hecke algebras through the study of two algebras of averaging operators on buildings. To each locally finite regular building we associate a natural algebra B of chamber set averaging operators, and when the building is affine we also define an algebra A of vertex set averaging operators. In the affine case, it is shown how the building gives rise to a combinatorial and geometric description of the Macdonald spherical functions, and of the centers of affine Hecke algebras. The algebra homomorphisms from A into the complex numbers are studied, and some associated spherical harmonic analysis is conducted. This generalises known results concerning spherical functions on groups of p-adic type. As an application of this spherical harmonic analysis we prove a local limit theorem for radial random walks on affine buildings.|
|Rights and Permissions: ||Copyright Parkinson, James William;http://www.library.usyd.edu.au/copyright.html|
|Appears in Collections:||Sydney Digital Theses (Open Access)|
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