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http://hdl.handle.net/2123/642
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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: | 27-Mar-2006 |
| 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. |
| URI: | http://hdl.handle.net/2123/642 |
| 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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