Noncommutative geometry on trees and buildings

Details Noncommutative geometry on trees and buildings Noncommutative geometry on trees and buildings

2006-04-05

arxiv.org/abs/math/0604114v1

Mathematics

Quantum Algebra

23 pages, LaTeX, 2 eps figures, contributed to a proceedings volume

Scientific paper

We describe the construction of theta summable and finitely summable spectral triples associated to Mumford curves and some classes of higher dimensional buildings. The finitely summable case is constructed by considering the stabilization of the algebra of the dual graph of the special fiber of the Mumford curve and a variant of the Antonescu-Christensen spectral geometries for AF algebras. The information on the Schottky uniformization is encoded in the spectral geometry through the Patterson-Sullivan measure on the limit set. Some higher rank cases are obtained by adapting the construction for trees.

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