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math-ph2005
A topological version of Levinson's theorem
Johannes Kellendonk, Serge Richard
In the framework of scattering theory, we show how the scattering matrix can be related to the projection on the bound states by an index map of K-theory. Pairings with appropriate…
math-ph2000
Cohomology groups for projection point patterns
Alan Forrest, John Hunton, Johannes Kellendonk
Aperiodic point sets (or tilings) which can be obtained by the method of cut and projection from higher dimensional periodic sets play an important role for the description of quas…