34 citations · 100 across the 8 of their papers we have counts for
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math-ph2007★ 22 cited
The topological meaning of Levinson's theorem, half-bound states included
Johannes Kellendonk, Serge Richard
We propose to interpret Levinson's theorem as an index theorem. This exhibits its topological nature. It furthermore leads to a more coherent explanation of the corrections due to…
math.DS2007
Pattern equivariant functions, deformations and equivalence of tiling spaces
Johannes Kellendonk
We reinvestigate the theory of deformations of tilings using P-equivariant cohomology. In particular we relate the notion of asymptotically negligible shape functions introduced by…