125 citations · 229 across the 3 of their papers we have counts for
3 papers
math-ph2004★ 43 cited
Boundary maps for -crossed products with R with an application to the quantum Hall effect
Johannes Kellendonk, Hermann Schulz-Baldes
The boundary map in K-theory arising from the Wiener-Hopf extension of a crossed product algebra with R is the Connes-Thom isomorphism. In this article the Wiener Hopf extension is…
math-ph2002★ 61 cited
Pattern equivariant functions and cohomology
Johannes Kellendonk
The cohomology of a tiling or a point pattern has originally been defined via the construction of the hull or the groupoid associated with the tiling or the pattern. Here we presen…
cond-mat.mes-hall1999★ 125 cited
Simultaneous quantization of edge and bulk Hall conductivity
H. Schulz-Baldes, J. Kellendonk, Th. Richter
The edge Hall conductivity is shown to be an integer multiple of which is almost surely independent of the choice of the disordered configuration. Its equality to the bulk…