3 papers
math.AT2001
Subalgebras of group cohomology defined by infinite loop spaces
John R. Hunton, Bjorn Schuster
We study natural subalgebras Ch_E(G) of group cohomology defined in terms of infinite loop spaces E and give representation theoretic descriptions of those based on QS^0 and the Jo…
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…
math.AT2000
Topological invariants for projection method patterns
Alan Forrest, John Hunton, Johannes Kellendonk
We analyze and compare different dynamical systems and groupoids which can be obtained from projection point patterns. We define the cohomology of a point pattern as the cocycle co…