37 citations · 62 across the 11 of their papers we have counts for
12 papers
Derangement Frequency in the Boolean Complex
Kari Ragnarsson, Bridget Eileen Tenner
In previous work, we associated to any finite simple graph a particular set of derangements of its vertices. These derangements are in bijection with the spheres in the wedge sum d…
On the composition product of saturated fusion systems
Sejong Park, Kári Ragnarsson, Radu Stancu
We say that a fusion system is the composition product of two subsystems if every morphism can be factored as a morphism in one fusion system followed by a morphism in the other. W…
Homology of the Boolean Complex
Kari Ragnarsson, Bridget Eileen Tenner
We construct and analyze an explicit basis for the homology of the boolean complex of a Coxeter system. This gives combinatorial meaning to the spheres in the wedge sum describing…
Completion of -spectra and stable maps between classifying spaces
Kári Ragnarsson
We prove structural theorems for computing the completion of a G-spectrum at the augmentation ideal of the Burnside ring of a finite group G. First we show that a G-spectrum can be…
Saturated fusion systems as idempotents in the double Burnside ring
Kari Ragnarsson, Radu Stancu
We give a new, unexpected characterization of saturated fusion systems on a p-group S in terms of idempotents in the p-local double Burnside ring of S that satisfy a Frobenius reci…
p-local finite group cohomology
Ran Levi, Kári Ragnarsson
We study cohomology for -local finite groups with non-constant coefficient systems. In particular we show that under certain restrictions there exists a cohomology transfer map…