Showing 2018Show all
2 papers · 1 filter
math.NT2018
The density of visible points in the Ammann-Beenker point set
Gustav Hammarhjelm
The relative density of visible points of the integer lattice is known to be for , where is Riemann's zeta function. In this paper we prove tha…
math.RA2018
On the classification of rational four-dimensional unital division algebras
Gustav Hammarhjelm
In a paper by E. Dieterich 2017, the category of four-dimensional unital division algebras, whose right nucleus is non-trivial and whose automorphism group contain…