1 citations · 1 across the 2 of their papers we have counts for
3 papers
math.GR2024
Higher homotopy groups of topological Kac-Moody groups, Whitehead tower, and string groups
Ralf Köhl
This note establishes that homotopy groups of topological split real Kac-Moody groups are countable and, hence, concludes the existence of Whitehead towers consisting of topologica…
math.NA2023
Computing Maxwell eigenmodes with Bloch boundary conditions
Steffen Börm, Ralf Köhl, Nahid Talebi
Our goal is to predict the band structure of photonic crystals. This task requires us to compute a number of the smallest non-zero eigenvalues of the time-harmonic Maxwell operator…
math.RA2014★ 1 cited
Generalized spin representations. Part 2: Cartan-Bott periodicity for the split real En series
Max Horn, Ralf Köhl
In this article we analyze the quotients of the maximal compact subalgebras of the split real Kac-Moody algebras of the En series resulting from the generalized spin representation…