1 citations · 1 across the 6 of their papers we have counts for
6 papers
Profiniteness of higher rank volume
Holger Kammeyer, Steffen Kionke, Ralf Köhl
We show that the covolume of an irreducible lattice in a higher rank semisimple Lie group with the congruence subgroup property is determined by the profinite completion. Without r…
A mathematical framework to study organising principles in graphical representations of biochemical processes
Adittya Chaudhuri, Ralf Köhl, Olaf Wolkenhauer
The complexity of molecular and cellular processes forces experimental studies to focus on subsystems. To study the functioning of biological systems across levels of structural an…
Higher spin representations of maximal compact subalgebras of simply-laced Kac-Moody-algebras
Robin Lautenbacher, Ralf Köhl
Given the maximal compact subalgebra of a split-real Kac-Moody algebra of type , we study certain finite-dimensional representations of $\mat…
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…
The Siegel Modular Group is the Lattice of Minimal Covolume in the Symplectic Group
Amir Džambić, Kristian Holm, Ralf Köhl
Let . We prove that, up to conjugation, is the unique lattice in of the smallest covolume.
Kac-Moody Symmetric Spaces: arbitrary symmetrizable complex or almost split real type
Ralf Köhl, Christian Vock
Kac-Moody symmetric spaces have been introduced by Freyn, Hartnick, Horn and the first-named author for centered Kac-Moody groups, that is, Kac-Moody groups that are generated by t…