3 citations · 19 across the 27 of their papers we have counts for
33 papers
Hodge Operators and Exceptional Isomorphisms between Unitary Groups
Linus Kramer, Markus J. Stroppel
We give a generalization of the Hodge operator to spaces endowed with a hermitian or symmetric bilinear form over arbitrary fields, including the characteristic two cas…
Hodge operators and groups of isometries of diagonalizable symmetric bilinear forms in characteristic two
Linus Kramer, Markus J. Stroppel
We study groups of isometries on non-alternating symmetric bilinear forms on vector spaces of characteristic two, and actions of these groups on exterior powers of the space, viewe…
A note on commutators in compact semisimple Lie algebras
Linus Kramer
Given two elements in a compact semisimple Lie algebra, we show that there is a regular element and elements with and . In the course of the proo…
Weyl Tensors, Strongly Regular Graphs, Multiplicative Characters, and a Quadratic Matrix Equation
Christopher Deninger, Theo Grundhöfer, Linus Kramer
We study solutions of a quadratic matrix equation arising in Riemannian geometry. Let be a real symmetric -matrix with zeros on the diagonal and let be a real nu…
Some remarks on proper actions, proper metric spaces, and buildings
Linus Kramer
We discuss various aspects of isometric group actions on proper metric spaces. As one application, we show that a proper and Weyl transitive action on a euclidean building is stron…
On Weakly Complete Universal Enveloping Algebras: A Poincare-Birkhoff-Witt Theorem
Karl H. Hofmann, Linus Kramer
We study universal enveloping Hopf algebras of Lie algebras in the category of weakly complete vector spaces over the real and complex field.