13 citations · 49 across the 16 of their papers we have counts for
4 papers · 1 filter
A property of the Birkhoff polytope
Barbara Baumeister, Frieder Ladisch
The Birkhoff polytope is the convex hull of all permutation matrices in . We compute the combinatorial symmetry group of the Birkhoff poly…
Classification of Affine Symmetry Groups of Orbit Polytopes
Erik Friese, Frieder Ladisch
Let be a finite group acting linearly on a vector space . We consider the linear symmetry groups of orbits , where the \emph{linear sy…
Groups with a nontrivial nonideal kernel
Frieder Ladisch
We classify finite groups , such that the group algebra, (over the field of rational numbers ), is the direct product of the group algebra $\mathbb{Q}[…
Realizations of abstract regular polytopes from a representation theoretic view
Frieder Ladisch
Peter McMullen has developed a theory of realizations of abstract regular polytopes, and has shown that the realizations up to congruence form a pointed convex cone which is the di…