with Günter Rote · Paper
Develops a geometric framework for understanding the 4-dimensional point groups through discrete Hopf fibrations and polar orbit polytopes, providing visual and structural insight into these symmetry groups.
with Rainer Sinn and Günter M. Ziegler · Paper
Studies the dimension of the realization space of convex polytopes, establishing new bounds and results for families of polytopes with restricted combinatorial types.
PhD thesis · Thesis
Doctoral dissertation combining two lines of research: the geometry of 4-dimensional point groups via discrete Hopf fibrations, and the dimension theory of realization spaces of convex polytopes.
with Günter Rote · Sequence
The number of finite subgroups of order n of the orthogonal group O(4). Sequence and accompanying table for n = 1..10000 computed as part of the research on 4-dimensional point groups.
with Günter Rote · Sequence
The number of finite subgroups of order n of the special orthogonal group SO(4). Sequence and accompanying table for n = 1..10000 computed as part of the research on 4-dimensional point groups.