5 citations · 5 across the 4 of their papers we have counts for
4 papers
Extremal sizes of subspace partitions
Olof Heden, Juliane Lehmann, Esmeralda Nastase +1
A subspace partition of is a collection of subspaces of such that each 1-dimensional subspace of is in exactly one subspace of . The size of is the nu…
Some necessary conditions for vector space partitions
Olof Heden, Juliane Lehmann
Some new necessary conditions for the existence of vector space partitions are derived. They are applied to the problem of finding the maximum number of spaces of dimension t in a…
Equivariant closure operators and trisp closure maps
Juliane Lehmann
A trisp closure map is a special map on the vertices of a trisp T with the property that T collapses onto the subtrisp induced by the image of the map. We study the interaction bet…
Nested set complexes for posets and the Bier construction
Juliane Lehmann
We generalize the concept of combinatorial nested set complexes to posets and exhibit the topological relationship between the arising nested set complexes and the order complex of…