92 citations · 117 across the 10 of their papers we have counts for
10 papers
Liftings of surfaces in the plane
Oleg Karpenkov, Brigitte Servatius, Herman Servatius
In this note we provide a topological definition of Maxwell-Cremona liftings for non-planar frameworks of surfaces (both oriented and non-oriented). In the non-oriented case we giv…
Counting for rigidity under projective transformations in the plane
Leah Wrenn Berman, Signe Lundqvist, Bernd Schulze +4
Let be a set of points and a set of lines in the (extended) Euclidean plane, and , where means that point and line are incid…
Projective rigidity of point-line configurations in the plane
Leah Berman, Signe Lundqvist, Bernd Schulze +4
In this paper, we establish a general setup for studying incidence-preserving motions of projective geometric configurations of points and lines via a "projective rigidity matrix".…
Canonical binary -matroids
Rémi Cocou Avohou, Brigitte Servatius, Herman Servatius
The handle slide operation, originally defined for ribbon graphs, was extended to delta-matroids by I. Moffatt and E. Mphako-Bandab, who show that, using a delta-matroid analogue o…
Maps and -matroids revisited
Rémi Cocou Avohou, Brigitte Servatius, Herman Servatius
Using Tutte's combinatorial definition of a map we define a -matroid purely combinatorially and show that it is identical to Bouchet's topological definition.
Generate -matroids from matroids
Rémi Cocou Avohou, Brigitte Servatius, Herman Servatius
We give necessary and sufficient conditions for two matroids on the same ground set to be the upper and lower matroid of a -matroid.