4 papers · 1 filter
The Inverse Mapper Problem for Two-Dimensional Data
Robin Belton, Patrick Schnider
The Mapper algorithm is a popular graphical tool for data visualization and exploration in topological data analysis (TDA). It takes as input a data set and returns a graph tha…
Bowties and Hourglasses: Intersections of Double-Wedges (or Stabbing and Avoiding Line Segments)
Daniel Bertschinger, Henry Förster, Fabian Klute +3
We study the common intersection of arrangements of double-wedges. We consider arrangements where double-wedges may be either bowties (which do not contain a vertical line) or hour…
Garment numbers of bi-colored point sets in the plane
Oswin Aichholzer, Helena Bergold, Simon D. Fink +3
We consider colored variants of a class of geometric-combinatorial questions on -gons and empty -gons that have been started around 1935 by Erdős and Szekeres. In our setting…
Splitting Sandwiches Unevenly via Unique Sink Orientations and Rainbow Arrangements
Michaela Borzechowski, Sebastian Haslebacher, Hung P. Hoang +2
The famous Ham-Sandwich theorem states that any point sets in can be simultaneously bisected by a single hyperplane. The -Ham-Sandwich theorem gives a suffici…