2 papers
math.MG2020
Triangles with Vertices Equidistant to a Pedal Triangle
Xuming Liang, Ivan Zelich
In this paper, we present a synthetic solution to a geometric open problem involving the radical axis of two strangely defined circumcircles. The solution encapsulates two generali…
math.CO2019
Counting acyclic and strong digraphs by descents
Kassie Archer, Ira M. Gessel, Christina Graves +1
A descent of a labeled digraph is a directed edge (s, t) with s > t. We count strong tournaments, strong digraphs, and acyclic digraphs by descents and edges. To count strong tourn…