Joonsoo Lee

collaborators

2 papers

math.CO2020

Outdegree conditions forcing short cycles in digraphs

Dan Ismailescu, Joonsoo Lee, Andrew Yang

Given a positive integer $m \geq 3$ , let $c h (m)$ be the smallest positive constant with the following property: \emph{ Every simple directed graph on $n \geq 3$ vertices all whose outd…

math.MG2019

Grid dissections of tangential quadrilaterals

Erica Choi, Dan Ismailescu, Jiho Lee +1

For any integer $n \geq 2$ , a square can be partitioned into $n^{2}$ smaller squares via a checkerboard-type dissection. Does there such a class-preserving grid dissection exist for so…