28 citations · 125 across the 26 of their papers we have counts for
39 papers
A cute proof that makes natural
Po-Shen Loh
The number has rich connections throughout mathematics, and has the honor of being the base of the natural logarithm. However, most students finish secondary school (and even u…
Flipping the Perspective in Contact Tracing
Po-Shen Loh
We introduce a fundamentally different paradigm for contact tracing: for each positive case, do not only ask direct contacts to quarantine; instead, tell everyone how many relation…
Large rainbow matchings in edge-colored graphs
Debsoumya Chakraborti, Po-Shen Loh
A subgraph of an edge-colored graph is called \emph{rainbow} if all of its edges have distinct colors. There has been much research on the topic of finding a large rainbow matching…
A Simple Proof of the Quadratic Formula
Po-Shen Loh
This article provides a simple proof of the quadratic formula, which also produces an efficient and natural method for solving general quadratic equations. The derivation is comput…
Extremal graphs with local covering conditions
Debsoumya Chakraborti, Po-Shen Loh
We systematically study a natural problem in extremal graph theory, to minimize the number of edges in a graph with a fixed number of vertices, subject to a certain local condition…
Minimizing the numbers of cliques and cycles of fixed size in an -saturated graph
Debsoumya Chakraborti, Po-Shen Loh
This paper considers two important questions in the well-studied theory of graphs that are -saturated. A graph is called -saturated if does not contain a subgraph iso…