Welcome to my website

Hi, I am Jonathan and welcome to my webpage. I am a mathematician interested in analysis, probability, and combinatorics. My research focuses on applying linear algebra and probability theory to solve combinatorial problems.

I completed my undergraduate studies at Stanford University, where I worked on problems related to minimal and capillary surfaces. I studied how geometric boundary conditions can produce singular behavior in the resulting variational surfaces.

I completed my Master’s degree at Cal State LA, where I conducted research in combinatorics, including work on Cayley graphs, intersecting families, Ramsey Theory on bipartite graphs, and odd cover problems. My Master’s thesis explored extremal graph results on product graphs.

I am currently applying for Mathematics PhD programs.

How to use this site

The Math Notes section provides some of the background on the foundational results and techniques related to my research. In particular, I am currently working on notes for the following topics

  • Measure Theory
  • Extremal Graph Theory
  • Combinatorial Designs

In the future, I plan to add notes for Extremal Set Theory, Graph Limits, Stohastic Processes, Probabilitic Method, Entropy method, and more.

The Teaching section will include notes from past classes that I have taught at Cal State LA and a tutoring company. I included some projects to show practical applications of mathematics to biology, chemistry, and economics. I also have some fun problems to give to more advanced students to introduce them to open research problems.

The Research section contains some of the open problems I like to think about. Feel free to email me open problems that are well less known. If I find them interesting, I will add them to this section.

The Demos section of my webpage is dedicated to interactive visualizations and simulations of some interesting random geometric and/or combinatorial objects. I often use the simulations while giving talks in outreach programs or seminars. Feel free to use or share these simulations with others. (Disclaimer: I am a mathematician not a programmer. I have used AI to assist me in writing the Javascript simulations. I have looked over the code myself, but I cannot guarantee there are no bugs.)


Contact

Email: jonathan.j.davidson@gmail.com

Github: jjdavidson


© 2026 Jonathan Davidson. All rights reserved.