"Certainly the best times were when I was alone with mathematics, free of ambition and pretense, and indifferent to the world." 

- Robert Langlands

Hello! My name is Jaeho Haan. 

My research area is number theory, particularly automorphic forms and the Langlands program.

My research interests include:

• Gan–Gross–Prasad conjecture

• Special values of L-functions

• Periods of automorphic forms

• Theta correspondence

• Non-tempered automorphic representations

More broadly, I am interested in understanding how non-tempered phenomena arise in period problems and what they reveal about the emerging framework of relative Langlands theory.

I love every aspect of mathematics. I enjoy thinking through complex problems, and I also find great joy in discussing and teaching mathematics at all levels.

Upcoming conferences!

• The Gross–Zagier Formula, 40 Years Later (ICM 2026 Satellite Conference, MIT, Cambridge, MA), August 3–7, 2026. 

Many thanks to KAIST and the organizers of the conference for full travel support. 

• Number Theory and Representation Theroy: The Legacy of Benedic Gross, and beyond (Conference, Harvard University, Cambridge, MA) March 15–19, 2027.

A conference honoring the mathematical legacy of Benedict (Dick) Gross. I hope to attend.

Recent talks!

- On the Non-tempered Gan-Gross-Prasad Conjecture, May 8, 2026, Korea University