About me

I am an EWon Assistant Professor (distinguished tenure-track faculty) at KAIST since February, 2017. Before joining KAIST, I was a postdoctoral researcher at University of Bonn from Sep. 2014 to Jan. 2017.

I got Ph.D. in Mathematics at Cornell University in Aug. 2014 under the supervision of Bill Thurston, John Hubbard, and Dylan Thurston.

I was at UC Davis as a visiting graduate student with the guidance of Joel Hass in the academic year 2012-2013.

Throughout my graduate school years, Bill changed the way I view Mathematics completely. Here is one of my favorite quotes.

"When the moment of understanding Thurston finally hits you, the amount of pleasure you get is infinite" - Jean-Pierre Otal

There are still many advices/comments I got from Bill which I do not fully understand. I hope someday I will be able to make a single coherent picture out of all these small pieces he gave to me. Certainly all of my Math is built upon what he taught to me.


I completed an undergraduate degree in Mathematics at KAIST (Korea Advanced Institute of Science and Technology). In 2009, I came to Cornell and started working with Bill Thurston on hyperbolic geometry and low-dimensional topology.


I like traveling, taking photos, and enjoying good food with my friends.

Countries Visited

Both Koreas (there was a special tour program to Geum-gang mountain in North Korea for South Korea for a limited period of time, and I participated in it), USA, Canada, Uruguay, Ireland, Germany, Netherlands, France, Italy, Spain, Belgium, Luxembourg, Czech Republic, Singapore, Hongkong, China, Thailand, Japan, Malaysia, Australia, UK, Switzerland, Mexico, Croatia, Taiwan, Vietnam.

States in USA Visited

New York, Connecticut, Tennessee, Pennsylvania, Rhode Island, California, New Jersey, Maryland, Texas, Oklahoma, Florida, Indiana, Michigan, Nevada, Utah, D.C.

Places I want to visit

Madagascar, Egypt, Cambodia, Greece, The Antarctic.

My favorite poster so far