Hi, I am Hyein Choi. I am a postdoc in Anna Wienhard's group at Max Planck Institute for Mathematics in the Science. I received my PhD under the supervision of David Fisher at Rice University.

I am broadly interested in Groups, Geometry, and Rigidity

• Lie groups, Symmetric spaces, Buildings

• Large-scale geometry, Nonpositive curvature

• Group actions, Expanders, Random walks