Home › Events › Colloquium: Zhouli Xu - Massachusetts Institute of Technology Colloquium: Zhouli Xu - Massachusetts Institute of Technology Time: Mon, Feb 3 at 4:00 pm – 5:00 pm Location: 229 Hayes-Healy Bldg Title: The geography problem on 4-manifolds: 10/8 + 4 Poster Originally published at math.nd.edu.