2 papers
math.AG2017
Gaiotto's Lagrangian subvarieties via loop groups
Yu Li
The purpose of this note is to give a simple proof of the fact that a certain substack, defined in [2], of the moduli stack of Higgs bundles over a curve , fo…
math.DG2017
The Rigidity of Ricci shrinkers of dimension four
Yu Li, Bing Wang
In dimension , we show that a nontrivial flat cone cannot be approximated by smooth Ricci shrinkers with bounded scalar curvature and Harnack inequality, under the pointed-Gromo…