I obtained a degree of Doctor of Natural Science from University of Science and Technology of China (USTC) in June 2019, and a degree of Doctor of Philosophy from University of Jyvaskyla (JYU) in Finland three months later. Both degrees specilize pure mathematics. My advisors in USTC are Prof. Ping Li and Prof. Congwen Liu.  My Finnish supervisor is Prof. Pekka Koskela. I have worked in JYU as a postdoctor for one year. I am taking the second postdoctor in Shandong University (Qingdao). 

My current research interest is about homeomorphic extensions problems in geometric function theory (GFT). To be precise, I care about the Sobolev regualrity of Schoenflies-type extensions. In my publication you will find details on this topic. Besides extension problems, other topics in GFT, like regularity problems and parameterization problems, are also my interest. Furthermore I am learning harmonic analysis and geometric measure theory. Specially I am fascinated by their interactions. You are warmly welcome to talk with me the above or other analysis.  

通讯/办公地址 : 山东省青岛市即墨滨海路72号山东大学（青岛）华岗苑东楼

邮箱 : haiqing.xu@email.sdu.edu.cn