講座編號(hào)：jz-yjsb-2020-y013

講座題目：Solutions of the Minimal Surface Equation and of the Monge-Ampere Equation near Infinity

主 講 人：韓  青   美國(guó)圣母大學(xué)

講座時(shí)間：2020年09月25日（星期五）上午09:30

講座地點(diǎn)：線上平臺(tái)：騰訊會(huì)議，會(huì)議ID: 707 245 660

參加對(duì)象：數(shù)學(xué)與統(tǒng)計(jì)學(xué)院全體師生

主辦單位：研究生院

承辦單位：數(shù)學(xué)與統(tǒng)計(jì)學(xué)院

主講人簡(jiǎn)介：

韓青，美國(guó)圣母大學(xué)數(shù)學(xué)系教授。美國(guó)紐約大學(xué)庫(kù)朗數(shù)學(xué)研究所博士，美國(guó)芝加哥大學(xué)博士后，曾在德國(guó)萊比錫馬普所和美國(guó)紐約大學(xué)庫(kù)朗數(shù)學(xué)研究所進(jìn)行科研。獲美國(guó)Sloan Research Fellowship. 韓青教授長(zhǎng)期致力于非線性偏微分方程和幾何分析的研究工作，在等距嵌入、Monge-Ampere方程、調(diào)和函數(shù)的零點(diǎn)集和奇異集、退化方程等方面做出了一系列原創(chuàng)性的重要研究成果。

主講內(nèi)容：

Classical results assert that, under appropriate assumptions, solutions near infinity are asymptotic to linear functions for the minimal surface equation and to quadratic polynomials for the Monge-Ampere equation for dimension n at least 3, with an extra logarithmic term for n=2. We characterize remainders in the asymptotic expansions the difference between solutions and linear functions and the difference between solutions and quadratic polynomials for the Monge-Ampere equation by a single function, which is given by a solution of some elliptic equation near the origin via the Kelvin transform. Such a function is smooth in the entire neighborhood of the origin for the minimal surface equation in every dimension and for the Monge-Ampere equation in even dimension, but only C^{n-1,/alpha} for the Monge-Ampere equation in odd dimension, for any /alpha in (0,1).