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【Colloquium】Hessian estimate for the sigma-2 equation in dimension four
报告人：袁域（美国华盛顿大学）时 间：2023年7月19日10:40地 点：厦门大学海韵园实验楼105报告厅内容摘要:We present joint work with Ravi Shankar on Hessian estimate and interior regularity for the sigma-2 equation in four dimensions. Our method also provides respectively a Hessian estimate for smooth solutions satisfying a dynamic semi-convexity condition in higher dimensions, and a new proof for ...
报告人：袁域（美国华盛顿大学）
时间：2023-07-19 10:40:00
地点：厦门大学海韵园实验楼105报告厅
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【名家讲堂】Collapsed manifolds with Ricci local bounded covering geometry
报告人：戎小春（美国罗格斯大学）时 间：2023年7月19日9:30地 点：厦门大学海韵园实验楼105报告厅内容摘要:A complete Riemannian n-manifold M is called epsilon-collapsed, if every unit ball in M has volume less than epsilon (while often a bound on `curvature' must be imposed to prevent a rescaling of metric). In 1978, Gromov classified `almost flat manifolds' (or the `maximally collapsed manifolds'...
报告人：戎小春（美国罗格斯大学）
时间：2023-07-19 09:30:00
地点：厦门大学海韵园实验楼105报告厅
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【学术报告】Speed of explosion for continuous-state nonlinear branching processes with large jumps
报告人：周晓文（康考迪亚大学）时 间：2023年7月18日10:30地 点：厦门大学海韵园实验楼105报告厅内容摘要:Continuous-state branching processes (CSBPs) with nonlinear branching mechanism can be obtained from spectrally positive Lvy processes by generalized Lamperti time changes. These generalized CSBPs allow rich asymptotic behaviours such as extinction, explosion and coming down from infinity. The ...
报告人：周晓文（康考迪亚大学）
时间：2023-07-18 10:30:00
地点：厦门大学海韵园实验楼105报告厅
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【学术报告】Generalizations of Atiyah-Singer Index Theorem
报告人：刘博（华东师范大学）时 间：2023年7月12日14:30地 点：厦门大学海韵园实验楼106报告厅内容摘要:In this talk, we will discuss various generalizations of the Atiyah-Singer index theorem and introduce a comparison formula for equivariant eta forms. This is a joint work with Xiaonan Ma. 个人简介：刘博，华东师范大学教授、博士生导师，国家杰出青年科学基金项目获得者。研究方向为流形上的整体分析，A...
报告人：刘博（华东师范大学）
时间：2023-07-12 14:30:00
地点：厦门大学海韵园实验楼106报告厅
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【学术报告】Witten deformation for non-Morse functions and gluing formulas
报告人：颜俊榕（北京国际数学研究中心）时 间：2023年7月12日15:30地 点：厦门大学海韵园实验楼106报告厅内容摘要:Witten deformation is a versatile tool with numerous applications in mathematical physics and geometry. In this talk, we will focus on the analysis of Witten deformation for a family of non-Morse functions, leading to a new proof of the gluing formula for analytic torsions. Then we coul...
报告人：颜俊榕（北京国际数学研究中心）
时间：2023-07-12 15:30:00
地点：厦门大学海韵园实验楼106报告厅
