Differential Equations in Complex Riemannian Geometry

复杂黎曼几何中的微分方程

• 批准号: 2203607
• 负责人: Jian Song
• 金额: $ 18.55万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-07-01 至 2025-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2203607&HistoricalAwards=false
• 关键词: Differential; Equations; Complex; Riemannian; Geometry

The research project focuses on several open questions in complex geometry and geometric flows in relation to geometry and physics. The deep understanding of these problems will help make fundamental progress in the study of analytic and geometric singularities arising from differential equations in geometry and physics. The project also aims to bring in research and teaching innovation in mathematics from various disciplines and has an immediate beneficial effect on undergraduate and graduate students at Rutgers as well as in the regional mathematical community. The PI will continue to organize and participate in the integrated research/education programs and activities that will promote the education level of the nation. The PI will investigate canonical metrics of Einstein type on Kahler varieties with mild singularities. In particular, the PI will study the Riemannian geometric properties of such singular metrics and analytic moduli problems for Kahler-Einstein manifolds. The PI will continue to make progress in the analytic minimal model program with Ricci flow by studying both finite-time and long-time formation of singularities of the Kahler-Ricci flow on Kahler varieties. Such singularity formation should be understood through global and local metric uniformization equivalent to canonical geometric surgeries and birational transformations. The PI also aims to extend his work on the Nakai-Moishezon criterion for complex Hessian equations in both stable and unstable cases, building connections between conditions of algebraic positivity and nonlinear PDEs. The PI will employ theories and techniques from geometric L2-theory, nonlinear PDEs, Cheeger-Colding theory and Perelman's work on Ricci flow. The outcome of the research will develop new tools and give profound insights and understanding of topological, geometric and algebraic structures of complex spaces.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该研究项目侧重于与几何和物理学相关的复杂几何和几何流中的几个开放性问题。对这些问题的深入理解将有助于几何和物理学中微分方程产生的分析和几何奇异性的研究取得根本性进展。该项目还旨在从各个学科引入数学研究和教学创新，并对罗格斯大学的本科生和研究生以及区域数学界产生直接的有益影响。PI将继续组织和参与将提高国家教育水平的综合研究/教育方案和活动。 PI将研究具有轻度奇点的Kahler簇上的爱因斯坦型正则度量。特别是，PI将研究这种奇异度量的黎曼几何性质和Kahler-Einstein流形的解析模问题。PI将继续在Ricci流的分析最小模型程序中取得进展，研究Kahler变量上Kahler-Ricci流奇点的有限时间和长时间形成。这种奇异性的形成应理解通过全球和当地的度量均匀化相当于典型的几何手术和双有理变换。PI还旨在扩展他在稳定和不稳定情况下复杂Hessian方程的Nakai-Moishezon准则方面的工作，建立代数正性条件和非线性偏微分方程之间的联系。PI将采用几何L2理论、非线性偏微分方程、Cheeger-Colding理论和Perelman关于Ricci流的工作的理论和技术。该研究成果将开发新的工具，并对复杂空间的拓扑、几何和代数结构给予深刻的见解和理解。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Kähler–Einstein metrics near an isolated log-canonical singularity

• DOI: 10.1515/crelle-2022-0095
• 发表时间: 2021-06
• 期刊: Journal für die reine und angewandte Mathematik (Crelles Journal)
• 作者: V. Datar;X. Fu;Jian Song

Local noncollapsing for complex Monge–Ampère equations

复杂 Monge-Ampère 方程的局部不塌缩

• DOI: 10.1515/crelle-2022-0069
• 发表时间: 2022
• 期刊: Journal für die reine und angewandte Mathematik (Crelles Journal)
• 作者: B. Guo;Jian Song
• 通讯作者: Jian Song

Diameter estimates for long-time solutions of the Kähler–Ricci flow

• DOI: 10.1007/s00039-022-00620-9
• 发表时间: 2022-10
• 期刊: Geometric and Functional Analysis
• 影响因子: 2.2
• 作者: Wangjian Jian;Jian Song