LEAPS-MPS: Geometrization with Positive Curvature

LEAPS-MPS：具有正曲率的几何化

• 批准号: 2316659
• 负责人: Xiaolong Li
• 金额: $ 25万
• 依托单位: Wichita State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-08-15 至 2025-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2316659&HistoricalAwards=false
• 关键词: LEAPS; MPS; Geometrization; Positive; Curvature

A fundamental theme in geometry is to study the relationship between the curvature and the shape of the space. This project will investigate in dimensions four and higher how “positivity curvature” determines, partially or in full, the global shape of the underlying space, aiming to extend the famous Gauss-Bonnet Theorem in dimension two and Hamilton and Perelman’s work on geometrization in dimension three to higher dimensions. In this project, the PI will expand the study of geometrization to manifolds of dimensions four and higher, making use of tools such as curvature operators and Ricci flows. In addition, the PI will organize a variety of activities for middle and high school students in the local Wichita area and engage in mentoring programs for undergraduate and graduate students at Wichita State University aimed at broadening participation, especially amongst underrepresented minority students. The research objective of this project is to investigate the classification of four and higher-dimensional spaces, including compact Riemannian manifolds, Einstein manifolds, and shrinking gradient Ricci solitons, whose curvature satisfies a positivity condition, such as positive isotropic curvature, positive sectional curvature, positive Ricci curvature, and positive curvature operator of the second kind. The outcome is a better understanding of the relationship between curvature and topology. Primary strategies include analyzing solutions to the Ricci flow, applying the maximum principle to partial differential equations satisfied by geometric quantities, and understanding the relationship between various notions of positive curvature via tensor algebra and Lie algebra.This project is jointly funded by the Launching Early-Career Academic Pathways in the Mathematical and Physical Sciences (LEAPS) and the Established Program to Stimulate Competitive Research (EPSCoR).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.

几何学中的一个基本主题是研究空间的曲率和形状之间的关系。这个项目将在四维和更高的维度上研究“正曲率”如何部分或全部决定底层空间的整体形状，目的是将著名的二维高斯-波内特定理和哈密尔顿和佩雷尔曼在三维几何化方面的工作推广到更高的维度。在这个项目中，PI将利用曲率算子和Ricci流等工具，将几何化的研究扩展到四维和更高维的流形。此外，国际和平协会将为当地威奇托地区的初中生和高中生组织各种活动，并参与威奇托州立大学本科生和研究生的辅导方案，旨在扩大参与，特别是在代表性不足的少数族裔学生中。这个项目的研究目标是研究曲率满足正性条件的四维和高维空间的分类，包括紧致黎曼流形、爱因斯坦流形和收缩梯度Ricci孤子，如正的迷向曲率、正的截面曲率、正的Ricci曲率和第二类正曲率算子。其结果是更好地理解了曲率和拓扑之间的关系。主要策略包括分析Ricci流的解，将最大值原理应用于满足几何量的偏微分方程，以及通过张量代数和李代数了解正曲率的各种概念之间的关系。该项目由启动职业生涯早期学术路径数学和物理科学(LEAPS)和既定的刺激竞争研究计划(EPSCoR)共同资助。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。