Stochastic Processes on Rough Spaces and Geometric Properties of Random Sets

粗糙空间上的随机过程和随机集的几何性质

• 批准号: 1951577
• 负责人: Patricia Alonso Ruiz
• 金额: $ 15.14万
• 依托单位: Texas A&M University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-08-16 至 2023-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1951577&HistoricalAwards=false
• 关键词: Stochastic; Processes; Rough; Spaces; Geometric

How does information spread within a system over time? How is this related to the intrinsic structure of the system? Mathematical models are developed to understand and make predictions about the behavior of highly complex processes and structures. Richer and more realistic models can be obtained by increasing their 'roughness'; here we may think of the intricate branching of large networks like the Internet. In addition, incorporating randomness can help to better describe the interactions between the elements that compose the model, for instance between different web servers. The area of mathematics concerned with the analysis of random processes and structures is called probability theory. This project aims to apply probability theory to better understand the interconnections between the random processes, the geometry, and the analysis of rough spaces and random geometric models. The research supported by this award aims to investigate stochastic processes in rough spaces and functionals of random sets. The PI will analyze the behavior of diffusion processes intrinsic to fractal-like spaces, where classical concepts such as derivatives or canonical measures are less straightforward or not even available. Special attention will be paid to the study of functional inequalities and gradient estimates to gain further insight into the connections between the process and the geometry of the underlying space. Besides, the PI will analyze properties of large spatial data sets modeled by point processes with long range dependencies. Here, the focus lies on geometric and potential-theoretic aspects of random covering sets and the asymptotic behavior of statistics employed in the detection of rare events. The PI expects that the methods and techniques developed will lead to progress on current questions in mathematical physics, material and data sciences.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.

信息是如何随着时间的推移在系统中传播的？这与系统的内在结构有何关系？开发数学模型是为了理解和预测高度复杂的过程和结构的行为。通过增加模型的“粗糙度”，可以获得更丰富、更真实的模型;在这里，我们可以想到像互联网这样的大型网络的复杂分支。此外，引入随机性可以帮助更好地描述组成模型的元素之间的交互，例如不同Web服务器之间的交互。与随机过程和结构的分析有关的数学领域称为概率论。这个项目的目的是应用概率论，以更好地理解随机过程之间的相互联系，几何，粗糙空间和随机几何模型的分析。 该奖项支持的研究旨在研究粗糙空间中的随机过程和随机集的泛函。PI将分析分形空间固有的扩散过程的行为，其中经典概念，如导数或正则测度不那么直接或甚至不可用。特别注意将支付给功能的不平等和梯度估计的研究，以获得进一步深入了解的过程和基础空间的几何之间的连接。此外，PI将分析由具有长程依赖性的点过程建模的大型空间数据集的属性。在这里，重点在于几何和潜在的理论方面的随机覆盖集和渐近行为的统计检测罕见的事件。PI期望所开发的方法和技术将导致数学物理，材料和数据科学当前问题的进展。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

Oscillations of BV measures on unbounded nested fractals

无界嵌套分形上 BV 度量的振荡

• DOI: 10.4171/jfg/122
• 发表时间: 2022
• 期刊: Journal of Fractal Geometry
• 影响因子: 0.8
• 作者: Alonso Ruiz, Patricia;Baudoin, Fabrice
• 通讯作者: Baudoin, Fabrice

Minimal Gap in the Spectrum of the Sierpiński Gasket

SierpiÅski 垫片系列中的最小间隙

• DOI: 10.1093/imrn/rnab243
• 发表时间: 2021
• 期刊: International Mathematics Research Notices
• 影响因子: 1
• 作者: Alonso Ruiz, Patricia

Heat kernel analysis on diamond fractals

• DOI: 10.1016/j.spa.2020.08.009
• 发表时间: 2019-06
• 期刊: Stochastic Processes and their Applications
• 影响因子: 1.4
• 作者: Patricia Alonso Ruiz

Besov class via heat semigroup on Dirichlet spaces I: Sobolev type inequalities

• DOI: 10.1016/j.jfa.2020.108459
• 发表时间: 2018-11
• 期刊: Journal of Functional Analysis
• 影响因子: 1.7
• 作者: Patricia Alonso Ruiz;Fabrice Baudoin;Li Chen;Luke G. Rogers;N. Shanmugalingam;A. Teplyaev