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Deterministic Dynamics and Randomness in PDE PDE中的确定性动力学和随机性
Oberwolfach Reports Pub Date : 2023-04-13 DOI: 10.4171/owr/2022/26
A. Nahmod, G. Staffilani, H. Weber, Sijue Wu
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引用次数: 1
Conic Linear Optimization for Computer-Assisted Proofs 二次曲线线性优化的计算机辅助证明
Oberwolfach Reports Pub Date : 2023-04-13 DOI: 10.4171/owr/2022/20
Etienne de Klerk, D. Henrion, F. Vallentin, Angelika Wiegele
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引用次数: 0
Re-thinking High-dimensional Mathematical Statistics 重新思考高维数理统计
Oberwolfach Reports Pub Date : 2023-04-13 DOI: 10.4171/owr/2022/25
F. Bunea, R. Nowak, A. Tsybakov
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引用次数: 0
Universality: Random Matrices, Random Geometry and SPDEs 通用性:随机矩阵,随机几何和spde
Oberwolfach Reports Pub Date : 2023-04-13 DOI: 10.4171/owr/2022/27
Martin Hairer, G. Miermont, H. Yau
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引用次数: 0
Nonlinear Waves and Dispersive Equations 非线性波与色散方程
Oberwolfach Reports Pub Date : 2023-04-13 DOI: 10.4171/OWR/2004/50
C. Kenig, H. Koch, D. Tataru
{"title":"Nonlinear Waves and Dispersive Equations","authors":"C. Kenig, H. Koch, D. Tataru","doi":"10.4171/OWR/2004/50","DOIUrl":"https://doi.org/10.4171/OWR/2004/50","url":null,"abstract":"The aim of the workshop was to discuss current developments in nonlinear waves and dispersive equations from a PDE based view. The talks centered around rough initial data, long time and global existence, perturbations of special solutions, and applications. Mathematics Subject Classification (2000): 35xx. Introduction by the Organisers Nonlinear dispersive equations are models for nonlinear waves in a wide range of physical contexts. They display the competing or cooperating effects of linear dispersion and nonlinear interactions, which may be focussing or defocussing. They are linked to diverse areas of mathematics and physics, ranging from nonlinear optics over Fourier analysis to integrable systems. Despite a huge range of different dispersive equations there are a number of recurrent themes. Current research aims at a conceptual understanding of phenomena across different classes of equations, and a detailed understanding of features of classes of solutions. The following themes were covered. (1) Rough initial data Scaling often determines a critical Hilbert space of initial data. Wellposedness may or may not hold up to the critical space. During the last years an almost complete understanding of wave maps in 2 space dimensions and of critical nonlinear Schrodinger equations with power nonlinearities has been gained in Rn. With these insights the Schrodinger maps are intensively studied. The situation is different for the Kortewegde-Vries hierarchy and the Nonlinear Schrodinger equation, where specific 2394 Oberwolfach Report 41/2010 results throw some light upon the gap between scaling and wellposedness. A conceptual understanding of this gap seems to be out of reach. The insights gained in recent years allowed to attack global wellposedness in a number of surprising directions, including global wellposedness for a quintic nonlinear Schrodinger equation on a compact three dimensional manifold, global existence for supercritical ’stochastic’ initial data and global existence for several problems from physics. (2) Dynamics near solitons What happens to solitons in perturbated media? What can one say about solutions near solitons? The set of solitons appears to be surprising stable. Can one describe the interaction between modal parameters and a ’wave’ part of the solution? A particular important case is blow-up along the set of solitons. The study of this mechanism gave insights into blow-up dynamics. (3) Applications and relations to different fields There are prominent examples of dispersive integrable PDEs, including Korteweg-de-Vries, Nonlinear Schrodinger and Camassa-Holmes. They are asymptotic equations for example for waterwaves models. The Einstein equations in general relativity naturally lead to linear and nonlinear hyperbolic equations. There is considerable progress on the understanding of decay for linear wave equations in the Kerr geometrypotentially an important step towards stability of the Kerr family. There is a large number","PeriodicalId":436142,"journal":{"name":"Oberwolfach Reports","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132559583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hilbert Complexes: Analysis, Applications, and Discretizations 希尔伯特复合体:分析、应用和离散化
Oberwolfach Reports Pub Date : 2023-04-13 DOI: 10.4171/owr/2022/29
A. Alonso Rodríguez, D. Arnold, D. Pauly, F. Rapetti
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引用次数: 2
Arbeitsgemeinschaft: Geometric Representation Theory 几何表征理论
Oberwolfach Reports Pub Date : 2023-04-13 DOI: 10.4171/owr/2022/18
Daniel Juteau, Simon Riche, W. Soergel, Geordie Williamson
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引用次数: 0
Diophantische Approximationen Diophantische Approximationen
Oberwolfach Reports Pub Date : 2023-04-13 DOI: 10.4171/owr/2016/21
Y. Bugeaud, P. Corvaja, Laura Demarco, Philipp Habegger
{"title":"Diophantische Approximationen","authors":"Y. Bugeaud, P. Corvaja, Laura Demarco, Philipp Habegger","doi":"10.4171/owr/2016/21","DOIUrl":"https://doi.org/10.4171/owr/2016/21","url":null,"abstract":"","PeriodicalId":436142,"journal":{"name":"Oberwolfach Reports","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129522669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multiscale Coupled Models for Complex Media: From Analysis to Simulation in Geophysics and Medicine 复杂介质的多尺度耦合模型:从地球物理学和医学的分析到模拟
Oberwolfach Reports Pub Date : 2023-03-10 DOI: 10.4171/owr/2022/4
M. Peszynska, I. Pop, B. Wohlmuth, Z. Yosibash
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引用次数: 0
Mini-Workshop: Regularization by Noise: Theoretical Foundations, Numerical Methods and Applications 小型工作坊:噪声正则化:理论基础、数值方法及应用
Oberwolfach Reports Pub Date : 2023-03-10 DOI: 10.4171/owr/2022/9
O. Butkovsky, A. Djurdjevac, Máté Gerencsér
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引用次数: 0
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