搜索结果: 31-45 共查到“几何学”相关记录2072条 . 查询时间(0.412 秒)
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Exponential mixing of frame flows for geometrically finite hyperbolic manifolds with cusps
几何有限 双曲流形带尖 框架流 指数混合
2023/4/28
I will present the joint work with Jialun Li and Pratyush Sarkar in the talk. As a final work to establish that the frame flows for geometrically finite hyperbolic manifolds of arbitrary dimensions ar...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：μ-basis for a tensor product rational surface with respect to one variable
张量积 有理曲面 变量 μ基
2023/4/28
The method of moving planes and moving quadrics expresses the implicit equation of a rational parametric surface as a compact determinant. Efficient computation of the moving planes and moving quadric...
几何表示论本世纪以来显得十分活跃，引起了越来越多的关注。本报告试图从这个方向的一些源头工作理解几何表示论的内涵。这些工作包括P. Deligne和G. Lusztig关于有限李型群的表示的工作，T.A. Springer关于Weyl群的表示的工作，D. Kazhdan和G.Lusztig关于Coxeter群与Hecke代数表示的工作等。
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars： The category BC in terms of the Fargues–Fontaine curve
法格-枫丹曲线 BC类别 [LB18， §5-7]
2023/5/6
Cover [LB18, §5-7]. Explain the key results and ideas clearly.
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Geometric Singular Perturbation Theory and Traveling Pulses with Monotone Tails in a Diffusive Rosenzweig MacArthur Model
扩散 罗森茨威格麦克阿瑟模型 几何奇异摄动理论 单调尾巴行进脉冲
2023/5/5
In this talk, we first briefly review history of the geometric singular perturbation theory, then talk about the traveling pulses for a diffusive Rosenzweig MacArthur model. We show the existence of t...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Critical Allard regularity in dimension two and its application
二维中临界 阿拉德规律性 欧几里得空间
2023/5/5
The classical Allard regularity says, a rectifiable varifold in the unit ball of the Euclidean space passing through the original point with volume density close to 1 and generalized mean curvature sm...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Mixed-norm of orthogonal projections and analytic interpolation on dimensions of measures
正交投影 混合范数 度量维度 分析插值
2023/5/5
We obtain new mixed-norm estimates and geometric results on projections. In the proof we introduce a new quantity called s-amplitude, and interpolate analytically not only on p,q, but also on dimensio...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Shape-on-Scalar Regression Models: Going Beyond Prealigned Non-Euclidean Responses
标量 形状回归模型 超越预先对齐 非欧几里得
2023/5/5
The problem of using covariates to predict shapes of objects in a regression setting is important in many fields. A formal statistical approach, termed geodesic regression model, is commonly used for ...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Some special cases of the three dimensional Kakeya conjecture and their application to the restriction conjecture
三维Kakeya猜想 特殊情况 限制猜想
2023/5/9
We will discuss two special cases of the three-dimensional Kakeya conjecture: SL_2 Kakeya and a refined Wolff's hairbrush result. As an application of the refined Wolff's hairbrush result, we will dis...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：On polynomial method and its application（III）
多项式方法 多项式划分 关联几何
2023/5/10
We will introduce the polynomial partitioning method which has wide applications in incidence geometry, geometric measure theory, and harmonic analysis. In the first course, we will present some basic...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：复杂曲面五轴数控加工刀具姿态光顺的研究进展
复杂曲面 五轴数控 加工刀具姿态光顺
2023/5/15
五轴数控加工刀具姿态的确定不仅要从几何学层面考虑零件表面加工精度、避免刀具局部干涉和全局碰撞，其规划也受到相邻刀触点甚至整条刀具轨迹上刀具姿态变化的限制，必须考虑刀具姿态变化的光顺性以及刀具姿态变化与机床运动学性能及加工过程动态切削特性之间的关系。目前，刀具姿态优化的研究正逐渐从保证刀具运动几何可行的干涉碰撞消除、机床驱动轴的运动平稳光顺，向加工过程几何与运动学约束下的切削特性改善方向发展。五轴加...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Some geometry of affine Deligne-Lusztig varieties
仿射 Deligne-Lusztig变种 几何
2023/5/17
The mod p points of a Shimura variety have a conjectural description called the Langlands-Rapoport conjecture. In accordance with the conjecture, Rapoport defined (generalized) affine Deligne-Lusztig ...
低秩正交张量逼近的交替极分解方法的线性收敛性（叶科）
低秩 正交张量逼近 交替极分解方法 线性收敛性
2023/2/22
Low rank orthogonal tensor approximation (LROTA) is an important problem in tensor computations and their applications. A classical and widely used algorithm is the alternating polar decomposition met...
中国科学院数学物理学部莫毅明院士（图）
中国科学院数学物理学部 多复变函数论 复微分几何 代数几何 莫毅明 院士
2022/9/8
数学家，长期致力于多复变函数论、复微分几何与代数几何研究。1956年5月生于香港。1978年于美国耶鲁大学获硕士学位。1980年于美国斯坦福大学获博士学位。2015年当选为中国科学院院士。
中国科学院数学物理学部李安民院士（图）
中国科学院数学物理学部 微分几何 李安民 院士
2022/9/8
数学家，长期从事辛拓扑、整体微分几何研究。1946年9月生于重庆市。1969年毕业于北京大学数学力学系，1981年获该校硕士学位，1991年于德国柏林技术大学获博士学位。2009年当选中国科学院院士。