搜索结果: 1-14 共查到“groups”相关记录14条 . 查询时间(0.218 秒)
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Rigidity results in mapping class groups and homeomorphism groups
映射类群 同胚群 刚性结果
2023/11/13
Mapping class groups and homeomorphism groups are symmetry groups of surfaces and all manifolds. They are usually very rigid, in the sense that their automorphism groups only consist of conjugation. I...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：On the lowest two-sided cells of affine Weyl groups
仿射Weyl群 最低双侧胞 Kazhdan-Lusztig基
2023/12/11
In this talk, I will present a proof a decomposition formula of Kazhdan-Lusztig basis for the elements in the lowest two-sided cell of an affine Weyl group. This formula can be used to determine the l...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Morse boundaries of Groups
群 Morse边界 群论
2023/5/17
The Morse boundary of a proper geodesic metric space is a generalization of the Gromov boundary of a hyperbolic space. It is a quasi-isometry invariant to study "hyperbolic directions" in the space. T...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Affine Springer fibers for p-adic groups
p-adic基团 仿射 弹簧纤维
2023/4/13
Affine Springer fibers were introduced by Kazhdan-Lusztig as a generalization of Springer fibers to loop groups. Later they were found to have applications in harmonic analysis in reductive groups ove...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Ergodic Theory and Semisimple Groups
遍历理论 半简单群 马古利斯超刚性定理
2023/4/13
We go through Zimmer's book Chapter 2-3, making some preparations for Margulis super-rigidity theorem.
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Unstable homotopy groups of indecomposable A_3^2-complexes
不可分解 A_3^2 配合物 不稳定 同伦群
2023/4/14
In this talk, I will introduce the methods for calculating the unstable homotopy groups of finite CW-complexes which builds on works of the relative James construction initiated by B. Gray in 1973 and...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Fourier analysis on finite abelian groups and the uncertainty principles
有限阿贝尔群 傅里叶分析 不确定性原理
2023/4/18
Let G be a finite abelian group. If f: G → C is a nonzero function with Fourier transform f , the Donoho-Stark uncertainty principle states that|supp(f)||supp(f )|≥|G|. The purpose of this talk is two...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Tools of o-minimality in the study of groups
群体研究 o-最小性工具 稳定理论
2023/4/27
O-minimal structures have been introduced in the 80s to some extent with the goal of finding generalizations of model theoretic properties of stable theories to ordered structures. Later on, numerous ...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：First-Order Aspects of Coxeter Groups
考克斯特群 一阶方面 非阿贝尔自由群
2023/5/5
Since the work of Sela, and Kharlampovich & Myasnikov on Tarski’s problem for non-abelian free groups, the model theoretic analysis of classes of groups arising from combinatorial and geometric group ...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：On open subgroups of p-adic algebraic groups
p-adic 代数群 开子群
2023/5/5
In this talk, I will breifly introduce the p-aidc number, p-aidc manifolds, p-adic algebraic groups and p-aidc definable groups. Using an elementary method, I will show that every open subgroup of a c...
Mental Health Groups Write Joint Amicus re: Panetti v. Quarterman
Mental Health Psychiatric
2007/4/23
April 17, 2007，WASHINGTON—The American Psychological Association has teamed with the National Alliance on Mental Illness and the American Psychiatric Association to present a brief as Amici Curiae to ...
Genes and groups of genes commonly shared between species, studies show
Genes primitive organisms
2007/3/12
8-Mar-2007，Berkeley -- Two new studies by University of California, Berkeley, scientists highlight the amazing promiscuity of genes, which appear to shuttle frequently between organisms, especially mo...
Asian Development Bank Strengthening Traditional Water User Groups in Aceh
irrigation systems
2007/3/9
13 February 2007，ADB IS working closely with local communities to strengthen traditional water groups and rehabilitate irrigations systems in Aceh and Nias.
Utilities, efficiency and environmental groups join to propose new efficiency standard for electric transformers
electric utilities environmental energy
2007/3/8
WASHINGTON, D.C. (February 20, 2007) – The nation’s investor- and municipally
owned electric utilities, in another indication of energy efficiency’s growing value to
America’s economy, today joined ...