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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Quasimorphisms and Bavard's duality
拟同构 巴瓦尔 对偶性
2023/4/18
Quasimorphisms are generalizations of homomorphisms to the real number. Groups with nice aciton on Gromov-hyperbolic spaces often have a large space of quasimorphisms, although such groups can have tr...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Products of random matrices
随机矩阵 乘积 极限定理收敛率
2023/4/19
Let $(g_n)_{n\geq 1}$ be a sequence of independent and identically distributed random matrices of type $d \times d $ with real coefficients. Consider the products $G_n : = g_n \ldots g_1$ and the rand...
北京大学数学科学学院教师悼念周修义教授
周修义 北大 数学学院
2023/6/16
北京大学客座教授、国际著名数学家、佐治亚理工学院周修义教授于当地时间2023年2月18日在美国亚特兰大逝世。北京大学北京大学数学科学学院张恭庆院士、文兰院士、李承治教授、王铎教授等多位离退休教师表示沉痛悼念。
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Derived Grassmannians, derived Schur functors, and their applications
派生 格拉斯曼量 舒尔函子 应用
2023/4/21
In this talk, we will revisit Grothendieck's theory of Grassmannians and flag schemes and the theory of Schur and Weyl module functors studied in $GL_n$-representation theory from theperspective of de...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Linear Convergence of a Primal-dual Algorithm for Multi-agent Interval Optimization
多智能体 区间优化 原对偶算法 线性收敛
2023/4/21
In this talk, we consider a distributed interval optimization problem (DIOP) with uncertainties, whose global function is formed by local convex interval functions. In seeking Pareto solutions for dis...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：The Lp-Brunn-Minkowski conjecture for 0
0
2023/4/21
The Lp-Brunn-Minkowski conjecture for 0 < p < 1 states that the volume functional is concave when origin-symmetric convex bodies are Lp-added, where 0 < p < 1. This conjecture has garnered significant...
刘慧芳，女，汉族，1981年3月出生，新乡获嘉人，群众，副教授。
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：A Landscape View of Eigenvalues Approximation
特征值近似 景观视图 无序系统
2023/4/24
Waves of all sorts, including electromagnetic waves, acoustic waves, and mechanical vibrations, play a role in shaping our world. In disordered systems, the transport of waves is hindered, resulting i...
极化码的所有保持串行抵消译码不变的仿射自同构（马志明、闫桂英）
极化码 保持串行抵消 译码不变 仿射自同构
2023/2/22
Automorphism ensemble (AE) decoding for polar codes was proposed by decoding permuted codewords with successive cancellation (SC) decoders in parallel and hence has lower latency compared to that of s...
图谱方法改进GV界（马志明、闫桂英）
图谱方法 改进 GV界
2023/2/22
This paper improves Gilbert-Varshamov bound by graph spectral method. Gilbert graph Gq,n,d is a graph with all vectors in Fnq as vertices where two vertices are adjacent if their Hamming distance is l...
成都信息工程大学软件工程学院硕士生导师唐聃教授（图）
成都信息工程大学软件工程学院 硕士生导师 教授 编码理论 智能服务
2023/12/11
唐聃，男，教授，中共党员, 研究生学历，博士学位。现任四川省信息化应用支撑软件工程技术研究中心主任、航空制造及地面指挥软件四川省高校重点实验室主任，中国科学院西部之光人才计划入选者（中国科学院西部青年学者A类）。
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：The N-periodic wave solutions of some coupled bilinear equations
耦合 双线性方程 N周期波解
2023/4/26
In this talk, we present an efficient numerical scheme to calculate the N-periodic wave solutions to the Tzitzeica equation, the (2+1)-dimensional modified Bogoyavlenskii-Schiff equation and the mKdV-...
影响域近似对非局部模型局部极限的影响
影响域近似 非局部模型 极限
2023/1/4
Many nonlocal models have adopted Euclidean balls as the nonlocal interaction neighborhoods. When solving them numerically, it is sometimes convenient to adopt polygonal approximations of such balls. ...
一类求解非光滑矩阵流形优化的基于增广拉格朗日的半光滑牛顿法
非光滑矩阵 流形优化 增广拉格朗日 半光滑牛顿法
2023/1/5
This paper is devoted to studying an augmented Lagrangian method for solving a class of manifold optimization problems, which have nonsmooth objective functions and nonlinear constraints. Under the co...
影响域近似对非局部模型局部极限的影响（谢和虎）
域 非局部模型 局部极限
2023/2/22
Many nonlocal models have adopted Euclidean balls as the nonlocal interaction neighborhoods. When solving them numerically, it is sometimes convenient to adopt polygonal approximations of such balls. ...