学术报告
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21
2016-03
A spectral flow formula through Brouwer degree for semi-Riemannian geodesics题目：A spectral flow formula through Brouwer degree for semi-Riemannian geodesics 报告人： Alessandro Portaluri 教授 （意大利都灵大学） 摘要: Perturbed geodesics are trajectories of particles moving on a semi-Riemannian manifold in the presence of a potential. O...
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17
2016-03
Stability of Contact Lines in Fluids题目：Stability of Contact Lines in Fluids 报告人：郭岩教授（布朗大学） 摘要: Contact lines (e.g. the wine edge at the wall of a glass) appear in many fluid problems. Yet there has been rather few PDE study of such problem due to corner singularity of boundary....
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17
2016-03
Uniform estimates of incompressible viscous surface waves题目：Uniform estimates of incompressible viscous surface waves 报告人：王焰金(厦门大学) 摘要：We consider the dynamics of a layer of viscous incompressible fluid lying above a rigid bottom and below the atmosphere. It is proved that there is a uniform time ...
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10
2016-03
Polynomial and rational convexity -- basic geometric properties and applications题目：Polynomial and rational convexity-- basic geometric properties and applications 报告人：Prof. Nikolay Shcherbina (University of Wuppertal, Germany) 摘要: In the first lecture we first define and then discuss different characterizations of poly...
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25
2016-01
A model structure approach to the Tate–Vogel cohomology题目： A model structure approach to the Tate–Vogel cohomology 报告人：胡江胜 教授 (江苏理工学院) 摘要：We study Tate–Vogel cohomology of complexes by applying the model structure induced by a complete hereditary cotorsion pair (A, B) of modules. Vanishing o...
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23
2016-01
关于二次型的复合问题题 目：关于二次型的复合问题 报告人：黄华林教授 (山东大学) 摘要：在本次报告中，我们首先介绍二次型的复合问题，特别是著名的Hurwitz问题：确定所有的三元正整数组[r,s,n]，使得有以下恒等式 (x_1^2+...+x_r^2)(y_1^2+...+y_s^2)=z_1^2+...+z_n^2, 其中x=(x_1, ..., x_r)和y=(y_1, ..., y_s)均为未知数组，而z_i均为x和y的双线性函数。然后我们介绍近年来发展的量子线性...
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21
2016-01
A closed model structure of Iyama-Yoshino subfactor triangulated categories题 目：A closed model structure of Iyama-Yoshino subfactor triangulated categories 报告人： 李志伟 博士 (江苏师范大学) 摘要：We introduce the notion of one-sided triangulated seeds, which arises from complete cotorsion pairs in exact categories and from to...
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20
2016-01
Powers of phantom ideals题目： Powers of phantom ideals 报告人： 扶先辉教授 (东北师范大学) 摘要：In this talk, we introduce Mono-epi exact structure on the morphisms of an exact category. This exact structure is used to prove new versions of Salce's Lemma, Christensen's Lemma and ...
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20
2016-01
Constructing recollements of singularity categories题 目：Constructing recollements of singularity categories 报告人：周国栋教授 (华东师范大学) 摘要：Given a recollement of derived categories of dg categories, under mild conditions, we can construct a recollement of singularity categories, which restricts to a short...
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19
2016-01
Gorenstein modules and Gorenstein dimensions along ring homomorphisms题 目：Gorenstein modules and Gorenstein dimensions along ring homomorphisms 报告人： 吴德军 博士 (兰州理工大学) 摘要：In this talk, we give some new characterizations of Gorenstein projective, injective and flat modules over commutative noetherian local r...