搜索结果: 16-26 共查到“知识库 纤维丛论”相关记录26条 . 查询时间(3.515 秒)
Motivic Milnor fibers over complete intersection varieties and their virtual Betti numbers
Motivic Milnor fibers complete intersection varieties their virtual Betti numbers
2010/11/26
We study the Jordan normal forms of the local and global monodromies over complete intersection subvarieties of Cn by using the theory of motivic Milnor fibers.The results will be explicitly described...
Uniformly rigid spaces
Uniformly rigid spaces
2010/11/30
We define a new category of non-archimedean analytic spaces over a complete discretely valued field, which we call uniformly rigid.It extends the category of rigid spaces.
Derivations, generic formal fibers and bad Noetherian rings
Derivations generic formal fibers bad Noetherian rings
2010/12/9
We consider a circle of ideas involving differential algebra, local Noetherian rings, and their generic formal fibers. Connecting these ideas gives rise to what we term a “twisted” subring R of a ring...
Lipschitz minimality of Hopf fibrations and Hopf vector fields
Lipschitz minimality Hopf fibrations Hopf vector fields
2010/12/14
Given a Hopf bration of a round sphere by parallel great subspheres, we prove that the projection map to the base space is, up to isometries of domain and range,the unique Lipschitz constant minimize...
Hopf fibration: geodesics and distances
Sub-Riemannian geometry Hopf fibration, geodesic Carnot-Carath´ eodory dis-tance
2010/12/13
Here we study geodesics connecting two given points on odd-dimensional spheres respecting the Hopf fibration. This geodesic boundary value problem is completely solved in the case of 3-dimensional sph...
Powers of ideals and the cohomology of stalks and fibers of morphisms
Castelnuovo-Mumford regularity powers of ideals Rees algebras
2010/12/1
We first provide here a very short proof of a refinement of a the-orem of Kodiyalam and Cutkosky, Herzog and Trung on the regularity of powers of ideals.
Classifying spaces and fibrations of simplicial sheaves
classifying spaces fibre sequence simplicial sheaves
2010/12/7
In this paper, we discuss the construction of classifying spaces of fibre sequences in model categories of simplicial sheaves. One construction proceeds via Brown representability and provides a class...
Calculi, Hodge operators and Laplacians on a quantum Hopf fibration
Calculi Hodge operators Laplacians quantum Hopf fibration
2010/12/9
We describe Laplacian operators on the quantum group SUq(2) equipped with the four dimensional bicovariant differential calculus of Woronowicz as well as on the quantum homogeneous space S2
q with th...
纤维悬浮剪切湍流中纤维旋转扩散系数的理论研究
纤维悬浮流 剪切湍流 旋转扩散系数 表达式
2008/2/11
卷期页码：第28卷 第3期
(2007年3月) P.263
文章编号：1000-0887(2007)03-0263-07
纤维悬浮剪切湍流中纤维旋转扩散系数的理论研究
高振宇1，林建忠1,2，李俊1
1. 浙江大学 力学系，流体传动及控制国家重点实验室，杭州 310027；2. 中国计量学院，杭州 310018
摘要：对纤维悬浮剪切湍流中纤维旋转扩散系数进行了理论研究．首先建立了流场...
卷期页码：第26卷 第3期
(2005年3月) P.281
文章编号：1000-0887(2005)03-0281-06
张量封闭模型与三维取向分布对纤维悬浮槽流稳定性的影响
游振江，林建忠
浙江大学 力学系，流体传动及控制国家重点实验室， 杭州 310027
摘要：应用3种不同的纤维方向张量封闭模型，数值模拟了纤维悬浮槽流的流动稳定性问题，从而研究封闭模型和纤维的三维取向分布对稳...
一类具有纤维化的一般型极小曲面的斜率
2007/12/13
设S是一般型极小的代数曲面,f是纤维化,则有自然的正合列$\pi_1(F)\mapsto \pi_1(S)\mpasto\pi \mpasto 1$.在本文中我们证明,如果f为非局部平凡,且S具有一个2阶挠元,那么λ(f)≥4-1/(g-1),这里g是f的纤维F的亏格.