搜索结果: 1-15 共查到“数学 circle”相关记录29条 . 查询时间(0.078 秒)
Turning a circle into a square is possible with this kirigami-inspired formula（图）
kirigami 圆形 正方形 几何
2023/6/5
Kirigami takes pop-up books to a whole new level. The Japanese paper craft involves cutting patterns in paper to transform a two-dimensional sheet into an intricate, three-dimensional structure when p...
Exact D-optimal designs for response surface models on a circle
Exact D-optimal designs for response surface models on a circle
2015/3/20
Exact D-optimal designs for response surface models on a circle.
Circle Packing相关研究取得进展
圆相切 欧氏圆 二维拟共形映射 Teichmuller 空间理论
2021/9/15
二十多年前，W. Thurston（菲尔兹奖得主），D. Sullivan（Wolf奖得主）等著名数学家引进了Circle Packing理论，它是复分析中复解析函数的一种离散表示，从而可以由计算机具体实现一个具体的解析函数，现在Circle Packing理论是复分析研究中一种非常重要的工具，在复解析动力系统、Kleinian群、双曲几何、计算机图形学等数学分支的研究中扮演着十分重要的角色。这些...
GLOBAL 3D-GRIDS BASED ON GREAT CIRCLE ARC QTM SPHERE OCTREE AND ITS APPLICATION
Discrete Global Grids (DGGs) Earth System Spatial Grid（ESSG） Quaternary Triangula Mesh (QTM) Global GIS Spatial Data Mode Digital Earth
2014/4/21
With the development of computers, network communications, scientific computing, mapping remote sensing and geographic
information technologies, Discrete Global Grids (DGGs) and Earth System Spatial...
Fejer-Riesz factorizations and the structure of bivariate polynomials orthogonal on the bi-circle
Fejer-Riesz factorizations the structure of bivariate polynomials orthogonal the bi-circle Complex Variables
2012/6/29
We give a complete characterization of the positive trigonometric polynomials Q(\theta,\phi) on the bi-circle, which can be factored as Q(\theta,\phi)=|p(e^{i\theta},e^{i\phi})|^2 where p(z,w) is a po...
Symplectic 4-manifolds with fixed point free circle actions
Symplectic 4-manifolds point free circle actions Geometric Topology
2012/6/19
We show that recent results of Friedl-Vidussi and Chen imply that a symplectic manifold admits a fixed point free circle action if and only if it admits a symplectic circle action and we give a comple...
Limit-circle invariance of non-symmetric discrete Hamiltonian systems
difference operator deficiency index non-symmetric
2011/10/12
In this paper, we first give the related important Lemmas, and after discusses the non-symmetric discrete Hamiltonian system, and obtain the limit-circle invariance theorem. The main results contain c...
Dense properties of the space of the circle diffeomorphisms with a Liouville rotation number
circle diffeomorphism rotation number Liouville number conjugacy invariant measure fast approximation by conjugation
2011/9/23
Abstract: Given any Liouville number $\alpha$, it is shown that various subspaces are $C^\infty$-dense in the space of the orientation preserving $C^\infty$ diffeomorphisms of the circle with rotation...
Contact structures on principal circle bundles
principal circle bundles Symplectic Geometry
2011/9/20
Abstract: We describe a necessary and sufficient condition for a principal circle bundle over an even-dimensional manifold to carry an invariant contact structure. As a corollary it is shown that all ...
Complex structures on product of circle bundles over complex manifolds
Complex structures product of circle bundles complex manifolds
2011/1/17
Let ¯Li −→ Xi be a holomorphic line bundle over a compact complex manifold for i = 1, 2. Let Si denote the associated principal circle-bundle with respect to some hermitian inner product on...
Noncommutative circle bundles and new Dirac operators
Noncommutative circle bundles new Dirac operators
2011/1/21
We study the spectral triples over the total space of noncommutative principal U(1) bundles. Basing on the classical situation and the abstract algebraic approach we propose a definition of connection...
Circle action and some vanishing results on manifolds
circle action signature twisted signature operator rigidity
2011/1/19
Kawakubo and Uchida showed that, if a closed oriented 4k-dimensional manifold M admits a semi-free circle action such that the dimension of the fixed point set is less than 2k,then the signature of M ...
This paper is concerned with the study of a circular random distribution called geodesic Normal distribution recently proposed for general manifolds. This distribution, parameterized by two real numbe...
Shared inputs and desynchrony in elliptic bursters: from slow passage to discontinuous circle maps
Dynamical Systems (math.DS) Chaotic Dynamics (nlin.CD)
2010/11/10
What input signals will lead to synchrony vs. desynchrony in a group of biological oscillators? This question connects with both classical dynamical sys- tems analyses of entrainment and phase locking...
Twisted acyclicity of a circle and link signatures
Twisted acyclicity of a circle link signatures
2010/11/30
Homology of the circle with non-trivial local coefficients is trivial.From this well-known fact we deduce geometric corollaries concerning links of codimension two. In particular, the Murasugi-Tristra...