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On the integral means spectrum of univalent functions with quasconformal extensions 论具有准共形扩展的单值函数的积分手段谱
Pub Date : 2024-07-27 DOI: arxiv-2407.19240
Jianjun Jin
In this note we show that the integral means spectrum of any univalentfunction admitting a quasiconformal extension to the extended complex plane isstrictly less than the universal integral means spectrum. This gives anaffirmative answer to a question raised in our recent paper.
在这篇论文中,我们证明了任何单值函数(univalentfunction)的积分均方差谱,只要它允许向扩展复平面进行类平方扩展,那么它的积分均方差谱就严格小于普遍积分均方差谱。这就肯定地回答了我们最近论文中提出的一个问题。
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引用次数: 0
A note on meromorphic functions on a compact Riemann surface having poles at a single point 关于紧凑黎曼曲面上有单点极点的微函数的说明
Pub Date : 2024-07-25 DOI: arxiv-2407.18286
V V Hemasundar Gollakota
On a compact Riemann surface $X$ of genus $g$, one of the questions is theexistence of meromorphic functions having poles at a point $P$ on $X$. One ofthe theorems is the Weierstrass gap theorem that determines a sequence of $g$numbers $1 < n_k < 2g$, $1 leq k leq g$ for which a meromorphic function withthe order with $n_k$ fails to exist at $P$. In this note, we give proof of theWeierstrass gap theorem in cohomology terminology. We see that an interestingcombinatorial problem may be formed as a byproduct from the statement of theWeierstrass gap theorem.
在属$g$的紧凑黎曼曲面$X$上,其中一个问题是在$X$上的点$P$上存在有极点的分形函数。其中一个定理是魏尔斯特拉斯间隙定理(Weierstrass gap theorem),该定理确定了一个$g$数序列:$1 < n_k < 2g$,$1 leq k leq g$,对于该序列,在$P$处不存在阶数为$n_k$的分垂函数。在本注中,我们用同调术语证明了韦尔斯特拉斯缺口定理。我们发现,从韦尔斯特拉斯间隙定理的陈述中可以得到一个有趣的组合问题作为副产品。
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引用次数: 0
All Teichmuller spaces are not starlike 所有的 Teichmuller 空间都不是星形的
Pub Date : 2024-07-25 DOI: arxiv-2407.18239
Samuel L. Krushkal
This paper is the final step in solving the problem of starlikeness ofTeichmuller spaces in Bers' embedding. This step concerns the case of finitedimensional Teichmuller spaces ${mathbf T}(g, n)$ of positive dimension(corresponding to punctured Riemann surfaces of finite conformal type $(g, n)$with $2g - 2 + n > 0$).
本文是解决贝尔斯嵌入中的泰赫穆勒空间的星象性问题的最后一步。这一步涉及正维度的有限维特赫穆勒空间 ${mathbf T}(g, n)$ 的情况(对应于有限共形类型 $(g, n)$ 的点状黎曼曲面,2g - 2 + n > 0$)。
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引用次数: 0
Turán type oscillation inequalities in $L^q$ norm on the boundary of convex polygonal domains 凸多边形域边界上的$L^q$规范中的图兰型振荡不等式
Pub Date : 2024-07-25 DOI: arxiv-2407.18404
Polina Glazyrina, Szilárd Gy. Révész
In 1939 P'al Tur'an and J'anos ErH{o}d initiated the study of lowerestimations of maximum norms of derivatives of polynomials, in terms of themaximum norms of the polynomials themselves, on convex domains of the complexplane. As a matter of normalization they considered the family$mathcal{P}_n(K)$ of degree $n$ polynomials with all zeros lying in the givenconvex, compact subset $KSubset {mathbb C}$. While Tur'an obtained the firstresults for the interval $I:=[-1,1]$ and the disk $D:={ zin {mathbb C}~:~|z|le 1}$, ErH{o}d extended investigations to other compact convex domains,too. The order of the optimal constant was found to be $sqrt{n}$ for $I$ and$n$ for $D$. It took until 2006 to clarify that all compact convexemph{domains} (with nonempty interior), follow the pattern of the disk, andadmit an order $n$ inequality. For $L^q(partial K)$ norms with any $1le q
1939 年,P'al Tur'an 和 J'anos ErH{o}d 开始在复平面的凸域上研究用多项式本身的最大规范来降低多项式导数的最大规范。作为归一化的问题,他们考虑了所有零点都位于给定的凸紧凑子集 $KSubset {mathbb C}$ 的度 $n$ 多项式族 $mathcal{P}_n(K)$。当 Tur'an 在区间 $I:=[-1,1]$ 和圆盘 $D:={ zin {mathbb C}~:~|z|le 1}$ 得到第一个结果时,ErH{o}d 也把研究扩展到了其他紧凑凸域。发现最优常数的阶数对于 $I$ 是 $sqrt{n}$ ,对于 $D$ 是 $n$。直到 2006 年,我们才明确了所有紧凑凸域(内部非空)都遵循圆盘的模式,并包含阶数为 $n$ 的不等式。对于任意$1le q
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引用次数: 0
Parametric Symplectic Jet Interpolation 参数交映射流插值
Pub Date : 2024-07-24 DOI: arxiv-2407.17581
Rafael B. Andrist, Gaofeng Huang, Frank Kutzschebauch, Josua Schott
We prove a parametric jet interpolation theorem for symplectic holomorphicautomorphisms of $mathbb{C}^{2n}$ with parameters in a Stein space. Moreover,we provide an example of an unavoidable set for symplectic holomorphic maps.
我们证明了参数为 Stein 空间的 $mathbb{C}^{2n}$ 的交映全形自变量的参数射流插值定理。此外,我们还提供了一个交映全形映射不可避免集的例子。
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引用次数: 0
Some variants of the generalized Borel Theorem and applications 广义伯勒定理的一些变体及其应用
Pub Date : 2024-07-23 DOI: arxiv-2407.16163
Dinh Tuan Huynh
In the first part of this paper, we establish some results around generalizedBorel's Theorem. As an application, in the second part, we construct example ofsmooth surface of degree $dgeq 19$ in $mathbb{CP}^3$ whose complements ishyperbolically embedded in $mathbb{CP}^3$. This improves the previousconstruction of Shirosaki where the degree bound $d=31$ was gave. In the lastpart, for a Fermat-Waring type hypersurface $D$ in $mathbb{CP}^n$ defined bythe homogeneous polynomial [ sum_{i=1}^m h_i^d, ] where $m,n,d$ are positiveintegers with $mgeq 3n-1$ and $dgeq m^2-m+1$, where $h_i$ are homogeneousgeneric linear forms on $mathbb{C}^{n+1}$, for a nonconstant holomorphicfunction $fcolonmathbb{C}rightarrowmathbb{CP}^n$ whose image is notcontained in the support of $D$, we establish a Second Main Theorem typeestimate: [ big(d-m(m-1)big),T_f(r)leq N_f^{[m-1]}(r,D)+S_f(r). ] Thisquantifies the hyperbolicity result due to Shiffman-Zaidenberg and Siu-Yeung.
在本文的第一部分,我们围绕广义玻雷尔定理(generalizedBorel's Theorem)建立了一些结果。作为应用,在第二部分中,我们构造了$mathbb{CP}^3$中度为$dgeq 19$的光滑曲面的例子,它的补集是超布尔嵌入$mathbb{CP}^3$的。这改进了 Shirosaki 以前给出的度数约束 $d=31$ 的构造。在最后一部分,对于$mathbb{CP}^n$中的费马-瓦林型超曲面$D$,由同次多项式 [ sum_{i=1}^m h_i^d, ] 定义,其中$m,n,d$为正整数,$mgeq 3n-1$,$dgeq m^2-m+1$、其中 $h_i$ 是 $mathbb{C}^{n+1}$ 上的同素异形线性形式,对于非恒定全形函数 $fcolonmathbb{C}rightarrowmathbb{CP}^n$ 而其图像不包含在 $D$ 的支持中,我们建立了第二主定理的类型估计:[ big(d-m(m-1)big),T_f(r)leq N_f^{[m-1]}(r,D)+S_f(r).]这证明了 Shiffman-Zaidenberg 和 Siu-Yeung 的双曲性结果。
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引用次数: 0
Conformally Natural Families of Probability Distributions on Hyperbolic Disc with a View on Geometric Deep Learning 双曲圆盘上概率分布的共形自然族与几何深度学习视角
Pub Date : 2024-07-23 DOI: arxiv-2407.16733
Vladimir Jacimovic, Marijan Markovic
We introduce the novel family of probability distributions on hyperbolicdisc. The distinctive property of the proposed family is invariance under theactions of the group of disc-preserving conformal mappings. Thegroup-invariance property renders it a convenient and tractable model forencoding uncertainties in hyperbolic data. Potential applications in GeometricDeep Learning and bioinformatics are numerous, some of them are brieflydiscussed. We also emphasize analogies with hyperbolic coherent states inquantum physics.
我们介绍了双曲圆盘上的新型概率分布族。该族的独特性质是在保留圆盘的共形映射组的作用下不变。群不变性特性使其成为双曲数据不确定性编码的便捷模型。几何深度学习和生物信息学的潜在应用非常多,我们将简要讨论其中的一些应用。我们还强调了与量子物理学中双曲相干态的类比。
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引用次数: 0
Kobayashi hyperbolicity in Riemannian manifolds 黎曼流形中的小林双曲性
Pub Date : 2024-07-22 DOI: arxiv-2407.15976
Hervé Gaussier, Alexandre Sukhov
We study the boundary behavior of the Kobayashi-Royden metric and theKobayashi hyperbolicity of domains in Riemannian manifolds.
我们研究了小林-罗伊登公设的边界行为和黎曼流形中域的小林双曲性。
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引用次数: 0
Unbounded operators and the uncertainty principle 无界算子和不确定性原理
Pub Date : 2024-07-22 DOI: arxiv-2407.15803
Friedrich Haslinger
We study a variant of the uncertainty principle in terms of the annihilationand creation operator on generalized Segal Bargmann spaces, which are used forthe FBI-Bargmann transform. In addition, we compute the Berezin transform ofthese operators and indicate how to use spaces of entire functions in onevariable to study the SzegH{o} kernel for hypersurfaces in $mathbb C^2.$
我们用广义西格尔-巴格曼空间上的湮灭与创造算子来研究不确定性原理的变体,这些算子被用于联邦调查局-巴格曼变换。此外,我们还计算了这些算子的贝雷津变换,并指出了如何使用单变量全函数空间来研究$mathbb C^2.$中超曲面的SzegH{o}核。
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引用次数: 0
Geometric subfamily of functions convex in some direction and Blaschke products 沿某一方向凸的函数几何亚族和布拉什克积
Pub Date : 2024-07-20 DOI: arxiv-2407.14922
Liulan Li, Saminthan Ponnusamy
Consider the family of locally univalent analytic functions $h$ in the unitdisk $|z|<1$ with the normalization $h(0)=0$, $h'(0)=1$ and satisfying thecondition $${real} left( frac{z h''(z)}{alpha h'(z)}right)
考虑单位盘$|z|<1$中局部不等价解析函数$h$的族,其归一化为$h(0)=0$, $h'(0)=1$,并满足条件$${real}。left( frac{z h''(z)}{alpha h'(z)}right)
{"title":"Geometric subfamily of functions convex in some direction and Blaschke products","authors":"Liulan Li, Saminthan Ponnusamy","doi":"arxiv-2407.14922","DOIUrl":"https://doi.org/arxiv-2407.14922","url":null,"abstract":"Consider the family of locally univalent analytic functions $h$ in the unit\u0000disk $|z|<1$ with the normalization $h(0)=0$, $h'(0)=1$ and satisfying the\u0000condition $${real} left( frac{z h''(z)}{alpha h'(z)}right) <frac{1}{2}\u0000~mbox{ for $zin ID$,} $$ where $0<alphaleq1$. The aim of this article is\u0000to show that this family has several elegant properties such as involving\u0000Blaschke products, Schwarzian derivative and univalent harmonic mappings.","PeriodicalId":501142,"journal":{"name":"arXiv - MATH - Complex Variables","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141772587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
arXiv - MATH - Complex Variables
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