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Solvability of some integro-differential equations with the double scale anomalous diffusion in higher dimensions 一些具有高维双尺度反常扩散的积分微分方程的可解性
Pub Date : 2023-12-13 DOI: 10.1007/s00605-023-01927-x
Vitali Vougalter, Vitaly Volpert

The article is devoted to the studies of the existence of solutions of an integro-differential equation in the case of the double scale anomalous diffusion with the sum of the two negative Laplacians raised to two distinct fractional powers in ({mathbb R}^{d}, d=4, 5). The proof of the existence of solutions is based on a fixed point technique. Solvability conditions for the non-Fredholm elliptic operators in unbounded domains are used.

文章致力于研究双尺度反常扩散情况下的积分微分方程解的存在性,该方程的两个负拉普拉斯之和在 ({mathbb R}^{d}, d=4, 5) 中被提升到两个不同的分数幂。解的存在性证明基于定点技术。在无界域中使用了非弗雷德霍姆椭圆算子的可解性条件。
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引用次数: 0
Some inequalities for self-mappings of unit ball satisfying the invariant Laplacians 满足不变拉普拉斯算子的单位球自映射的若干不等式
Pub Date : 2023-11-27 DOI: 10.1007/s00605-023-01925-z
Deguang Zhong, Meilan Huang, Dongping Wei

In this paper, we study those mappings in unit ball satisfying the Dirichlet problem of the following differential operators

$$begin{aligned} Delta _{gamma }=big (1-|x|^{2}big )cdot left[ frac{1-|x|^{2}}{4}cdot sum _{i}frac{partial ^{2}}{partial x_{i}^{2}}+gamma sum _{i}x_{i}cdot frac{partial }{partial x_{i}}+gamma left( frac{n}{2}-1-gamma right) right] . end{aligned}$$

Our aim is to establish the Schwarz type inequality, Heinz-Schwarz type inequality and boundary Schwarz inequality for those mappings.

本文研究了单位球上满足以下微分算子Dirichlet问题的映射$$begin{aligned} Delta _{gamma }=big (1-|x|^{2}big )cdot left[ frac{1-|x|^{2}}{4}cdot sum _{i}frac{partial ^{2}}{partial x_{i}^{2}}+gamma sum _{i}x_{i}cdot frac{partial }{partial x_{i}}+gamma left( frac{n}{2}-1-gamma right) right] . end{aligned}$$,目的是建立这些映射的Schwarz型不等式、Heinz-Schwarz型不等式和边界Schwarz不等式。
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引用次数: 1
Strong tree properties, Kurepa trees, and guessing models 强树属性,Kurepa树和猜测模型
Pub Date : 2023-11-25 DOI: 10.1007/s00605-023-01922-2
Chris Lambie-Hanson, Šárka Stejskalová

We investigate the generalized tree properties and guessing model properties introduced by Weiß and Viale, as well as natural weakenings thereof, studying the relationships among these properties and between these properties and other prominent combinatorial principles. We introduce a weakening of Viale and Weiß’s Guessing Model Property, which we call the Almost Guessing Property, and prove that it provides an alternate formulation of the slender tree property in the same way that the Guessing Model Property provides and alternate formulation of the ineffable slender tree property. We show that instances of the Almost Guessing Property have sufficient strength to imply, for example, failures of square or the nonexistence of weak Kurepa trees. We show that these instances of the Almost Guessing Property hold in the Mitchell model starting from a strongly compact cardinal and prove a number of other consistency results showing that certain implications between the principles under consideration are in general not reversible. In the process, we provide a new answer to a question of Viale by constructing a model in which, for all regular (theta ge omega _2), there are stationarily many (omega _2)-guessing models (M in {mathscr {P}}_{omega _2} H(theta )) that are not (omega _1)-guessing models.

我们研究了Weiß和Viale引入的广义树性质和猜测模型性质,以及它们的自然弱点,研究了这些性质之间的关系以及这些性质与其他突出的组合原理之间的关系。我们引入了Viale和Weiß的猜测模型性质的弱化,我们称之为几乎猜测性质,并证明了它提供了细长树性质的替代表述,就像猜测模型性质提供了不可言说的细长树性质的替代表述一样。我们证明了几乎猜测性质的实例有足够的强度来暗示,例如,平方的失效或弱Kurepa树的不存在。我们表明,这些几乎猜测性质的实例在米切尔模型中成立,从一个强紧凑基数开始,并证明了许多其他一致性结果,表明所考虑的原则之间的某些含义通常是不可逆转的。在此过程中,我们通过构建一个模型为Viale的问题提供了一个新的答案,在这个模型中,对于所有规则(theta ge omega _2),都有静态的许多(omega _2) -猜测模型(M in {mathscr {P}}_{omega _2} H(theta ))而不是(omega _1) -猜测模型。
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引用次数: 0
Infinite products involving the period-doubling sequence 包含倍周期序列的无穷积
Pub Date : 2023-11-24 DOI: 10.1007/s00605-023-01923-1
John M. Campbell

We explore the evaluation of infinite products involving the automatic sequence ((d_{n}: n in mathbb {N}_{0})) known as the period-doubling sequence, inspired by the work of Allouche, Riasat, and Shallit on the evaluation of infinite products involving the Thue–Morse or Golay–Shapiro sequences. Our methods allow for the application of integral operators that result in new product expansions for expressions involving the dilogarithm function, resulting in new formulas involving Catalan’s constant G, such as the formula

$$begin{aligned} prod _{n=1}^{infty } left( left( frac{n+2}{n}right) ^{n+1} left( frac{4 n + 3}{4 n+5}right) ^{4 n+4}right) ^{d_{n}} = frac{e^{frac{2 G}{pi }}}{sqrt{2}} end{aligned}$$

introduced in this article. More generally, the evaluation of infinite products of the form ( prod _{n=1}^{infty } e(n)^{d_{n}} ) for an elementary function e(n) is the main purpose of our article. Past work on infinite products involving automatic sequences has mainly concerned products of the form ( prod _{n=1}^{infty } R(n)^{a(n)} ) for an automatic sequence a(n) and a rational function R(n), in contrast to our results as in above displayed product evaluation. Our methods also allow us to obtain new evaluations involving (frac{zeta (3)}{pi ^2}) for infinite products involving the period-doubling sequence.

我们从Allouche, Riasat和Shallit对涉及Thue-Morse或Golay-Shapiro序列的无限积的评估工作的启发,探索了涉及自动序列((d_{n}: n in mathbb {N}_{0}))的无限积的评估,称为倍周期序列。我们的方法允许应用积分运算符,对涉及二重函数的表达式进行新的乘积展开,从而产生涉及加泰罗尼亚常数G的新公式,例如本文中介绍的公式$$begin{aligned} prod _{n=1}^{infty } left( left( frac{n+2}{n}right) ^{n+1} left( frac{4 n + 3}{4 n+5}right) ^{4 n+4}right) ^{d_{n}} = frac{e^{frac{2 G}{pi }}}{sqrt{2}} end{aligned}$$。更一般地说,对于初等函数e(n),求形式为( prod _{n=1}^{infty } e(n)^{d_{n}} )的无穷积的值是本文的主要目的。过去关于涉及自动序列的无穷积的工作主要是关于自动序列a(n)和有理函数R(n)的乘积( prod _{n=1}^{infty } R(n)^{a(n)} )的形式,与我们的结果相反,如上所示的产品评估。我们的方法还允许我们获得涉及(frac{zeta (3)}{pi ^2})的涉及周期加倍序列的无限乘积的新评估。
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引用次数: 0
Cohomology of quasi-abelianized braid groups 拟阿贝尔化辫群的上同调
Pub Date : 2023-11-24 DOI: 10.1007/s00605-023-01924-0
Filippo Callegaro, Ivan Marin

We investigate the rational cohomology of the quotient of (generalized) braid groups by the commutator subgroup of the pure braid groups. We provide a combinatorial description of it using isomorphism classes of certain families of graphs. We establish Poincaré dualities for them and prove a stabilization property for the infinite series of reflection groups.

研究了广义编织群的商与纯编织群的对易子群的有理上同调。我们利用某些图族的同构类给出了它的组合描述。建立了它们的庞卡罗对偶性,并证明了无穷级数反射群的镇定性。
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引用次数: 0
A short note on coproducts of Abelian pro-Lie groups 关于阿贝尔亲李群的副积的简短说明
Pub Date : 2023-11-19 DOI: 10.1007/s00605-023-01915-1
Wolfgang Herfort, Karl H. Hofmann, Francesco G. Russo

The notion of conditional coproduct of a family of abelian pro-Lie groups in the category of abelian pro-Lie groups is introduced. It is shown that the cartesian product of an arbitrary family of abelian pro-Lie groups can be characterized by the universal property of the conditional coproduct.

在阿贝尔亲李群的范畴中,引入了阿贝尔亲李群族的条件余积的概念。证明了任意一族阿贝尔亲李群的笛卡儿积可以用条件副积的全称性质来表征。
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引用次数: 0
An extension of Aigner’s theorem 艾格纳定理的推广
Pub Date : 2023-11-18 DOI: 10.1007/s00605-023-01913-3
Nguyen Xuan Tho

In 1957, Aigner (Monatsh Math 61:147–150, 1957) showed that the equations (x^6+y^6=z^6) and (x^9+y^9=z^9) have no solutions in any quadratic number field with (xyzne 0). We show that Aigner’s result holds for all equations (x^{3n}+y^{3n}=z^{3n}), where (nge 2) is a positive integer. The proof combines Aigner’s idea with deep results on Fermat’s equation and its variants.

1957年,Aigner (Monatsh Math 61:147-150, 1957)证明了方程(x^6+y^6=z^6)和(x^9+y^9=z^9)在含有(xyzne 0)的任何二次数域中都无解。我们证明Aigner的结果适用于所有方程(x^{3n}+y^{3n}=z^{3n}),其中(nge 2)是一个正整数。这个证明结合了艾格纳的思想和费马方程及其变体的深刻结果。
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引用次数: 0
A Voronoi summation formula for non-holomorphic Maass forms of half-integral weight 半积分权的非全纯质量形式的Voronoi求和公式
Pub Date : 2023-11-18 DOI: 10.1007/s00605-023-01921-3
Olga Balkanova, Dmitry Frolenkov

We prove a Voronoi summation formula for non-holomorphic half-integral weight Maass forms on (Gamma _0(4)) without any restrictions on the denominator of a fraction in the exponential function. As an application we obtain a Voronoi summation formula for the values of Zagier L-series.

本文证明了(Gamma _0(4))上非全纯半积分权质量形式的Voronoi求和公式,该公式对指数函数中分数的分母没有任何限制。作为应用,我们得到了Zagier l -级数值的Voronoi求和公式。
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引用次数: 0
Eigenvalues of truncated unitary matrices: disk counting statistics 截断酉矩阵的特征值:磁盘计数统计
Pub Date : 2023-11-16 DOI: 10.1007/s00605-023-01920-4
Yacin Ameur, Christophe Charlier, Philippe Moreillon

Let T be an (ntimes n) truncation of an ((n+alpha )times (n+alpha )) Haar distributed unitary matrix. We consider the disk counting statistics of the eigenvalues of T. We prove that as (nrightarrow + infty ) with (alpha ) fixed, the associated moment generating function enjoys asymptotics of the form

$$begin{aligned} exp big ( C_{1} n + C_{2} + o(1) big ), end{aligned}$$

where the constants (C_{1}) and (C_{2}) are given in terms of the incomplete Gamma function. Our proof uses the uniform asymptotics of the incomplete Beta function.

设T是((n+alpha )times (n+alpha )) Haar分布酉矩阵的(ntimes n)截断。我们考虑了t的特征值的盘计数统计。我们证明了当(nrightarrow + infty )与(alpha )固定时,相关的矩生成函数具有$$begin{aligned} exp big ( C_{1} n + C_{2} + o(1) big ), end{aligned}$$形式的渐近性,其中常数(C_{1})和(C_{2})是用不完全Gamma函数给出的。我们的证明使用了不完全函数的一致渐近性。
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引用次数: 1
Maximal run-length function with constraints: a generalization of the Erdős–Rényi limit theorem and the exceptional sets 带约束的最大游程函数:Erdős-Rényi极限定理和例外集的推广
Pub Date : 2023-11-13 DOI: 10.1007/s00605-023-01919-x
Yu-Feng Wu
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Monatshefte für Mathematik
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