Differential equations, mirror maps and zeta values

Rooted tree maps and the Kawashima relations for multiple zeta values

Recently, inspired by the Connes-Kreimer Hopf algebra of rooted trees, the second named author introduced rooted tree maps as a family of linear maps on the noncommutative polynomial algebra in two letters. These give a class of relations among multiple zeta values, which are known to be a subclass of the so-called linear part of the Kawashima relations. In this paper we show the opposite implication, that is the linear part of the Kawashima relations is implied by the relations coming from rooted tree maps.

从零 genus 的 zeta 生成器导出动机共作用和单值映射

Deriving motivic coactions and single-valued maps at genus zero from zeta generators

本文通过 zeta 生成器证明了零 genus 多重 polylogarithms 的动机共作用和单值映射猜想，结合了非交换变量的操作和生成函数。

非阿基米德有理映射的鲁厄ζ函数

Ruelle's zeta function for non-Archimedean rational maps

本文研究了非阿基米德有理映射的鲁厄ζ函数及其相关性质，证明了其解析性并探讨了朱利亚集的形状。

Greene--Plesser 镜像的镜像映射整性与算术同调镜像对称性

Integrality of mirror maps and arithmetic homological mirror symmetry for Greene--Plesser mirrors

本文通过同调镜像对称性的算术精化证明了 Greene--Plesser 镜像对的镜像映射整性猜想，并利用新的通用性论证在所有具有良好约化的特征下推广了同调镜像对称性。

On the integrality of factorial ratios and mirror maps

Landau has characterized the integrality of certain ratios of factorials. Delaygue has characterized the integrality of the Taylor coefficients of certain mirror maps constructed from series involving those ratios. Using the $A$-hypergeometric point of view, we express those characterizations in terms of the nonexistence of interior points in multiples of the associated lattice polytope.

关于镜像映射系数的正性与整性

On the positivity and integrality of coefficients of mirror maps

本文提出镜像映射正整性现象的推广，探讨镜像对中Calabi-Yau完全交集的构造，并区分真镜像映射与朴素镜像映射的系数性质。

The depth structure of motivic multiple zeta values

In this paper, we construct some maps related to the motivic Galois action on depth-graded motivic multiple zeta values. And from these maps we give some short exact sequences about depth-graded motivic multiple zeta values in depth two and three. In higher depth we conjecture that there are exact sequences of the same type. And we will show from three conjectures about depth-graded motivic Lie algebra we can nearly deduce the exact sequences conjectures in higher depth. At last we give a new proof of the result that the modulo zeta(2)$ version motivic double zeta values is generated by the to…

Analytic properties of mirror maps

We consider a multi-parameter family of canonical coordinates and mirror maps o\ riginally introduced by Zudilin [Math. Notes 71 (2002), 604-616]. This family includes many of the known one-variable mirror maps as special cases, in particular many of modular origin and the celebrated example of Candelas, de la Ossa, Green and\ Parkes [Nucl. Phys. B359 (1991), 21-74] associated to the quintic hypersurface in $\mathbb P^4(\mathbb C)$. In [Duke Math. J. 151 (2010), 175-218], we proved that all coeffi\ cients in the Taylor expansions at 0 of these canonical coordinates (and, hence, of the correspo…

On the integrality of the Taylor coefficients of mirror maps

We show that the Taylor coefficients of the series ${\bf q}(z)=z\exp({\bf G}(z)/{\bf F}(z))$ are integers, where ${\bf F}(z)$ and ${\bf G}(z)+\log(z) {\bf F}(z)$ are specific solutions of certain hypergeometric differential equations with maximal unipotent monodromy at $z=0$. We also address the question of finding the largest integer $u$ such that the Taylor coefficients of $(z ^{-1}{\bf q}(z))^{1/u}$ are still integers. As consequences, we are able to prove numerous integrality results for the Taylor coefficients of mirror maps of Calabi-Yau complete intersections in weighted projective spac…

关于镜像映射整性的一则注记

A note on the integrality of mirror maps

该注记给出一类具有镜像映射整性的$A$-超几何系统示例，刻画其解的形式与整系数性质，且仅用初等同余即可完成证明。

Multivariate $p$-adic formal congruences and integrality of Taylor coefficients of mirror maps

We generalise Dwork's theory of $p$-adic formal congruences from the univariate to a multi-variate setting. We apply our results to prove integrality assertions on the Taylor coefficients of (multi-variable) mirror maps. More precisely, with $\mathbf z=(z_1,z_2,...,z_d)$, we show that the Taylor coefficients of the multi-variable series $q(\mathbf z)=z_i\exp(G(\mathbf z)/F(\mathbf z))$ are integers, where $F(\mathbf z)$ and $G(\mathbf z)+\log(z_i) F(\mathbf z)$, $i=1,2,...,d$, are specific solutions of certain GKZ systems. This result implies the integrality of the Taylor coefficients of numer…

Orbits for products of maps

We study the behaviour of the dynamical zeta function and the orbit Dirichlet series for products of maps. The behaviour under products of the radius of convergence for the zeta function, and the abscissa of convergence for the orbit Dirichlet series, are discussed. The orbit Dirichlet series of the cartesian cube of a map with one orbit of each length is shown to have a natural boundary.

与多重 Eisenstein 级数和多重 q-zeta 值相关的形式多重 zeta 值的一种推广

A generalization of formal multiple zeta values related to multiple Eisenstein series and multiple q-zeta values

本文构造 $τ$-不变平衡拟洗牌代数 $\mathcal{G}^{\operatorname{f}}$ 以统一形式化多重 Eisenstein 级数与多重 q-zeta 值，并通过仿射概形 BM 推广 Racinet 的 DM，建立向形式多重 zeta 值的投影。

Negative values of the Riemann zeta function on the critical line

We investigate the intersections of the curve $\mathbb{R}\ni t\mapsto ζ({1\over 2}+it)$ with the real axis. We show unconditionally that the zeta-function takes arbitrarily large positive and negative values on the critical line.

Renormalisation and locality: branched zeta values

Multivariate renormalisation techniques are implemented in order to build, study and then renormalise at the poles, branched zeta functions associated with trees. For this purpose, we first prove algebraic results and develop analytic tools, which we then combine to study branched zeta functions. The algebraic aspects concern universal properties for locality algebraic structures, some of which had been discussed in previous work; we "branch/ lift" to trees operators acting on the decoration set of trees, and factorise branched maps through words by means of universal properties for words whic…

Dynamically affine maps in positive characteristic

We study fixed points of iterates of dynamically affine maps (a generalisation of Lattès maps) over algebraically closed fields of positive characteristic $p$. We present and study certain hypotheses that imply a dichotomy for the Artin-Mazur zeta function of the dynamical system: it is either rational or non-holonomic, depending on specific characteristics of the map. We also study the algebraicity of the so-called tame zeta function, the generating function for periodic points of order coprime to $p$. We then verify these hypotheses for dynamically affine maps on the projective line, general…

Modular symbols and the integrality of zeta elements

We consider modifications of Manin symbols in first homology groups of modular curves with p-adic integer coefficients for an odd prime p. We show that these symbols generate homology in primitive eigenspaces for the action of diamond operators, with a certain condition on the eigenspace that can be removed on Eisenstein parts. We apply this to prove the integrality of maps taking compatible systems of Manin symbols to compatible systems of zeta elements. In the work of the first two authors on an Iwasawa-theoretic conjecture of the third author, these maps are constructed with certain bounded…

On the value-distribution of the Riemann zeta-function on the critical line

We investigate the intersections of the curve $\mathbb{R}\ni t\mapsto ζ({1\over 2}+it)$ with the real axis. We show that if the Riemann hypothesis is true, the mean-value of those real values exists and is equal to 1. Moreover, we show unconditionally that the zeta-function takes arbitrarily large real values on the critical line.

On Dwork's p-adic formal congruences theorem and hypergeometric mirror maps

Using Dwork's theory, we prove a broad generalisation of his famous p-adic formal congruences theorem. This enables us to prove certain p-adic congruences for the generalized hypergeometric series with rational parameters; in particular, they hold for any prime number p and not only for almost all primes. Along the way, using Christol's functions, we provide an explicit formula for the "Eisenstein constant" of any globally bounded hypergeometric series with rational parameters. As an application of these results, we obtain an arithmetic statement of a new type concerning the integrality of Tay…

On the integrality of the Taylor coefficients of mirror maps

We show that the Taylor coefficients of the series ${\bf q}(z)=z\exp({\bf G}(z)/{\bf F}(z))$ are integers, where ${\bf F}(z)$ and ${\bf G}(z)+\log(z) {\bf F}(z)$ are specific solutions of certain hypergeometric differential equations with maximal unipotent monodromy at $z=0$. We also address the question of finding the largest integer $u$ such that the Taylor coefficients of $(z ^{-1}{\bf q}(z))^{1/u}$ are still integers. As consequences, we are able to prove numerous integrality results for the Taylor coefficients of mirror maps of Calabi-Yau complete intersections in weighted projective spac…

关于任意数域上奇数 zeta 值与扩展 Eisenstein 级数的一个注记

A note on odd zeta values over any number field and Extended Eisenstein series

本文推广了 Ramanujan 关于 Riemann zeta 函数的恒等式，建立任意数域上奇数 zeta 值的变换公式，并由此构造满足模变换的扩展 Eisenstein 级数，为研究奇数 zeta 值与 Lambert 级数提供新工具。

On the integrality of the Taylor coefficients of mirror maps, II

We continue our study begun in "On the integrality of the Taylor coefficients of mirror maps" (arXiv:0907.2577) of the fine integrality properties of the Taylor coefficients of the series ${\bf q}(z)=z\exp({\bf G}(z)/{\bf F}(z))$, where ${\bf F}(z)$ and ${\bf G}(z)+\log(z) {\bf F}(z)$ are specific solutions of certain hypergeometric differential equations with maximal unipotent monodromy at $z=0$. More precisely, we address the question of finding the largest integer $v$ such that the Taylor coefficients of $(z ^{-1}{\bf q}(z))^{1/v}$ are still integers. In particular, we determine the Dwork-K…

On the value distribution and moments of the Epstein zeta function to the right of the critical strip

We study the Epstein zeta function $E_n(L,s)$ for $s>\frac{n}{2}$ and determine for fixed $c>\frac{1}{2}$ the value distribution and moments of $E_n(\cdot,cn)$ (suitably normalized) as $n\to\infty$. We further discuss the random function $c\mapsto E_n(\cdot,cn)$ for $c\in[A,B]$ with $\frac{1}{2}<A<B$ and determine its limit distribution as $n\to\infty$.

Criterion for the integrality of the Taylor coefficients of mirror maps in several variables

We give a necessary and sufficient condition for the integrality of the Taylor coefficients at the origin of formal power series $q_i({\mathbf z})=z_i\exp(G_i({\mathbf z})/F({\mathbf z}))$, with ${\mathbf z}=(z_1,...,z_d)$ and where $F({\mathbf z})$ and $G_i({\mathbf z})+\log(z_i)F({\mathbf z})$, $i=1,...,d$ are particular solutions of certain A-systems of differential equations. This criterion is based on the analytical properties of Landau's function (which is classically associated with the sequences of factorial ratios) and it generalizes the criterion in the case of one variable presented…

多参数卡拉比-叶猜想三重流形的局部ζ函数从皮卡-福克斯方程

Local Zeta Functions of Multiparameter Calabi-Yau Threefolds from the Picard-Fuchs Equations

本文提出了一种改进的框架，用于计算多参数卡拉比-叶三重流形的局部ζ函数，并通过实例验证了方法的实用性。

An explicit theory of $π_{1}^{\un,\crys}(\mathbb{P}^{1} - \{0,μ_{N},\infty\})$ - II-2 : From standard algebraic relations of weighted multiple harmonic sums to those of cyclotomic $p$-adic multiple zeta values

Let $X_{0}=\mathbb{P}^{1} - (\{0,\infty\} \cup μ_{N})\text{ }/\text{ }\mathbb{F}_{q}$, with $N \in \mathbb{N}^{\ast}$ and $\mathbb{F}_{q}$ of characteristic $p>0$ and containing a primitive $N$-th root of unity. We establish an explicit theory of the crystalline pro-unipotent fundamental groupoid of $X_{0}$. In part I, we have computed explicitly the Frobenius, and in particular cyclotomic $p$-adic multiple zeta values. In part II, we use part I to understand the algebraic relations of cyclotomic $p$-adic multiple zeta values via explicit formulas ; this is in particular a study of the harmoni…

Motivic Multiple Zeta Values and Superstring Amplitudes

The structure of tree-level open and closed superstring amplitudes is analyzed. For the open superstring amplitude we find a striking and elegant form, which allows to disentangle its alpha'-expansion into several contributions accounting for different classes of multiple zeta values. This form is bolstered by the decomposition of motivic multiple zeta values, i.e. the latter encapsulate the alpha'-expansion of the superstring amplitude. Moreover, a morphism induced by the coproduct maps the alpha'-expansion onto a non-commutative Hopf algebra. This map represents a generalization of the symbo…

Critère pour l'intégralité des coefficients de Taylor des applications miroir

We give a necessary and sufficient condition for the integrality of the Taylor coefficients of mirror maps at the origin. By mirror maps, we mean formal power series z.exp(G(z)/F(z)), where F(z) and G(z)+log(z)F(z) are particular solutions of certain generalized hypergeometric differential equations. This criterion is based on the analytical properties of Landau's function (which is classically associated to the sequences of factorial ratios) and it generalizes results proved by Krattenthaler-Rivoal in "On the integrality of the Taylor coefficients of mirror maps" (to appear in Duke Math. J.).…

正特征域中的 Hopf 代数与交错多重 zeta 值

Hopf algebras and alternating multiple zeta values in positive characteristic

本文构造了正特征域中交错多重 zeta 值的代数与 Hopf 代数结构，扩展了先前工作，其证明基于 shuffle Hopf 代数的显式构造和水平映射概念，可视为经典背景下 Hoffman 和 Racinet 结果的类似物。

Two New Zeta Constants: Fractal String, Continued Fraction, and Hypergeometric Aspects of the Riemann Zeta Function

The Riemann zeta function at integer arguments can be written as an infinite sum of certain hypergeometric functions and more generally the same can be done with polylogarithms, for which several zeta functions are a special case. An analytic continuation formula for these hypergeometric functions exists and is used to derive some infinite sums which allow the zeta function at integer arguments n to be written as a weighted infinite sum of hypergeometric functions at n - 1. The form might be considered to be a shift operator for the Riemann zeta function which leads to the curious values ζF(0)…

多重 zeta 值树化之间的一个映射

A map between arborifications of multiple zeta values

本文针对 Manchon 提出的问题，利用平面有根树和递归方法构造了两个 BCK Hopf 代数之间的自然映射，使树化多重 zeta 值的级数与积分表达式对应图表交换。