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Related papers: Some relations for one-part double Hurwitz numbers

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A survey on the generalizations of Heisenberg uncertainty relation and a general scheme for their entangled extensions to several states and observables is presented. The scheme is illustrated on the examples of one and two states and…

Quantum Physics · Physics 2016-09-08 D. A. Trifonov

We connect generalizations of the classical Hurwitz class numbers coming from two different frameworks: one introduced by Pei and Wang, arising from the generalized Cohen--Eisenstein series, and another by Li, Skoruppa, and Zhou, arising…

Number Theory · Mathematics 2026-04-30 Ngoc Trinh Le

In this short note we present some remarks and conjectures on two of Erd\"os's open problems in number theory.

General Mathematics · Mathematics 2007-05-23 Florentin Smarandache

In this paper we study relations between intersection numbers on moduli spaces of curves and Hurwitz numbers. First, we prove two formulas expressing Hurwitz numbers of (generalized) polynomials via intersections on moduli spaces of curves.…

Algebraic Geometry · Mathematics 2010-10-04 Sergei Shadrin

The main aim of this paper is to give a new generalization of Hurwitz-Lerch Zeta function of two variables.Also, we investigate several interesting properties such as integral representations, summation formula and a connection with…

Classical Analysis and ODEs · Mathematics 2019-01-17 Kottakkaran Sooppy Nisar

We exhibit a generating function of spin Hurwitz numbers analogous to (disconnected) double Hurwitz numbers that is a tau function of the two-component BKP (2-BKP) hierarchy and is a square root of a tau function of the two-component KP…

Algebraic Geometry · Mathematics 2019-06-24 Junho Lee

Probably we have observed a new simple phenomena dealing with approximations to two real numbers.

Number Theory · Mathematics 2009-10-14 Igor D. Kan , Nikolay G. Moshchevitin

In the Hurwitz space of rational functions on CP^1 with poles of given orders, we study the loci of multisingularities, that is, the loci of functions with a given ramification profile over 0. We prove a recursion relation on the Poincare…

Algebraic Geometry · Mathematics 2019-08-02 Maxim Kazarian , Sergei Lando , Dimitri Zvonkine

In general, Hurwitz numbers count branched covers of the Riemann sphere with prescribed ramification data, or equivalently, factorisations in the symmetric group with prescribed cycle structure data. In this paper, we initiate the study of…

Geometric Topology · Mathematics 2015-11-10 Norman Do , Maksim Karev

We study double Hurwitz numbers in genus zero counting the number of covers $\CP^1\to\CP^1$ with two branching points with a given branching behavior. By the recent result due to Goulden, Jackson and Vakil, these numbers are piecewise…

Algebraic Geometry · Mathematics 2018-07-18 Sergei Shadrin , Michael Shapiro , Alek Vainshtein

This survey grew out of notes accompanying a cycle of lectures at the workshop Modern Trends in Gromov-Witten Theory, in Hannover. The lectures are devoted to interactions between Hurwitz theory and Gromov-Witten theory, with a particular…

Algebraic Geometry · Mathematics 2016-04-14 Renzo Cavalieri

We derive the spectral curves for $q$-part double Hurwitz numbers, $r$-spin simple Hurwitz numbers, and arbitrary combinations of these cases, from the analysis of the unstable (0,1)-geometry. We quantize this family of spectral curves and…

Algebraic Geometry · Mathematics 2024-06-26 Motohico Mulase , Sergey Shadrin , Loek Spitz

Considering some parameters and by means of an inequality of Hadamard, we derive general half-discrete Hilbert-type inequalities. Then we highlight some special cases.

Functional Analysis · Mathematics 2016-01-06 Waleed Abuelela

A generalization of Hurwitz stable polynomials to real rational functions is considered. We establishe an analogue of the Hurwitz stability criterion for rational functions and introduce a new type of determinants that can be treated as a…

Classical Analysis and ODEs · Mathematics 2025-07-01 Yury S. Barkovsky , Mikhail Tyaglov

Polynomial-in-time algorithms for computing classical Hurwitz numbers were given in [4] based on the Pandharipande equation. The paritition function of double Hurwitz numbers was proved [21] to satisfy the 2-Toda hierarchy. In this paper,…

Mathematical Physics · Physics 2026-04-30 Xiang Li

We give some results and conjectures about recurrence relations for certain sequences of binomial sums.

Combinatorics · Mathematics 2007-05-23 Johann Cigler

In this paper, we define the generalized r-Whitney numbers of the first and second kind. Moreover, we drive the generalized Whitney numbers of the first and second kind. The recurrence relations and the generating functions of these numbers…

Combinatorics · Mathematics 2018-07-09 B. S. El-Desouky , F. A. Shiha , Ethar M. Shokr

Properties of the Alexander polynomials of Hurwitz curves are investigated. A complete description of the set of the Alexander polynomials of irreducible Hurwitz curves in the terms of their roots is given.

Symplectic Geometry · Mathematics 2007-05-23 Vik. S. Kulikov

We study the Hurwitz-type analogue of Schur multiple zeta-functions involving shifting parameters. We extend various formulas, known for ordinary Schur multiple zeta-functions, to the case of Hurwitz type. We also mention unpublished…

Number Theory · Mathematics 2025-03-27 Kohji Matsumoto , Maki Nakasuji

We introduce a new generalization of Stirling numbers of the second kind and analyze their properties, including generating functions, integral representations, and recurrence relations. These numbers are used to approximate Riemann zeta…

Number Theory · Mathematics 2025-10-09 Kamel Mezlini , Tahar Moumni , Najib Ouled Azaiez