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We present a simple alternative viewpoint on Hodge-Newton indecomposability, illustrating its explanatory value through a uniform proof of a combinatorial identity arising from affine Deligne-Lusztig varieties with finite Coxeter part.

Number Theory · Mathematics 2026-03-10 Dong Gyu Lim

A. Lacasse conjectured a combinatorial identity in his study of learning theory. Various people found independent proofs. Here is another one that is based on the study of the tree function, with links to Lamberts $W$-function and…

Combinatorics · Mathematics 2013-01-17 Helmut Prodinger

In this note we formulate a conjecture about two group ring identities and prove that it would imply the Alon-Jaeger-Tarsi conjecture.

Combinatorics · Mathematics 2026-04-30 János Nagy , Péter Pál Pach

Recently Zagier proved a remarkable q-series identity. We show that this identity can also be proved by modifying Franklin's classical proof of Euler's pentagonal number theorem.

Number Theory · Mathematics 2007-05-23 Robin Chapman

We give a combinatorial identity related to the Franel numbers involving the sum of fourth power of binomial coefficients. Furthermore, investigating in J. Mikic's proof of the first Strehl Identity, we provide a combinatorial proof of this…

Combinatorics · Mathematics 2020-12-07 Hacene Belbachir , Yassine Otmani

Binomial coefficients and harmonic numbers are important in many branches of number theory. With the help of the operator method and several summation and transformation formulas for hypergeometric series, we prove eight conjectural series…

Combinatorics · Mathematics 2023-06-06 Chuanan Wei

Starting with an inclusion-exclusion proof of a combinatorial identity, a direct bijection can be produced using recursive subtraction (sometimes with a direct combinatorial description). We apply this method to identities for generalized…

Combinatorics · Mathematics 2024-10-31 Melanie Ferreri

We prove a curious identity for the Bernoulli numbers.

Number Theory · Mathematics 2013-08-16 Daniel B. Grunberg , Hao Pan , Zhi-Wei Sun

In this note, using the derangement polynomials and their umbral representation, we give another simple proof of an identity conjectured by Lacasse in the study of the PAC-Bayesian machine learning theory.

Combinatorics · Mathematics 2015-03-13 Yidong Sun

The authors of the title proved an elegant identity expressing a Toeplitz determinant in terms of the Fredholm determinant of an infinite matrix which (although not described as such) is the product of two Hankel matrices. The proof used…

Functional Analysis · Mathematics 2007-05-23 Estelle L. Basor , Harold Widom

Identities between Whittaker and modified Bessel functions are derived for particular complex orders. Certain polynomials appear in such identities, which satisfy a fourth order differential equation (not of hypergeometric type), and they…

Mathematical Physics · Physics 2007-05-23 James Lucietti

In the present paper combinatorial identities involving q-dual sequences or polynomials with coefficients q-dual sequences are derived. Further, combinatorial identities for q-binomial coefficients(Gaussian coefficients), q-Stirling numbers…

Combinatorics · Mathematics 2007-05-23 Sharon J. X. Hou , Jiang Zeng

We prove certain conjecture holds true for a finite category which has M\"obius inversion. The conjecture states a relationship between the zeta function of a finite category and the Euler characteristic of a finite category.

Category Theory · Mathematics 2012-06-07 Kazunori Noguchi

For non-negative integers $k\leq n$, we prove a combinatorial identity for the $p$-binomial coefficient $\binom{n}{k}_p$ based on abelian p-groups. A purely combinatorial proof of this identity is not known. While proving this identity, for…

Combinatorics · Mathematics 2021-03-30 C P Anil Kumar

In their recent book on combinatorial identities, Quaintance and Gould devoted one chapter to Melzak's identity. We give new proofs for this identity and its generalization.

Combinatorics · Mathematics 2016-03-24 Ulrich Abel , Henry W. Gould , Jocelyn Quaintance

In this note we give some identities which involve the Mertens function M(n). Our proofs are combinatorial with relatively prime subsets as a main tool.

Number Theory · Mathematics 2009-12-09 Mohamed El Bachraoui

We prove two polynomial identities which are particular cases of a conjecture arising in the theory of L-functions of twisted Carlitz modules. This conjecture is stated in earlier papers of the second author.

Algebraic Geometry · Mathematics 2017-07-17 Stefan Ehbauer , Dmitry Logachev , Márcia Sarraff de Nascimento

Recently, using modular forms F. Beukers posed a unified method that can deal with a large number of supercongruences involving binomial coefficients and Ap\'ery-like numbers. In this paper, we use Beukers' method to prove some conjectures…

Number Theory · Mathematics 2024-09-20 Zhi-Hong Sun , Dongxi Ye

The article provides a counterexample to a conjecture by Blocki-Zwonek.

Complex Variables · Mathematics 2015-07-20 John Erik Fornæss

In this paper we derive some interesting identities arising from the orhtogonality of gegenbauer polynomials.

Number Theory · Mathematics 2012-08-01 Dae San Kim , Taekyun Kim , Seog-Hoon Rim