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We give a combinatorial characterization of the identities holding in the semiring of all upper triangular Boolean $n\times n$-matrices and apply the characterization to computational complexity of identity checking, finite axiomatizability…

Group Theory · Mathematics 2025-10-08 Mikhail V. Volkov

We introduce a new four-parameters sequence that simultaneously generalizes some well-known integer sequences, including Fibonacci, Padovan, Jacobsthatl, Pell, and Lucas numbers. Combinatorial interpretations are discussed and many…

Number Theory · Mathematics 2017-05-16 Robson da Silva , Kelvin S. de Oliveira , Almir C. G. Neto

We prove a universal identity for powers of elements in quadratic algebras, expressing x^m in terms of x and the identity. As a consequence, we obtain a general formula for powers of 2x2 matrices depending only on trace and determinant.…

Combinatorics · Mathematics 2026-03-23 Marco Mantovanelli

We present a new and useful congruence identity satisfied by m-permutable varieties.

General Mathematics · Mathematics 2007-05-23 Paolo Lipparini

We present a differential-calculus-based method which allows one to derive more identities from {\it any} given Fibonacci-Lucas identity containing a finite number of terms and having at least one free index. The method has two {\it…

Number Theory · Mathematics 2023-12-06 Kunle Adegoke

Based on a variant of Sury's polynomial identity we derive new expressions for various finite Fibonacci (Lucas) sums. We extend the results to Fibonacci and Chebyshev polynomials, and also to Horadam sequences. In addition to deriving sum…

Number Theory · Mathematics 2023-12-06 Kunle Adegoke , Robert Frontczak

The relations between the Bernoulli and Eulerian polynomials of higher order and the complete Bell polynomials are found that lead to new identities for the Bernoulli and Eulerian polynomials and numbers of higher order. General form of…

Number Theory · Mathematics 2009-11-17 Boris Y. Rubinstein

This paper builds on the research initiated by Boyadzhiev, but introduces generalized harmonic numbers, \[ H_n(\alpha)= \sum_{k=1}^n \frac{\alpha^{k}}{k}, \] which enable the derivation of new identities as well as the reformulation of…

General Mathematics · Mathematics 2025-12-23 Roberto Sanchez Peregrino

In this paper, a class of combinatorial identities is proved. A method is used which is based on the following rule: counting elements of a given set in two ways and making equal the obtained results. This rule is known as "counting in two…

Discrete Mathematics · Computer Science 2009-02-09 Krassimir Yankov Iordjev , Dimiter Stoichkov Kovachev

We prove, in any positive characteristic, Parseval-Rayleigh identities for the residue map of a homogeneous complete intersection. As an application, we give a conceptual proof of the folklore fact that generic homogeneous complete…

Commutative Algebra · Mathematics 2025-11-10 Karim Alexander Adiprasito , Ryoshun Oba , Stavros Argyrios Papadakis , Vasiliki Petrotou

We present a different combinatorial interpretations of Lucas and Gibonacci numbers. Using these interpretations we prove several new identities, and simplify the proofs of several known identities. Some open problems are discussed towards…

Combinatorics · Mathematics 2020-08-12 Pankaj Jyoti Mahanta , Manjil P. Saikia

In this paper, we consider a generalization of Horadam sequence {w_n} which is defined by the recurrence w_n = aw_n-1 + cw_n-2; if n is even, w_n = bw_n-1 + cw_n-2; if n is odd with arbitrary initial conditions w_0, w_1 and nonzero real…

Number Theory · Mathematics 2019-03-04 Elif Tan , Ho-Hon Leung

An identity for binomial symbols modulo an odd positive integer $n$ relating to the least prime factor of $n$ is proved. The identity is discussed within the context of Pell conics.

Number Theory · Mathematics 2011-07-29 Samuel A. Hambleton

In this article, we will discover some new generalized identity regarding continued fractions. We will connect the results to Fibonacci numbers and Lucas numbers. For all the proof, we will use induction.

Number Theory · Mathematics 2019-07-31 Shaoxiong Yuan

A product difference equation is proved and used for derivation by elementary methods of four combinatorial identities, eight combinatorial identities involving generalized harmonic numbers and eight combinatorial identities involving…

Combinatorics · Mathematics 2017-01-13 M. J. Kronenburg

This paper describes a method to find a connection between combinatorial identities and hypergeometric series with a number of examples. Combinatorial identities can often be written as hypergeometric series with unit argument. In a number…

Combinatorics · Mathematics 2022-04-13 Enno Diekema

Starting from the characteristic polynomial for ordinary matrices we give a combinatorial deduction of the Mandelstam identities and viceversa, thus showing that the two sets of relations are equivalent. We are able to extend this…

High Energy Physics - Theory · Physics 2009-10-22 D. E. Berenstein , L. F. Urrutia

We give alternative proof of Melham's and Howard's identities on generalised Fibonacci numbers

Number Theory · Mathematics 2013-05-09 Cheng Lien Lang , Mong Lung Lang

Based on the work of A. Vershik, we introduce two new combinatorial identities. We show how these identities can be used to prove a new hook-content identity. The main motivation for deriving this identity was a particular optimization…

Combinatorics · Mathematics 2018-09-07 Michal Sedlák , Alessandro Bisio

We study and derive identities for the multi-variate independence polynomials from the perspective of heaps theory. Using the inversion formula and the combinatorics of partially commutative algebras we show how the multi-variate version of…

Combinatorics · Mathematics 2025-05-21 Deniz Kus , Kartik Singh , R. Venkatesh