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We construct an infinite family of real cyclotomic fields with non-trivial class group. This result generalizes the result in [1] in the sense that our family includes theirs.

Number Theory · Mathematics 2022-05-17 Om Prakash

We study the Schwarz lemma for harmonic functions and prove sharp versions for the cases of real harmonic functions and the norm of harmonic mappings.

Complex Variables · Mathematics 2012-02-21 David Kalaj , Matti Vuorinen

We compute the class of the classifying stack of the special orthogonal group in the Grothendieck ring of stacks, and check that it is equal to the multiplicative inverse of the class of the group.

Algebraic Geometry · Mathematics 2017-07-07 Mattia Talpo , Angelo Vistoli

Recently we introduced a new class of relations for Bernoulli symmetric polynomials. This manuscript shows that these relations are valid for arbitrary homogeneous symmetric polynomial. Analysis of these relations leads to the discovery of…

Number Theory · Mathematics 2025-12-24 Boris Y. Rubinstein

We construct the generating function for products of inverse central binomial coefficients with harmonic numbers.

Combinatorics · Mathematics 2021-03-03 Khristo N. Boyadzhiev

In this paper, we mainly show that generalized hyperharmonic number sums with reciprocal binomial coefficients can be expressed in terms of classical (alternating) Euler sums, zeta values and generalized (alternating) harmonic numbers.

Number Theory · Mathematics 2021-04-12 Rusen Li

In this paper, we introduce formal sine functions whose coefficients are elements of a generalized harmonic algebra and investigate their properties corresponding to the classical addition formula and Pythagorean theorem. By taking their…

Number Theory · Mathematics 2025-06-18 Hanamichi Kawamura

We give simple upper bounds for rational sectional category and use them to compute invariants of the type of Farber's topological complexity of rational spaces. In particular we show that the sectional category of formal morphisms reaches…

Algebraic Topology · Mathematics 2015-03-10 J. G. Carrasquel-Vera

We present a relationship between the generalized hyperharmonic numbers and the poly-Bernoulli polynomials, motivated from the connections between harmonic and Bernoulli numbers. This relationship yields numerous identities for the…

Number Theory · Mathematics 2021-05-11 Levent Kargın , Mehmet Cenkci , Ayhan Dil , Mümün Can

Recently, the degenerate harmonic and the degenerate hyperharmonic numbers are introduced respectively as degenerate versions of the harmonic and the hyperharmonic numbers. The aim of this paper is to introduce the degenerate…

Number Theory · Mathematics 2023-06-22 Dae San Kim , Taekyun Kim

We introduce two classes of homogeneous polynomials and show their role in constructing of integrable hierarchies for some integrable lattices.

Exactly Solvable and Integrable Systems · Physics 2014-06-05 Andrei K. Svinin

In a rather straightforward manner, we develop the well-known formula for the Stirling numbers of the first kind in terms of the (exponential) complete Bell polynomials where the arguments include the generalised harmonic numbers. We also…

Classical Analysis and ODEs · Mathematics 2010-02-06 Donal F. Connon

In this paper we investigate congruence relationships of particular finite generalized harmonic numbers sums. We suggest more transparent and simpler method to analyse these sums and present several additional results for certain special…

Number Theory · Mathematics 2020-12-01 Aidas Medžiūnas

We investigate compositions of a positive integer with a fixed number of parts, when there are several types of each natural number. These compositions produce new relationships among binomial coefficients, Catalan numbers, and numbers of…

Combinatorics · Mathematics 2010-12-20 Milan Janjic

We study the class of those linear relations that can be factorized as products of idempotent relations. We provide several characterizations of this class, extending known factorization results for operators to the more general setting of…

Functional Analysis · Mathematics 2025-06-13 M. Laura Arias , Maximiliano Contino , Stefania Marcantognini

We present several sequences involving harmonic numbers and the central binomial coefficients. The calculational technique is consists of a special summation method that allows, based on proper two-valued integer functions, to calculate…

Number Theory · Mathematics 2020-06-24 J. Braun , D. Romberger , H. J. Bentz

In this paper, we evaluate in closed form several different series involving the harmonic numbers and skew-harmonic numbers. We consider two classes of series involving these sequences. One class of series involves the product of the $n$th…

Classical Analysis and ODEs · Mathematics 2025-10-20 Vincent Nguyen

In this work, by using Pauli matrices, we introduce four families of polynomials indexed over the positive integers. These polynomials have rational or imaginary rational coefficients. It turns out that two of these families are closely…

Algebraic Geometry · Mathematics 2016-08-22 Ayberk Zeytin

A finite number of rational functions are compatible if they satisfy the compatibility conditions of a first-order linear functional system involving differential, shift and q-shift operators. We present a theorem that describes the…

Symbolic Computation · Computer Science 2013-01-24 Shaoshi Chen , Ruyong Feng , Guofeng Fu , Ziming Li

Any homogeneous harmonic polynomial can be decomposed as a sum of powers of isotropic linear forms, that is, linear forms whose coefficients are the coordinates of isotropic points. The minimum size of such decompositions for a harmonic…

Algebraic Geometry · Mathematics 2025-12-08 S. Canino , C. Flavi