Results 21 to 30 of about 71,665 (219)

Airborne sound insulation improvement on masonry partitions using additional plasterboard layers

open access: yesEngineering Structures and Technologies, 2011
For the purposes of accumulating knowledge of how to comply with requirements for new buildings of obligatory sound class C or enhanced acoustic comfort sound classes A and B (Lithuanian Building Technical regulations STR 2.01.07:2003), the article ...
Marius Mickaitis   +2 more
doaj   +1 more source

A new class of infinite products, and Euler's totient

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1994
We introduce some new infinite products, the simplest being(1−y)∏k=2∞∏j∈ϕk(1−ykqj)1/k=(1−y1−qy)1/(1−q),where ϕk is the set of positive integers less than and relatively prime to k, valid for |y|∧|qy| both less than unity, with q≠1.
Geoffrey B. Campbell
doaj   +1 more source

Real-world applications of number theory [PDF]

open access: yesریاضی و جامعه
The above abstract has been extracted by the translator from the original article (J. Klaška, Real-world applications of number theory, South Bohemia Mathematical Letters, 25 no.
Rahim Rahmati-Asghar
doaj   +1 more source

Arc Spaces and Rogers-Ramanujan Identities [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2011
Arc spaces have been introduced in algebraic geometry as a tool to study singularities but they show strong connections with combinatorics as well. Exploiting these relations we obtain a new approach to the classical Rogers-Ramanujan Identities.
Clemens Bruschek   +2 more
doaj   +1 more source

Classifiers, partitions, and measurements: Exploring the syntax and semantics of sortal classifiers

open access: yesGlossa, 2019
In many languages, measure terms like item and kilo, as in two items of furniture and two kilos of rice, can be used either to partition the nominal denotation into countable units, or to measure a denotation without inducing a partition. These two types
Alan Bale, Jessica Coon, Nicholás Arcos
doaj   +2 more sources

Congruences modulo $4$ for the number of $3$-regular partitions

open access: yesComptes Rendus. Mathématique, 2023
The last decade has seen an abundance of congruences for $b_\ell (n)$, the number of $\ell $-regular partitions of $n$. Notably absent are congruences modulo $4$ for $b_3(n)$. In this paper, we introduce Ramanujan type congruences modulo $4$ for $b_3(2n)$
Ballantine, Cristina, Merca, Mircea
doaj   +1 more source

Integrality of hook ratios [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2012
We study integral ratios of hook products of quotient partitions. This question is motivated by an analogous question in number theory concerning integral factorial ratios. We prove an analogue of a theorem of Landau that already applied in the factorial
Paul-Olivier Dehaye
doaj   +1 more source

On Andrews’ Partitions with Parts Separated by Parity

open access: yesMathematics, 2021
In this paper, we present a generalization of one of the theorems in Partitions with parts separated by parity introduced by George E. Andrews, and give its bijective proof.
Abdulaziz M. Alanazi, Darlison Nyirenda
doaj   +1 more source

Harada's conjecture II for the finite general linear groups and unitary groups [PDF]

open access: yesInternational Journal of Group Theory
K. Harada conjectured for any finite group $G$, the product of sizes of all conjugacy classes is divisible by the product of degrees of all irreducible characters. We study this conjecture when $G$ is the general linear group over a finite field. We show
Masahiro Sugimoto
doaj   +1 more source

An extension to overpartitions of Rogers-Ramanujan identities for even moduli [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2006
We investigate class of well-poised basic hypergeometric series $\tilde{J}_{k,i}(a;x;q)$, interpreting these series as generating functions for overpartitions defined by multiplicity conditions.
Sylvie Corteel   +2 more
doaj   +1 more source

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