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$I_{\sigma}$-Convergence [PDF]

open access: yesMathematical Communications, 2011
In this paper, the concepts of $\sigma$-uniform density of subsets A of the set $\mathbb{N}$ of positive integers and corresponding $I_{\sigma}$-convergence were introduced. Furthermore, inclusion relations between $I_{\sigma}$-convergence and invariant convergence also $I_{\sigma}$-convergence and $[V_{\sigma}]_{p}$-convergence were given.
Ulusu, Uğur, Gök, Hafize, Nuray, Fatih
core   +4 more sources

A Study on the Convergence of Gradient Method with Momentum for Sigma-Pi-Sigma Neural Networks

open access: yesJournal of Applied Mathematics and Physics, 2018
In this paper, a gradient method with momentum for sigma-pi-sigma neural networks (SPSNN) is considered in order to accelerate the convergence of the learning procedure for the network weights. The momentum coefficient is chosen in an adaptive manner, and the corresponding weak convergence and strong convergence results are proved.
Xun Zhang, Naimin Zhang
exaly   +3 more sources

Impact of Logistics on Global Economic Growth: Beta and Sigma Convergence During the Period 2007–2022

open access: yesLogistics
Background: Logistics plays a key role in economic performance, yet its contribution to global growth and convergence remains underexplored. This study examines how different logistics dimensions have influenced GDP per worker across countries over the ...
Pablo Coto-Millán   +2 more
doaj   +3 more sources

Bulgarian NUTS2 Regions’ Beta- and Sigma- Convergence Towards the Eurozone

open access: yesEconomic Alternatives, 2022
In this scientific article Bulgarian regional economic convergence has been investigated in the 2000 – 2018 period. Beta- and sigma-convergence tests have been performed on Bulgarian regional data using level 2 Nomenclature of Territorial Units for ...

semanticscholar   +1 more source

Examining the Convergence of Human Development using Sigma Convergence Approach to Panel Data Analysis

open access: yesWseas Transactions on Business and Economics, 2022
A special autonomy policy was implemented in Aceh in 2006, which differed in managing fiscal transfers from the central government. To this end, we examined the convergence of human development in districts/cities for thirteen years (period 2008-2020) as
Irwan Safwadi   +3 more
semanticscholar   +1 more source

Regularly ideal invariant convergence of double sequences

open access: yesJournal of Inequalities and Applications, 2021
In this paper, we introduce the notions of regularly invariant convergence, regularly strongly invariant convergence, regularly p-strongly invariant convergence, regularly ( I σ , I 2 σ ) $(\mathcal{I}_{\sigma },\mathcal{I}^{\sigma }_{2})$ -convergence ...
Nimet Pancaroǧlu Akın
doaj   +1 more source

Economic Convergence in Sumatra Island: Stochastic Approach

open access: yesМодернизация, инновация, развитие, 2022
Purpose: convergence occurs when regions with poor economies tend to grow faster than regions with rich economies, so poorer regions tend to catch up with rich regions in terms of GRDP or per capita products.
. Kurniati, . Azwardi, . Sukanto
doaj   +1 more source

Common myths of six sigma demystified [PDF]

open access: yes, 2008
Purpose – Six Sigma has been part of our business lexicon for more than a decade. Debates on its emergence as a strategic initiative have created critics who consider it as an old wine in a new bottle. Is Six Sigma a management fad? This article presents
Kumar, Maneesh   +4 more
core   +4 more sources

On entire Dirichlet series similar to Hadamard compositions

open access: yesМатематичні Студії, 2023
A function $F(s)=\sum_{n=1}^{\infty}a_n\exp\{s\lambda_n\}$ with $0\le\lambda_n\uparrow+\infty$ is called the Hadamard composition of the genus $m\ge 1$ of functions $F_j(s)=\sum_{n=1}^{\infty}a_{n,j}\exp\{s\lambda_n\}$ if $a_n=P(a_{n,1},...,a_{n,p ...
O.M. Mulyava, M. M. Sheremeta
doaj   +1 more source

Parallel regional convergence in Poland before and after EU accession

open access: yesMiscellanea Geographica: Regional Studies on Development, 2021
The purpose of the study is to analyze the dynamics of regional disparities on NUTS 2 level in Poland for the period 1990–2017 within the framework of sigma convergence.
Wójcik Piotr
doaj   +1 more source

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