Impact Factor: 2.0

Open Access Published since March 7, 2014

Demonstratio Mathematica

ISSN: 2391-4661

Editor-in-chief: Calogero Vetro

About this journal

Demonstratio Mathematica is a fully peer-reviewed, open access, electronic journal devoted to functional analysis, approximation theory and related topics. The journal presents a forum where all aspects of these problems can be discussed. The journal provides the readers with free, instant, and permanent access to all content worldwide; and the authors with extensive promotion of published articles, long-term preservation, no space constraints and quick online publication.

Demonstratio Mathematica is listed inter alia by Web of Science (ESCI), SCOPUS, MathSciNet and zbMATH. Our standard policy requires each paper to be reviewed by at least two Referees and the peer-review process is single-blind.

The potential topics include (but are not limited to):

Approximation theory and iteration methods
Fixed point theory and methods of computing fixed points
Functional, ordinary and partial differential equations
Nonsmooth analysis, variational analysis and convex analysis
Optimization theory, variational inequalities and complementarity problems

For more detailed list of the potential topics please refer to Instruction for Authors.

The journal considers submissions of different types of articles. "Research Articles" are focused on fundamental theoretical aspects, as well as on significant applications in science, engineering etc. “Communications” are intended to present information of exceptional novelty and exciting results of significant interest to the readers. “Review articles” and “Commentaries”, which present the existing literature on the specific topic from new perspectives, are welcome as well.

Demonstratio Mathematica is subject to an Article Processing Charge (APC). There are no submission charges – Article Processing Charges apply after the acceptance of a manuscript. Authors, who have limited access to funds, may request for a discount. Inquiries concerning APCs should be addressed before or immediately after submission of a paper to the Editorial Office (demonstratio.editorial@degruyter.com). For more details please refer to Article Processing Charges document (in PDF).

Special / Topical Issues:

Development of Fuzzy Sets and Their Extensions
GUEST EDITORS: Željko Stević (University of East Sarajevo, Bosnia and Herzegovina), Yiming Tang (Hefei University of Technology, China), Lei Liu (Liaoning University of Technology, China), Muhammad Gulzar (University of Education Lahore, Pakistan)
DEADLINE FOR SUBMISSIONS: October 16, 2023
2nd International E-Conference on Mathematical and Statistical Sciences: A Selcuk Meeting
GUEST EDITOR: Tuncer Acar (Selçuk University, Turkey)
DEADLINE FOR SUBMISSIONS: August 31, 2023
Recent Developments in Fixed-Point Theory and Applications
GUEST EDITORS: Santosh Kumar (University of Dar es Salaam, Tanzania), Anita Tomar (Sri Dev Suman Uttarakhand University, India), Cristian Chifu (Babes-Bolyai University, Romania), Mohammad Mursaleen (Aligarh Muslim University, India)
DEADLINE FOR SUBMISSIONS: October 10, 2023
On some integral inequalities, integral equations and applications
GUEST EDITORS: Ahmet O. Akdemir (Ağrı İbrahim Çeçen University, Turkey), Maria Alessandra Ragusa (University of Catania, Italy), Nguyen Huy Tuan (Van Lang University, Vietnam)
DEADLINE FOR SUBMISSIONS: October 15, 2023
Nonlinear Evolution Equations and Their Applications
GUEST EDITORS: Praveen Agarwal (Anand International College of Engineering, India), Dumitru Baleanu (Department of Mathematics, Cankaya University, Turkey), Necati Ozdemir (Balikesir University, Turkey), Mohamed S. Osman (Department of Mathematics, Faculty of Science, Cairo University, Egypt)
DEADLINE FOR SUBMISSIONS: August 15, 2023
Mathematics for Artificial intelligence and Artificial intelligence for Mathematics
GUEST EDITORS: Hadi Jahanshahi (University of Manitoba, Canada), Oscar Castillo (Tijuana Institute of Technology, Mexico)
DEADLINE FOR SUBMISSIONS: October 2, 2023
Computational and Numerical Methods for Special Functions
GUEST EDITORS: Serkan Araci (Hasan Kalyoncu University, Turkey), Martin Bohner (Missouri University of Science and Technology, USA), Guotao Wang (Shanxi Normal University, China)
DEADLINE FOR SUBMISSIONS: March 31, 2023.

Your Benefits

Why read
Demonstratio Mathematica has been published since 1969, from the year 1972 in English and other languages (since 1995 exclusively in English). Until the end of the year 2016 it was published by the Faculty of Mathematics and Information Science of Warsaw University ofTechnology, as The Journal of Warsaw Technical University.

Since 2017 the journal publishes original research exclusively on topics related to functional analysis and approximation theory. Submissions related to other areas of mathematical research will no longer be accepted by the journal.

Thanks to Open Access all articles (starting from the year 1969) are freely available to the academic community worldwide.

Why submit
Authors benefit from:

constructive peer-review
no space constraints
quick online publication of accepted papers*
Open Access for all articles**
promotion of published papers to readers and citers
long-term preservation of the content***

* The journal uses continuous publication model - accepted manuscripts are published quickly after the acceptance.
** Thanks to Open Access, all articles are freely available to the academic community worldwide without any restrictions, there are more liberal policies on copyrights (authors retain copyright) and on self-archiving (no embargo periods).
*** The journal is archived in Portico.

Detailed information on Editorial Policy, Publication Ethics, Instructions for Authors etc. can be found in the Supplementary Materials section (see below).

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Supplementary Materials

Topics

External Links

Volume 56 Issue 1

January 2023

In this article, we study the regularity criteria of the weak solutions to the Boussinesq equations involving the horizontal component of velocity or the horizontal derivatives of the two components of velocity in anisotropic Lorentz spaces. This result reveals that the velocity field plays a dominant role in regularity theory of the Boussinesq equations.

In this article, we introduce and study the notion of split generalized equilibrium problem with multiple output sets (SGEPMOS). We propose a new iterative method that employs viscosity approximation technique for approximating the common solution of the SGEPMOS and common fixed point problem for an infinite family of multivalued demicontractive mappings in real Hilbert spaces. Under mild conditions, we prove a strong convergence theorem for the proposed method. Our method uses self-adaptive step size that does not require prior knowledge of the operator norm. The results presented in this article unify, complement, and extend several existing recent results in the literature.

In this article, we consider compositions of positive integers with 2 s and 3 s . We see that these compositions lead us to results that involve Padovan numbers, and we give some tiling models of these compositions. Moreover, we examine some tiling models of the compositions related to the Padovan polynomials and prove some identities using the tiling model’s method. Next, we obtain various identities of the compositions of positive integers with 2 s and 3 s related to the Padovan numbers. The number of palindromic compositions of this type is determined, and some numerical arithmetic functions are defined. Finally, we provide a table that compares all of the results obtained from compositions of positive integers with 2 s and 3 s .

The primary goal of this research is to investigate the approximate numerical solution of variational inequalities using quasimonotone operators in infinite-dimensional real Hilbert spaces. In this study, the sequence obtained by the proposed iterative technique for solving quasimonotone variational inequalities converges strongly toward a solution due to the viscosity-type iterative scheme. Furthermore, a new technique is proposed that uses an inertial mechanism to obtain strong convergence iteratively without the requirement for a hybrid version. The fundamental benefit of the suggested iterative strategy is that it substitutes a monotone and non-monotone step size rule based on mapping (operator) information for its Lipschitz constant or another line search method. This article also provides a numerical example to demonstrate how each method works.

In this article, we have established some new bounds of Fejér-type Hermite-Hadamard inequality for k k -fractional integrals involving r r -times differentiable preinvex functions. It is noteworthy that in the past, there was no weighted version of the left and right sides of the Hermite-Hadamard inequality for k k -fractional integrals for generalized convex functions available in the literature.

In this article, we explain how a recent Lyapunov theorem on stability plays a role in the study of the strong stabilizability problem in Hilbert spaces. We explore a degenerate controlled system and investigate the properties of a feedback control to stabilize such system in depth. The spectral theory of an appropriate pencil operator is used to generate robustness constraints for a stabilizing control.

Volume 46 (2013)

Volume 45 (2012)

Volume 44 (2011)

Volume 43 (2010)

Volume 42 (2009)

Volume 41 (2008)

Volume 40 (2007)

Volume 39 (2006)

Volume 38 (2005)

Volume 37 (2004)

Volume 36 (2003)

Volume 35 (2002)

Volume 34 (2001)

Volume 33 (2000)

Volume 32 (1999)

Volume 31 (1998)

Volume 30 (1997)

Volume 29 (1996)

Volume 28 (1995)

Volume 27 (1994)

Volume 26 (1993)

Volume 25 (1992)

Volume 24 (1991)

Volume 23 (1990)

Volume 22 (1989)

Volume 21 (1988)

Volume 20 (1987)

Volume 19 (1986)

Volume 18 (1985)

Volume 17 (1984)

Volume 16 (1983)

Volume 15 (1982)

Volume 14 (1981)

Volume 13 (1980)

Issue 4

Volume 12 (1979)

Volume 11 (1978)

Volume 10 (1977)

Volume 9 (1976)

Volume 8 (1975)

Volume 7 (1974)

Volume 5 (1973)

Volume 4 (1972)

Volume 3 (1971)

Volume 2 (1970)

Volume 1 (1969)

Journal Impact Factor	2.0	2022, Journal Citation Reports (Clarivate, 2023)
5-year Journal Impact Factor	1.4	2022, Journal Citation Reports (Clarivate, 2023)
Journal Citation Indicator	1.62	2022, Journal Citation Reports (Clarivate, 2023)
CiteScore	2.7	2022, Scopus (Elsevier B.V., 2023)
SCImago Journal Rank	0.478	2022, SJR (Scimago Lab, 2023; Data Source: Scopus)
Source Normalized Impact per Paper	1.195	2022, CWTS Journal Indicators (CWTS B.V., 2023; Data Source: Scopus)
Mathematical Citation Quotient	0.45
Index Copernicus Value	130.21

More information about journal rankings

Submit

MANUSCRIPTS
Demonstratio Mathematica encourages the submission of substantial full-length bodies of work. There are no specific length restrictions for the overall manuscript or individual sections; however, we urge the authors to present and discuss their findings in a concise and accessible manner.

Manuscripts should be submitted to the journal via online submission system Editorial Manager available for this journal at http://www.editorialmanager.com/dema. In case of problems, please contact the Editorial Office of this journal at demonstratio.editorial@degruyter.com.

Manuscripts have to be written in LATEX, AMS-TEX, AMS-LATEX. We do not accept papers in Plain TEX format. For an initial submission, the authors are strongly advised to upload their entire manuscript, including tables and figures, as a single PDF file. Authors are strongly advised to submit the final version of the paper using the journal’s LATEX template.
For detailed information, please see Instruction for Authors.

EDITORIAL POLICY
Unpublished material: Submission of a manuscript implies that the work described is not copyrighted, published or submitted elsewhere, except in abstract form. The corresponding author should ensure that all authors approve the manuscript before its submission.
Ethical conduct of research: The authors must describe and confirm safeguards to meet ethical standards when applicable. See Editorial Policy for details.
Conflict of interest: When authors submit a manuscript, they are responsible for recognizing and disclosing financial and/or other conflicts of interest that might bias their work and/or could inappropriately influence his/her judgment. If no specified acknowledgement is given, the Editors assume that no conflict of interest exists. Authors are encouraged to fill in the ICMJE Conflicts of Interest Form (available here) and send it in the electronic format to the Managing Editor.
Copyright: All authors retain copyright, unless – due to their local circumstances – their work is not copyrighted. The copyrights are governed by the Creative-Commons Attribution Only license (CC-BY) which is compliant with Plan‑S. The corresponding author grants the journal license for use of the article, by signing the License to Publish. Scanned copy of license should be sent to the journal, as soon as possible.
Authorship: Authorship should be limited to those who have made a significant contribution to the conception, design, execution, or interpretation of the reported study. All those who have made significant contributions should be listed as co-authors. Where there are others who have participated in certain substantive aspects of the research project, they should be named in an Acknowledgement section. The corresponding author should ensure that all appropriate co-authors (according to the above definition) and no inappropriate co-authors are included in the author list of the manuscript, and that all co-authors have seen and approved the final version of the paper and have agreed to its submission for publication.
Peer Review process: Our standard policy requires each paper to be reviewed by at least two Referees and the peer-review process is single-blind. The Editors reserve the right to decline the submitted manuscript without review, if the studies reported are not sufficiently novel or important to merit publication in the journal. Manuscripts deemed unsuitable (insufficient originality or of limited interest to the target audience) are returned to the author(s) without review. The Editor seeks advice from experts in the appropriate field. Research articles and communications are refereed by a minimum of two reviewers, review papers by at least three. Authors are requested to suggest persons competent to review their manuscript. However, please note that this will be treated only as a suggestion, and the final selection of reviewers is exclusively the Editor's decision. The final decision of acceptance is made by Managing Editor or, in case of conflict, by the Editor-in-Chief.
Scientific Misconduct: This journal publishes only original manuscripts that are not also published or going to be published elsewhere. Multiple submissions/publications, or redundant publications (re-packaging in different words of data already published by the same authors) will be rejected. If they are detected only after publication, the journal reserves the right to publish a Retraction Note. In each particular case Editors will follow COPE’s Core Practices and implement the advices.

Editorial

Editor-in-Chief
Calogero Vetro, University of Palermo, Italy

Editorial Advisory Board
George Anastassiou, University of Memphis, USA
Marlene Frigon, University of Montréal, Canada
Doron Lubinsky, Georgia Institute of Technology, USA
Gradimir V. Milovanovic, Serbian Academy of Sciences and Arts, Serbia
Dumitru Motreanu, University of Perpignan, France
Donal O'Regan, National University of Ireland, Galway, Ireland
Tohru Ozawa, Waseda University, Japan
Tao Qian, University of Macau, China
Vicentiu Radulescu, AGH University of Science and Technology, Poland
Themistocles M. Rassias, National Technical University of Athens, Greece
Simeon Reich, Technion - Israel Institute of Technology, Israel
Bessem Samet, King Saud University, Saudi Arabia
Hari Mohan Srivastava, University of Victoria, Canada

Editorial Board
Tuncer Acar, Selcuk University, Turkey
Pietro Aiena, University of Palermo, Italy
Francesco Altomare, University of Bari, Italy
Esteban Andruchow, National University of General Sarmiento, Argentina
Ali Aral, Kirikkale University, Turkey
Dariusz Bugajewski, Adam Mickiewicz University, Poznań, Poland
Oktay Duman, TOBB University of Economics and Technology, Turkey
Hemen Dutta, University of Gauhati, India
Giovany Figueiredo, Universidade de Brasília, Brasil
Xian-Ming Gu, Southwestern University of Finance and Economics, China
Antonio Iannizzotto, University of Cagliari, Italy
Zenon Jabłoński, Jagiellonian University, Poland
Chao Ji, East China University of Science and Technology, China
Anna Kaminska, University of Memphis, USA
Wiesław Krawcewicz, University of Texas at Dallas, USA
Alberto Lastra, University of Alcalá, Spain
Alexander Lomtatidze, Brno University of Technology, Czech Republic
Giuseppe Marino, University of Calabria, Italy
Salah Mahmoud Boulaaras, Department of Mathematics, College of Sciences and Arts in ArRass, Qassim University, Saudi Arabia
Vladimir Müller, Academy of Sciences of the Czech Republic, Czech Republic
Dorian Popa, Technical University of Cluj-Napoca, Romania
Ioan Rasa, Technical University of Cluj-Napoca, Romania
Dušan D. Repovš, University of Ljubljana, Slovenia
Enrique A. Sánchez-Pérez, Technical University of Valencia, Spain
Wasfi Shatanawi, Hashemite University, Zarqa, Jordan
Plamen Simeonov, University of Houston-Downtown, USA
Tomonari Suzuki, Kyushu Institute of Technology, Japan
Sergey Tikhonov, ICREA, Centre De Recerca Matemàtica and UAB, Barcelona, Spain
Gianluca Vinti, University of Perugia, Italy
Dariusz Wardowski, University of Lodz, Poland
Eric Weber, Iowa State University, USA
Patrick Winkert, Technische Universität Berlin, Germany
Minbo Yang, Zhejiang Normal University, China.
Xiao-Jun Yang, China University of Mining and Technology, China
Shengda Zeng, Yulin Normal University, China
Bentuo Zheng, University of Memphis, USA
Jiabin Zuo, Guangzhou University, China

Assistant Editors
Piotr Kasprzak, Adam Mickiewicz University, Poland

Language Editors
John Evans, University of Coventry, UK
Katerina Hristova, University of East Anglia, UK

Publisher
DE GRUYTER Poland
Bogumila Zuga 32A Str.
01-811 Warsaw, Poland
T: +48 22 701 50 15

Editorial Contact
Kumaran Rengaswamy
Assistant Managing Editor, Compuscript
AssistantManagingEditor@degruyter.com

Managing Editor
Monika Maleszka
Monika Maleszka@degruyter.com

(Deutsch)

Type: Journal
Language: English
Publisher: De Gruyter Open Access
First published: March 7, 2014
Publication Frequency: 1 Issue per Year
Audience: Scientists, graduate students, and experts in mathematics.

Demonstratio Mathematica

A novel class of bipolar soft separation axioms concerning crisp points

Abstract

Duality for convolution on subclasses of analytic functions and weighted integral operators

Abstract

Existence of a solution to an infinite system of weighted fractional integral equations of a function with respect to another function via a measure of noncompactness

Abstract

On the existence of nonnegative radial solutions for Dirichlet exterior problems on the Heisenberg group

Abstract

Hyers-Ulam stability of isometries on bounded domains-II

Abstract

Asymptotic study of Leray solution of 3D-Navier-Stokes equations with exponential damping

Abstract

Semi-Hyers-Ulam-Rassias stability for an integro-differential equation of order 𝓃

Abstract

Jordan triple (α,β)-higher ∗-derivations on semiprime rings

Abstract

The asymptotic behaviors of solutions for higher-order (m1, m2)-coupled Kirchhoff models with nonlinear strong damping

Abstract

Approximation of the image of the Lp ball under Hilbert-Schmidt integral operator

Abstract

Best proximity points in ℱ-metric spaces with applications

Abstract

Approximation spaces inspired by subset rough neighborhoods with applications

Abstract

A numerical Haar wavelet-finite difference hybrid method and its convergence for nonlinear hyperbolic partial differential equation

Abstract

A novel conservative numerical approximation scheme for the Rosenau-Kawahara equation

Abstract

Fekete-Szegö functional for a class of non-Bazilevic functions related to quasi-subordination

Abstract

On local fractional integral inequalities via generalized ( h ˜ 1 , h ˜ 2 ) -preinvexity involving local fractional integral operators with Mittag-Leffler kernel

Abstract

On some geometric results for generalized k-Bessel functions

Abstract

Convergence analysis of M-iteration for 𝒢-nonexpansive mappings with directed graphs applicable in image deblurring and signal recovering problems

Abstract

Some results of homogeneous expansions for a class of biholomorphic mappings defined on a Reinhardt domain in ℂn

Abstract

Graded weakly 1-absorbing primary ideals

Abstract

The existence and uniqueness of solutions to a functional equation arising in psychological learning theory

Abstract

Some aspects of the n-ary orthogonal and b(αn,βn)-best approximations of b(αn,βn)-hypermetric spaces over Banach algebras

Abstract

Increasing property and logarithmic convexity of functions involving Dirichlet lambda function

Abstract

Global optimum solutions for a system of (k, ψ)-Hilfer fractional differential equations: Best proximity point approach

Abstract

The study of solutions for several systems of PDDEs with two complex variables

Abstract

Regularity criteria via horizontal component of velocity for the Boussinesq equations in anisotropic Lorentz spaces

Abstract

On Cauchy problem for pseudo-parabolic equation with Caputo-Fabrizio operator

Abstract

Fixed-point results for convex orbital operators

Abstract

Asymptotic stability of equilibria for difference equations via fixed points of enriched Prešić operators

Abstract

Asymptotic behavior of resolvents of equilibrium problems on complete geodesic spaces

Abstract

A system of additive functional equations in complex Banach algebras

Abstract

New inertial forward–backward algorithm for convex minimization with applications

Abstract

Uniqueness of solutions for a ψ-Hilfer fractional integral boundary value problem with the p-Laplacian operator

Abstract

Analysis of Cauchy problem with fractal-fractional differential operators

Abstract

Common best proximity points for a pair of mappings with certain dominating property

Abstract

Investigation of hybrid fractional q-integro-difference equations supplemented with nonlocal q-integral boundary conditions

Abstract

The structure of fuzzy fractals generated by an orbital fuzzy iterated function system

Abstract

On the structure of self-affine Jordan arcs in ℝ2

Abstract

Solvability for a system of Hadamard-type hybrid fractional differential inclusions

Abstract

Three solutions for discrete anisotropic Kirchhoff-type problems

The asymptotic behaviors of solutions for higher-order (m₁, m₂)-coupled Kirchhoff models with nonlinear strong damping

Approximation of the image of the L_p ball under Hilbert-Schmidt integral operator

Some results of homogeneous expansions for a class of biholomorphic mappings defined on a Reinhardt domain in ℂⁿ

Some aspects of the n-ary orthogonal and b_{(α_n,β_n)}-best approximations of b_{(α_n,β_n)}-hypermetric spaces over Banach algebras

On the structure of self-affine Jordan arcs in ℝ²