Quaestiones Mathematicae
1727-933X (Online)
0.8 (2024) Impact Factor
0.7 (2024) 5-year IF
1.4 (2024) CiteScore
Accredited with the DHET (SAPSE)
Latest Issue
Volume 48, Issue 8, 2025
Research Article
The Common Hermitian Solutions of the matrix equations
B
2
X
B
2
*
=
A
2
and
B
3
X
B
3
*
=
A
3
subject to inequality restrictions
Functionally countable subspaces of nice products
On the preservers of some subsets of the approximate point spectrum
Probabilistic bivariate Bell polynomials
Effective descent morphisms of ordered families
A note on the construction of non-spatial frames
Aims & Scope
Quaestiones Mathematicae publishes research papers from a wide range of mathematical topics which will often reflect the current mathematical research interests in South Africa; but submissions in English from anywhere in the world are welcome. Acceptance of a paper is normally determined by two independent favourable referees reports. Longer survey papers of exceptional quality are also considered from time to time.
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1976 - current Published as Quaestiones Mathematicae
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1975 - 1975
Editors
Editor-in-Chief
S TER HORST
Research Focus Area: Pure and Applied Analytics, North-West University, Potchefstroom, South Africa
e-mail: sanne.terhorst@nwu.ac.za
Associate Editors
J BANASIAK
Department of Mathematics and Applied Mathematics, University of Pretoria, Hatfield, South Africa
e-mail: jacek.banasiak@up.ac.za
D HOLGATE
Department of Mathematics and Applied Mathematics, University of the Western Cape, Bellville, South Africa
e-mail: dholgate@uwc.ac.za
G JANELIDZE
Department of Mathematics and Applied Mathematics, University of Cape Town, Rondebosch, South Africa
e-mail: george.janelidze@uct.ac.za
JG RAFTERY
Department of Mathematics and Applied Mathematics, University of Pretoria, Hatfield, South Africa
e-mail: james.raftery@up.ac.za
IM REWITZKY
Department of Mathematical Sciences, Stellenbosch University, Stellenbosch, South Africa
e-mail: rewitzky@sun.ac.za
BA WATSON
School of Mathematics, University of the Witwatersrand, Johannesburg, South Africa
e-mail: bruce.watson@wits.ac.za
L VAN WYK
Department of Mathematical Sciences, Stellenbosch University, Stellenbosch, South Africa
e-mail: Ivw@sun.ac.za
Honorary and Advisory Board
T DUBE, University of South Africa, South Africa
B GREEN, African Institute for Mathematical Sciences, South Africa
K GROBLER, North-West University, South Africa
N SAUER, University of Pretoria, South Africa
Submissions
All submissions should be made online at the Taylor & Francis Submissions Portal (https://rp.tandfonline.com/submission/create?journalCode=TQMA).
Editorial Board
M Ali, University of Witwatersrand, South Africa
PA Bergh, Norwegian University of Science and Technology, Norway
O Blasco, Universitat de Valencia, Spain
S Bradlow, University of Illinois at Urbana-Champaign, USA
F Breuer, University of Newcastle, Australia
R Brits, University of Johannesburg, South Africa
MM Clementino, University of Coimbra, Portugal
DS Cvetković-Ilić, University of Nis, Serbia
E Czabarka, University of South Carolina, USA
V Drensky, Bulgarian Academy of Sciences, Bulgaria
M Domokos, Alfred Renyi Institute of Mathematics, Hungary
V Futorny, University of Sao Paulo, Brazil
M Galewski, Institute of Mathematics, Lodz University of Technology, Poland
K Govinder, University of KwaZulu-Natal, South Africa
M Gran, Université Catholique de Louvain, Belgium
M Henning, University of Johannesburg, South Africa
C Heuberger, Alpen-Adria-Universität Klagenfurt, Austria
M Langer, University of Strathclyde, Scotland, UK
J Lynd, University of Louisiana, USA
F Luca, Stellenbosch University, South Africa
M Möller, University of Witwatersrand, South Africa
J Picado, University of Coimbra, Portugal
J Ratzkin, University of Würzburg, Germany
A Rhandi, University of Salerno, Italy
FG Russo, University of Camerino, Italy
J Sarkar, Indian Statistical Institute, India
S Schroll, University of Leicester, United Kingdom
V Troitsky, University of Alberta, Canada
JH van der Walt, University of Pretoria, South Africa
S Wagner, Uppsala University, Sweden
Publishing Manager
Contact regarding all aspects relating to the production of the journal, including scheduling and copyright issues:
Dr. Kelly-Anne Frith
NISC (Pty) Ltd
4 Speke Street
PO Box 377
Makhanda 6140
South Africa
Tel: +27 (0)46 622 9698
Fax: +27 (0)46 622 9550
e-mail: publishing@nisc.co.za
Published in association with the South African Mathematical Society.
Instructions for Authors
Instructions for Authors
Submission of Manuscripts – All submissions should be made online at the Taylor & Francis Submissions Portal. New users should first create an account. Manuscripts should be submitted in PDF format together with the associated LaTeX source and graphics files.
Editorial Policy – No manuscript that has been previously published, or is being considered for publication elsewhere, should be submitted to Quaestiones Mathematicae. In keeping with international best practice in scholarly publishing, the publishers of Quaestiones Mathematicae routinely check all manuscripts for unacknowledged content. Therefore, it is requested that authors ensure that the manuscript is comprehensively referenced, even when reusing their own previously published descriptions. Contributions must conform to the principles outlined in Ethical considerations in research publication available for download below.
Preparation of Manuscripts – Manuscripts will be typeset in LaTeX using the amsmath package of the American Mathematical Society. The manuscript should include:
1. Title, with a shortened running title if necessary.
2. Author’s name: First name(s) or initials, surname.
3. Abstract of at most 20 lines.
4. 2020 Mathematics Subject Classification.
5. Key words and phrases.
6. References in the style of Mathematical Reviews.
7. Author’s full postal address, including e-mail.
Authors who are not proficient in English are encouraged to send their manuscripts for language editing before submission as poor grammar may prejudice review and lead to immediate rejection.
Reprints – All reprints are distributed electronically in PDF format and authors will be notified by the publisher when reprints are available for download.
Open access – Quaestiones Mathematicae is a hybrid journal which allows authors the option of publishing their article Open Access for a set fee. Further details are given in NISCoa: Publishing an Open Access Article with NISC available from www.nisc.co.za/journals.