Abstract

Dear Readers,

We wish all of you a happy and successful year 2023.

The issue you are looking at presents our journal in a new layout, the new standardised journal design used by our publisher Wiley-VCH Verlag. Apart from the major changes on the title page of articles, most of the features of the layout of the journal Mathematical Logic Quarterly (MLQ) were retained.

But the appearance of the papers is not the only major change at MLQ. After having served for a dozen years as one of the Managing Editors of MLQ, Benedikt Löwe has decided to step down at the end of 2022. In 2011, the journal underwent some significant changes as it started to be published under the auspices of the Deutsche Vereinigung für Mathematische Logik und für Grundlagenforschung der Exakten Wissenschaften (DVMLG). Benedikt served as vice president (until 2012) and later as president of the DVMLG (2012–2022) and directed this transition forcefully.

In addition to being one of the Managing Editors, Benedikt served as the liaison between the DVMLG, the Editorial Office, the publisher, and the typesetters; he worked closely with our past Editorial Assistants, Peter van Ormondt and Hugo Nobrega, as well as our current Editorial Manager, Thomas Piecha. Benedikt's clear and pronounced ideas about scientific publishing have always been appreciated and certainly significantly formed MLQ's current character. We shall try to keep his clear views on scientific publishing in mind. Thank you, Benedikt, for 12 years of inspiring and productive collaboration.

We are happy that Manuel Bodirsky from the Technische Universität Dresden will replace Benedikt both as Managing Editor and as representative of the DVMLG's Board in the Editorial Office of MLQ. Manuel is well known to us and our authors as he has been a member of the Editorial Board of MLQ since 2017. His main fields of research are Constraint Satisfaction Problems and Universal Algebra. Welcome to the Editorial Office, Manuel!

Since our last editorial was published in Volume 66 (2020), a number of members of the Editorial Board were re-appointed upon nomination by the Board of the DVMLG for another term of office for three years: Steve Awodey, Zoé Chatzidakis, Victoria Gitman, Andrew Marks, and Alexandra Silva for an additional term from 1 January 2021 to 31 December 2023; Nick Bezhanishvili, Su Gao, Maria Emilia Maietti, and Anush Tserunyan for an additional term from 1 January 2022 to 31 December 2024; and John Baldwin, Artem Chernikov, Rod Downey, Ilijas Farah, Ekaterina Fokina, Stefan Geschke, Hajime Ishihara, Franziska Jahnke, and Dima Sinapova for an additional term from 1 January 2023 to 31 December 2025. After nine years of service in the Editorial Board, Jan Krajíček left the board at the end of 2022. Thanks to Jan for his commitment to make MLQ a successful project.

As new members of the Editorial Board, the following researchers were appointed for a first term from 1 January 2023 to 31 December 2025: Susanna de Rezende (Lund, Sweden), Leszek Kołodziejczyk (Warsaw, Poland), Philipp Lücke (Barcelona, Spain), and Emily Riehl (Baltimore, MD, USA). Welcome to the team!

We close this editorial with very enjoyable news: Professor Rod Downey, who is one of our editors since 2014, was awarded the Barry Cooper Prize 2023. For more details see https://www.acie.eu/2023-s-barry-cooper-prize-awarded-to-rod-g-downey/ Our cordial congratulations to Rod on this big honor!

Hamilton ON, Cottbus, Tübingen D. H. K. M. T. P.