For more information on our journals visit: https://www.elsevier.com/mathematics Indagationes Mathematicae is a peer-reviewed international journal for the Mathematical Sciences of the Royal Dutch Mathematical Society. The journal aims at the publication of original mathematical research papers of high quality and of interest to a large segment of the mathematics community. The journal also welcomes the submission of review papers of high quality. Papers can be submitted via Editorial Manager. In order to enhance accessibility to the research published in Indagationes, only papers which have been uploaded to the ArXiv will be considered. Benefits to authors We also provide many author benefits, such as free PDFs, a liberal copyright policy, special discounts on Elsevier publications and much more. Please click here for more information on our author services. FAST TRACK The journal is committed to handle submissions not exceeding 15 pages within six months. In case of acceptance they will be published online within 2 months Please see our Guide for Authors for information on article submission. If you require any further information or help, please visit our support pages: https://service.elsevier.com This journal has an Open Archive. All published items, including research articles, have unrestricted access and will remain permanently free to read and download 48 months after publication. All papers in the Archive are subject to Elsevier's user license. We recognize that in recent years a growing number of researchers have chosen to publish in Open Access. As a Hybrid OA journal, Indagationes Mathematicae is included in Elsevier's transformative agreements, helping authors affiliated with member institutions of participating organizations to publish their research open access without having to pay an APC (i.e. at no charge to the author) while still relying on high-quality peer-review and experienced editorial support. The cost of publishing open access is covered under the terms of the agreement. Please follow this linkfor the current list of agreements and participating organizations.