Download this article
 Download this article For screen
For printing
Recent Issues
Volume 18
Volume 16
Volume 15
Volume 14
Volume 13
Volume 12
Volume 11
Volume 10
Volume 9
Volume 8
Volume 6+7
Volume 5
Volume 4
Volume 3
Volume 2
Volume 1
The Journal
About the journal
Ethics and policies
Peer-review process
Submission guidelines
Submission form
Editorial board
ISSN (electronic): 2640-7345
ISSN (print): 2640-7337
Author Index
To Appear
Other MSP Journals
This article is available for purchase or by subscription. See below.
Epimorphisms of generalized polygons, B: The octagons

Joseph A. Thas and Koen Thas

Vol. 20 (2023), No. 2-3, 579–597

This is the second part of our study of epimorphisms with source a thick generalized m-gon and target a thin generalized m-gon. We classify the case m = 8 when the polygons are finite (in the first part (2022) we handled the cases m = 3,4 and 6). Then we show that the infinite case is very different, and construct examples which strongly differ from the finite case. A number of general structure theorems are obtained, and we also take a look at the infinite case for general gonality.

PDF Access Denied

We have not been able to recognize your IP address as that of a subscriber to this journal.
Online access to the content of recent issues is by subscription, or purchase of single articles.

Please contact your institution's librarian suggesting a subscription, for example by using our journal-recom­mendation form. Or, visit our subscription page for instructions on purchasing a subscription.

You may also contact us at
or by using our contact form.

Or, you may purchase this single article for USD 40.00:

generalized polygon, generalized octagon, epimorphism, thin octagon
Mathematical Subject Classification
Primary: 20B25, 20B27, 51B25, 51E12
Received: 25 October 2022
Revised: 28 April 2023
Accepted: 4 July 2023
Published: 13 September 2023
Joseph A. Thas
Department of Mathematics: Algebra and Geometry
Ghent University
Koen Thas
Department of Mathematics: Algebra and Geometry
Ghent University