Vol. 12, No. 1, 2011

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
The twisted Grassmann graph is the block graph of a design

Akihiro Munemasa and Vladimir D. Tonchev

Vol. 12 (2011), No. 1, 1–6

In this note, we show that the twisted Grassmann graph constructed by Van Dam and Koolen is the block graph of the design constructed by Jungnickel and Tonchev. We also show that the full automorphism group of the design is isomorphic to the full automorphism group that of the twisted Grassmann graph.

Received: 13 July 2009
Accepted: 3 September 2009
Akihiro Munemasa
Vladimir D. Tonchev
Mathematical Sciences
Michigan Technological University
1400 Townsend Drive
Houghton, MI 49931-1295
United States