Godsil-McKay switching and twisted Grassmann graphs
Combinatorics
2017-10-20 v3
Abstract
We show that the twisted Grassmann graphs introduced by Van Dam and Koolen are obtained by Godsil-McKay switching applied to the Grassmann graphs. The partition for the switching is constructed by a polarity of a hyperplane.
Cite
@article{arxiv.1512.09232,
title = {Godsil-McKay switching and twisted Grassmann graphs},
author = {Akihiro Munemasa},
journal= {arXiv preprint arXiv:1512.09232},
year = {2017}
}
Comments
7 pages, minor revision