Godsil-McKay switching and twisted Grassmann graphs
classification
🧮 math.CO
keywords
graphsgrassmannswitchinggodsil-mckaytwistedappliedconstructedhyperplane
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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.
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