The twisted Grassmann graph is the block graph of a design
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.
Innovations in Incidence Geometry
The twisted Grassmann graph is the block graph of a design.
Innovations in Incidence Geometry,
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