implement spreads in GQ(q,q)
in #30223 Ivo implemented spreads in GQ(q,q^{2}), but we should also have spreads in GQ(q,q), to get more drgs as in #30337
Alerted on this possibility by Krystal Guo in https://twitter.com/guo_krystal/status/1377295829669662726
Replying to
@guo_krystal
Having painstakingly entered it into @sagemath
I discovered that it was a graph I knew!
It is GQ(2,2) with a spread deleted.
So it is an antipodal distance regular graph on 15 vertices with {4,2,1;1,1,4}. 3/n
5:24 PM · Mar 31, 2021
Change History (5)
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modified (diff)

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