Graphical Designs on the Brouwer-Haemers Graph
Graph Info
Vertices
81
Edges
810
Regularity
10
Eigenspaces
3
Spectrum from low to high frequency:
`0, (-1.35)^{20}, (-.9)^{60}`
Design Info
`k`-graphical design
`k=2`
Efficacy
`9/21`
Optimal
yes
Maximal
yes
Extremal
yes
1-Neighborhood is the graph
yes
Get the code
or see
Wikipedia
for more about the Brouwer-Haemers graph