| Graph Info | |
|---|---|
| Vertices | 20 |
| Edges | 30 |
| Regularity | 3 |
| Eigenspaces | 12 |
Spectrum from low to high frequency:
`0,
-1.90689^2,
-0.3105^2,
-0.3333,
-1.66669,
-0.4607^2,
-1.53929^2,
-1.48349^2,
-0.6324^2,
-1.33329,
-0.79400^2,
-1.20599^2`
| Graph Info | |
|---|---|
| Vertices | 20 |
| Edges | 30 |
| Regularity | 3 |
| Eigenspaces | 12 |
| Design Info | |
|---|---|
`k`-graphical design |
`k=9`
|
| Efficacy | `5/15` |
| Optimal | yes |
| Maximal | yes |
| Extremal | yes |
| 1-Neighborhood is the graph | yes |