This is part of the Beauville–Fujiki form.
| type | Fujiki constant $\mathrm{c}_X$ |
|---|---|
| K3 | 1 |
| K3[n]-type | 1 |
| Kumn-type | $n+1$ |
| OG6 | 4 |
| OG10 | 1 |
the geography of compact irreducible holomorphic symplectic (or hyperkähler) varieties
This is part of the Beauville–Fujiki form.
| type | Fujiki constant $\mathrm{c}_X$ |
|---|---|
| K3 | 1 |
| K3[n]-type | 1 |
| Kumn-type | $n+1$ |
| OG6 | 4 |
| OG10 | 1 |