# Tag Info

### $K3$ surfaces in $\mathbb P^1 \times \mathbb P^1 \times \mathbb P^1$
In the generic case you'll have $\text{NS}(S)\otimes\mathbb R\cong\mathbb R^3$ and you can compute the $3$-by-$3$ matrix for the action of the three involutions $i_1,i_2,i_3$ on, say, a basis ...