private static Surf.Set PartitionMap(Surf.Set T)
{
// Label the partition.
Surf.Set R = new Surf.Set();
int i = 0;
foreach (Surf.Set t in T)
{
if (t.Count > 0)
{
R.Add(new Surf.Tuple(new object[] { i, t }));
i++;
}
}
return(R.Unnest().Transpose());
}
