public ISet intersection([NotNull] params object[] ss)
{
ISet res = this;
foreach (object s in ss)
{
res = SetHelpers.Intersection(res, s);
}
return(res);
}
public ISet Intersection(object s)
{
return(SetHelpers.Intersection(this, s));
}
public bool isdisjoint(object s)
{
return(SetHelpers.Intersection(this, s).Count == 0);
}
