public double Dot(double[] that)
{
double sum = 0.0;
Queue <int> queue = new Queue <int>();
queue = st.Keys();
int number = 0;
int size = queue.Size();
for (int i = 0; i < size; i++)
{
number = queue.dequeue();
sum += that[number] * this.Get(number);
}
return(sum);
}
