public GradientContainer(GradientContainer other)
{
arr = new double[other.arr.Length][];
for (int i = 0; i < other.arr.Length; i++) {
arr[i] = (double[]) other.arr[i].Clone();
}
}
public void EqualSum(double alpha, double beta, GradientContainer other)
{
var arr2 = arr;
for (int i = 0; i < arr.Length; i++) {
for (int j = 0; j < arr[i].Length; j++) {
arr2[i][j] += alpha*arr[i][j] + beta*other.arr[i][j];
}
}
}