public override void Forward()
{
left.Forward();
right.Forward();
Y = ND.Add(left.Y, right.Y);
if (left.Grad == null)
{
left.Grad = new NDarray <double>(left.Y.Shape);
}
if (right.Grad == null)
{
right.Grad = new NDarray <double>(right.Y.Shape);
}
}
public override void Backward(NDarray <double> dY)
{
Grad = ND.Add(Grad, dY.T);
function.Backward(Grad);
}