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