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 Backward(NDarray <double> dY)
{
left.Grad = ND.AddBCleft(left.Grad, ND.Mul(dY, Yr));
right.Grad = ND.AddBCleft(right.Grad, ND.Mul(Yl, dY));
left.Backward(left.Grad);
right.Backward(right.Grad);
}