lbfgsb.quartic_grad

lbfgsb.quartic_grad(x: ndarray[tuple[Any, ...], dtype[float64]]) → ndarray[tuple[Any, ...], dtype[float64]]

The gradient of the Quartic function.

Parameters:

x (array_like) – 1-D array of points at which the Quartic function is to be derivated.

Returns:

The gradient of the Quartic function.

Return type:

NDArrayFloat