There is a helpful note here: https://huynp.com/optimization/2018/11/11/Fundamental-of-Unconstrained-Optimization.html https://huynp.com/optimization/2018/11/11

There is a helpful note here: https://huynp.com/optimization/2018/11/11/Fundamental-of-Unconstrained-Optimization.html https://huynp.com/optimization/2018/11/11/Fundamental-of-Unc...