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- import numpy as np
- from scipy.optimize import _minimize
- from scipy import special
- import matplotlib.pyplot as plt

Note the underscore before 'minimize' when importing from scipy.optimize; '_minimize' Also, i tested the functions from this link before doing this section, and found I had less trouble/it worked faster, if I imported 'special' separately. The Rosenbrock function on the linked page was incorrect - you have to configure the colorbar first; I've posted alternate code but think it could be better.

Further examples to come.

See here for an explanation of Hessian Matrix