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errror in creating hessian matrix #1

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jxchen01 opened this issue Nov 16, 2017 · 1 comment

jxchen01 commented Nov 16, 2017

When creating the hessian matrix, it should be

hessian_full=[[()] * ndim for x in range(ndim)]

instead of

hessian_full = [[None] * ndim] * ndim

Xinhuan-Imperial commented May 21, 2020

The created Heissian matrix is not symmetric?

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