about some numbers

[dyt0414]

hi i have read the paper and the code, and i think it is very cool! But i have some questions about the code. What are the meanings of the numbers , such as ''zeros(2mn + 5n + 11mm + 8m, float64)'', in the hoag.py around line 74?

[fabianp]

these are taken from the implementation of lbfgs in scipy, see for example https://github.com/scipy/scipy/blob/v1.5.4/scipy/optimize/lbfgsb.py#L337

On Sat, Dec 5, 2020 at 11:47 PM dyt0414 [email protected] wrote:

hi i have read the paper and the code, and i think it is very cool! But i have some questions about the code. What are the meanings of the numbers , such as ''zeros(2mn + 5n + 11m*m

• 8*m, float64)'', in the hoag.py around line 74?

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[dyt0414]

Thank you so much! I access the lbfgs example in scipy, but there is no explanation too, so I track the paper which the example cites. I found the paper is hard to understand, so I try to ignore the explicit meaning of the numbers, and wonder whether these numbers are fixed in most situation the lbfgs used?

[fabianp]

Yes, that's right. They're fixed

On Tue, Dec 8, 2020, 03:23 dyt0414 [email protected] wrote:

Thank you so much! I access the lbfgs example in scipy, but there is no explanation too, so I track the paper which the example cites. I found the paper is hard to understand, so I try to ignore the explicit meaning of the numbers, and wonder whether these numbers are fixed in most situation the lbfgs used?

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