Hi Martin, I think it should have been linear provided all vectors are in the polynomial space of your expansion. In your tests is everything in a resolved polynomial space since otherwise you are doing a collocation projections somewhere and this may not be linear. Cheers, Spencer.
On 17 Jun 2021, at 17:34, Martin Wilfried Hess <mhess@sissa.it> wrote:
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Hello,
I am calling PhysDeriv from an Expansion Class Object.
Why is this not linear?
In the sense that if I call PhysDeriv for any linear combination of vectors it should be the same as computing the linear combination of the PhysDeriv of the vectors.
Martin Hess
--
-- Martin Hess, Ph.D., Post-doctoral research fellow
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