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06/10/2023
Using orthogonally structured positive bases for constructing positive k-spanning sets with cosine measure guarantees
Positive spanning sets span a given vector space by nonnegative linear c...
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12/15/2021
Error Analysis of Surrogate Models Constructed through Operations on Sub-models
Model-based methods are popular in derivative-free optimization (DFO). I...
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04/23/2021
Approximating the diagonal of a Hessian: which sample set of points should be used
An explicit formula to approximate the diagonal entries of the Hessian i...
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04/01/2021
Limiting behaviour of the generalized simplex gradient as the number of points tends to infinity on a fixed shape in R^n
This work investigates the asymptotic behaviour of the gradient approxim...
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06/01/2020