2 papers
math.NA2024
Tensor-Product Split-Simplex Summation-By-Parts Operators
Zelalem Arega Worku, Jason E. Hicken, David W. Zingg
We present an approach to construct efficient sparse summation-by-parts (SBP) operators on triangles and tetrahedra with a tensor-product structure. The operators are constructed b…
math.OC2023
A Solution to the Ill-Conditioning of Gradient-Enhanced Covariance Matrices for Gaussian Processes
André L. Marchildon, David W. Zingg
Gaussian processes provide probabilistic surrogates for various applications including classification, uncertainty quantification, and optimization. Using a gradient-enhanced covar…