Impossibility of fast stable approximation of analytic functions from equispaced samples
It is shown that no stable procedure for approximating functions from equally spaced
samples can converge exponentially for analytic functions. To avoid instability, one must …
samples can converge exponentially for analytic functions. To avoid instability, one must …
Multivariate polynomial regression of Euclidean degree extends the stability for fast approximations of Trefethen functions
We address classic multivariate polynomial regression tasks from a novel perspective
resting on the notion of general polynomial $ l_p $-degree, with total, Euclidean, and …
resting on the notion of general polynomial $ l_p $-degree, with total, Euclidean, and …
Enhanced adaptive surrogate models with applications in uncertainty quantification for nanoplasmonics
N Georg, D Loukrezis, U Römer… - International Journal for …, 2020 - dl.begellhouse.com
We propose an efficient surrogate modeling technique for uncertainty quantification. The
method is based on a well-known dimension-adaptive collocation scheme. We improve the …
method is based on a well-known dimension-adaptive collocation scheme. We improve the …
Robust spectral method for numerical valuation of european options under Merton's jump‐diffusion model
We propose a novel numerical method based on rational spectral collocation and Clenshaw–
Curtis quadrature methods together with the “” transformation for pricing European vanilla …
Curtis quadrature methods together with the “” transformation for pricing European vanilla …
A New Conformal Map for Polynomial Chaos Applied to Direction-of-Arrival Estimation via UCA Root-MUSIC
S Van Brandt, J Verhaevert, T Van Hecke, H Rogier - Sensors, 2022 - mdpi.com
The effects of random array deformations on Direction-of-Arrival (DOA) estimation with root-
Multiple Signal Classification for uniform circular arrays (UCA root-MUSIC) are characterized …
Multiple Signal Classification for uniform circular arrays (UCA root-MUSIC) are characterized …
Conformally mapped polynomial chaos expansions for Maxwell's source problem with random input data
N Georg, U Römer - International Journal of Numerical …, 2020 - Wiley Online Library
Abstract Generalized Polynomial Chaos (gPC) expansions are well established for forward
uncertainty propagation in many application areas. Although the associated computational …
uncertainty propagation in many application areas. Although the associated computational …
On the use of conformal maps for the acceleration of convergence of the trapezoidal rule and sinc numerical methods
RM Slevinsky, S Olver - SIAM Journal on Scientific Computing, 2015 - SIAM
We investigate the use of conformal maps for the acceleration of convergence of the
trapezoidal rule and Sinc numerical methods. The conformal map is a polynomial …
trapezoidal rule and Sinc numerical methods. The conformal map is a polynomial …
Mesh density functions based on local bandwidth applied to moving mesh methods
Moving mesh methods provide an efficient way of solving partial differential equations for
which large, localised variations in the solution necessitate locally dense spatial meshes. In …
which large, localised variations in the solution necessitate locally dense spatial meshes. In …
Surrogate modeling and uncertainty quantification for radio frequency and optical applications
N Georg - 2021 - tuprints.ulb.tu-darmstadt.de
This thesis addresses surrogate modeling and forward uncertainty propagation for
parametric/stochastic versions of Maxwell's source and eigenproblem. Surrogate modeling …
parametric/stochastic versions of Maxwell's source and eigenproblem. Surrogate modeling …
New techniques in numerical integration: The computation of molecular integrals over exponential-type functions
RM Slevinsky - 2014 - era.library.ualberta.ca
The numerical evaluation of challenging integrals is a topic of interest in applied
mathematics. We investigate molecular integrals in the B function basis, an exponentially …
mathematics. We investigate molecular integrals in the B function basis, an exponentially …