Super-resolution of near-colliding point sources

D Batenkov, G Goldman… - Information and Inference …, 2021 - academic.oup.com
We consider the problem of stable recovery of sparse signals of the form from their spectral
measurements, known in a bandwidth with absolute error not exceeding. We consider the …

Numerical analytic continuation

LN Trefethen - Japan Journal of Industrial and Applied Mathematics, 2023 - Springer
Let f be an analytic function on a simply-connected compact continuum E of the complex z-
plane. This might be an interval of the real line, where f might be real analytic. How can we …

Quantifying the ill-conditioning of analytic continuation

LN Trefethen - BIT Numerical Mathematics, 2020 - Springer
Analytic continuation is ill-posed, but becomes merely ill-conditioned (although with an
infinite condition number) if it is known that the function in question is bounded in a given …

Explicit power laws in analytic continuation problems via reproducing kernel Hilbert spaces

Y Grabovsky, N Hovsepyan - Inverse Problems, 2020 - iopscience.iop.org
The need for analytic continuation arises frequently in the context of inverse problems.
Notwithstanding the uniqueness theorems, such problems are notoriously ill-posed without …

Function Extrapolation with Neural Networks and Its Application for Manifolds

G Hay, N Sharon - arXiv preprint arXiv:2405.10563, 2024 - arxiv.org
This paper addresses the problem of accurately estimating a function on one domain when
only its discrete samples are available on another domain. To answer this challenge, we …

Rethinking super-resolution: the bandwidth selection problem

D Batenkov, A Bhandari, T Blu - ICASSP 2019-2019 IEEE …, 2019 - ieeexplore.ieee.org
Super-resolution is the art of recovering spikes from their low-pass projections. Over the last
decade specifically, several significant advancements linked with mathematical guarantees …

A physically informed deep-learning approach for locating sources in a waveguide

A Kahana, S Papadimitropoulos, E Turkel… - The Journal of the …, 2023 - pubs.aip.org
Inverse source problems are central to many applications in acoustics, geophysics, non-
destructive testing, and more. Traditional imaging methods suffer from the resolution limit …

Inversion of the Laplace Transform of Point Masses

M McKenna, HN Mhaskar, RG Spencer - arXiv preprint arXiv:2402.04348, 2024 - arxiv.org
Motivated by applications in magnetic resonance relaxometry, we consider the following
problem: Given samples of a function $ t\mapsto\sum_ {k= 1}^ K A_k\exp (-t\lambda_k) …

Reconstructing Stieltjes functions from their approximate values: a search for a needle in a haystack

Y Grabovsky - SIAM Journal on Applied Mathematics, 2022 - SIAM
Material response of real, passive, linear, time-invariant media to external influences is
described by complex analytic functions of frequency that can always be written in terms of …

Estimates for the SVD of the Truncated Fourier Transform on and Stable Analytic Continuation

C Gaillac, E Gautier - Journal of Fourier Analysis and Applications, 2021 - Springer
The Fourier transform truncated on [-c, c] has for a long time been analyzed as acting on L 2
(-1/b, 1/b) into L 2 (-1, 1) and its right-singular vectors are the prolate spheroidal wave …