2 papers
math.NA2026
Adapting the Lanczos algorithm to matrices with almost continuous spectra
Jörn Zimmerling, Vladimir Druskin
We consider the approximation of where is large, symmetric positive definite, and has a dense spectrum, and $B\in\mathbb{R}^{n\time…
physics.geo-ph2025
A Targeted Quadrature Framework for Simulating Large-Scale 3D Anisotropic Electromagnetic Measurements
Jörn Zimmerling, Vladimir Druskin, Sofia Davydycheva +5
We develop a new, efficient, and accurate method to simulate frequency-domain borehole electromagnetic (EM) measurements acquired in the presence of three-dimensional (3D) variatio…