1 citations · 1 across the 4 of their papers we have counts for
4 papers
Vectorized Parallel in Time methods for low-order discretizations with application to Porous Media problems
Christian Engwer, Alexander Schell, Nils-Arne Dreier
High order methods have shown great potential to overcome performance issues of simulations of partial differential equations (PDEs) on modern hardware, still many users stick to l…
Scalable Signature Kernel Computations for Long Time Series via Local Neumann Series Expansions
Matthew Tamayo-Rios, Alexander Schell, Rima Alaifari
The signature kernel is a recent state-of-the-art tool for analyzing high-dimensional sequential data, valued for its theoretical guarantees and strong empirical performance. In th…
A Robustness Analysis of Blind Source Separation
Alexander Schell
Blind source separation (BSS) aims to recover an unobserved signal from its mixture under the condition that the effecting transformation is invertible but unknown…
Nonlinear Independent Component Analysis for Discrete-Time and Continuous-Time Signals
Alexander Schell, Harald Oberhauser
We study the classical problem of recovering a multidimensional source signal from observations of nonlinear mixtures of this signal. We show that this recovery is possible (up to…