Lauri Nyman

activity

20222026

most citedPerturbation theory of transfer function matrices

1 citations · 1 across the 8 of their papers we have counts for

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2 papers · 1 filter

math.NA2025

Nearest matrix with multiple eigenvalues by Riemannian optimization

Vanni Noferini, Lauri Nyman, Federico Poloni

Given a square complex matrix $A$ , we tackle the problem of finding the nearest matrix with multiple eigenvalues or, equivalently when $A$ had distinct eigenvalues, the nearest def…

math.NA2025

Finding the nearest $Ω$ -stable pencil with Riemannian optimization

Vanni Noferini, Lauri Nyman

This paper considers the problem of finding the nearest $Ω$ -stable pencil to a given square pencil $A + x B \in C^{n \times n}$ , where a pencil is called $Ω$ -stable if it is…

Nearest matrix with multiple eigenvalues by Riemannian optimization

Finding the nearest Ω-stable pencil with Riemannian optimization

Finding the nearest $Ω$ -stable pencil with Riemannian optimization