2 papers
math.NA2026
Closest Normal Matrix Found Again Using Riemannian Optimization
Vanni Noferini, Matvei Zhukov
We propose an approach based on Riemannian optimization to compute a nearest normal matrix to a given one. The problem can be formulated as the minimization of a smooth function ei…
math.PR2025
Sharp constants relating the sub-Gaussian norm and the sub-Gaussian parameter
Lasse Leskelä, Matvei Zhukov
We determine the optimal constants in the classical inequalities relating the sub-Gaussian norm \(\|X\|_{ψ_2}\) and the sub-Gaussian parameter \(σ_X\) for centered real-valued rand…