Explicit counterexamples to Schäffer's conjecture

DOI10.1016/j.matpur.2020.10.006zbMath1480.15028arXiv1705.10704OpenAlexW3095692542WikidataQ113869068 ScholiaQ113869068MaRDI QIDQ2224714

Rachid Zarouf, Oleg Szehr

Publication date: 4 February 2021

Published in: Journal de Mathématiques Pures et Appliquées. Neuvième Série (Search for Journal in Brave)

Full work available at URL: https://arxiv.org/abs/1705.10704

zbMATH Keywords

Blaschke productSchäffer's conjecture

Mathematics Subject Classification ID

Norms (inequalities, more than one norm, etc.) of linear operators (47A30) Norms of matrices, numerical range, applications of functional analysis to matrix theory (15A60) Functional calculus for linear operators (47A60) Toeplitz operators, Hankel operators, Wiener-Hopf operators (47B35) Miscellaneous inequalities involving matrices (15A45) Toeplitz, Cauchy, and related matrices (15B05) Blaschke products (30J10)

Related Items (6)

On the asymptotic behavior of Jacobi polynomials with first varying parameter ⋮ \(l_p\)-norms of Fourier coefficients of powers of a Blaschke factor ⋮ On the condition number of a Kreiss matrix ⋮ Stationary phase method, powers of functions, and applications to functional analysis ⋮ Condition numbers of matrices with given spectrum ⋮ On isomorphisms between weighted -algebras

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