Bickel, Kelly; Gorkin, Pamela; Greenbaum, Anne; Ransford, Thomas; Schwenninger, Felix L.; Wegert, Elias Crouzeix’s conjecture and related problems. (English) Zbl 07311218 Comput. Methods Funct. Theory 20, No. 3-4, 701-728 (2020). MSC: 47A12 47A20 47A25 47A30 47A60 30J10 PDFBibTeX XMLCite \textit{K. Bickel} et al., Comput. Methods Funct. Theory 20, No. 3--4, 701--728 (2020; Zbl 07311218) Full Text: DOI arXiv
Pagacz, Patryk; Pietrzycki, Paweł; Wojtylak, Michał Between the von Neumann inequality and the Crouzeix conjecture. (English) Zbl 1518.47010 Linear Algebra Appl. 605, 130-157 (2020). Reviewer: Roman V. Romanov (Sankt-Peterburg) MSC: 47A12 47A25 47A63 PDFBibTeX XMLCite \textit{P. Pagacz} et al., Linear Algebra Appl. 605, 130--157 (2020; Zbl 1518.47010) Full Text: DOI arXiv