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47A12 Numerical range, numerical radius (9 articles)

• Heydarbeygi, Zahra; Sababheh, Mohammad; Moradi, Hamid: A convex treatment of numerical radius inequalities. (English). Czechoslovak Mathematical Journal, vol. 72 (2022), issue 2, pp. 601-614
• Fakri Moghaddam, Sadaf; Kamel Mirmostafaee, Alireza: Numerical radius inequalities for Hilbert $C^{*}$-modules. (English). Mathematica Bohemica, vol. 147 (2022), issue 4, pp. 547-566
• Bakherad, Mojtaba: Some Berezin number inequalities for operator matrices. (English). Czechoslovak Mathematical Journal, vol. 68 (2018), issue 4, pp. 997-1009
• Jahedi, Khadijeh; Yousefi, Bahmann: Numerical range of operators acting on Banach spaces. (English). Czechoslovak Mathematical Journal, vol. 62 (2012), issue 2, pp. 495-503
• Appell, Jürgen; Conti, G.; Santucci, P.: Alcune osservazioni sul rango numerico per operatori non lineari. (Italian) [Some remarks on numerical ranges for nonlinear operators]. Mathematica Bohemica, vol. 124 (1999), issue 2, pp. 185-192
• Kramar, Edvard: On the numerical range of operators on locally and on H-locally convex spaces. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 34 (1993), issue 2, pp. 229-237
• Verma, Ram U.: Numerical range and related nonlinear functional equations. (English). Czechoslovak Mathematical Journal, vol. 42 (1992), issue 3, pp. 503-513
• Acosta, Maria D.; Aguirre, Francisco J.; Payá, Rafael: A space by W. Gowers and new results on norm and numerical radius attaining operators. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 33 (1992), issue 2, pp. 5-14
• Zajac, Michal: Continuity of the spectrum of norm-normal matrices. (English). Mathematica Slovaca, vol. 28 (1978), issue 3, pp. 317-319