References
- B. Abdelhedi, W. Boubaker, and N. Moalla, On the essential numerical spectrum of operators on Banach spaces, Filomat 33 (2019), no. 7, 2191-2199. https://doi.org/10.2298/fil1907191a
- M. Adler, W. Dada, and A. Radl, A semigroup approach to the numerical range of operators on Banach spaces, Semigroup Forum 94 (2017), no. 1, 51-70. https://doi.org/10.1007/s00233-015-9752-y
- M. Barraa and V. Muller, On the essential numerical range, Acta Sci. Math. (Szeged) 71 (2005), no. 1-2, 285-298.
- F. Bonsall and J. Duncan, Numerical ranges of operators on normed spaces and of elements of normed algebras, London Mathematical Society Lecture Note Series, 2, Cambridge Univ. Press, London, 1971.
- F. Bonsall and J. Duncan, Numerical ranges. II, London Mathematical Society Lecture Note Series, No. 10, Cambridge Univ. Press, New York, 1973.
- W. Boubaker, N. Moalla, and A. Radl, On the joint numerical spectrum in Banach spaces, Bull. Iranian Math. Soc. 45 (2019), no. 2, 345-358. https://doi.org/10.1007/s41980-018-0136-4
- A. Dash, Joint numerical range, Glasnik Mat. Ser. III 7(27) (1972), 75-81.
- K.-J. Engel and R. J. Nagel, One-parameter semigroups for linear evolution equations, Graduate Texts in Mathematics, 194, Springer, New York, 2000.
- K. E. Gustafson and D. K. M. Rao, Numerical Range, Universitext, Springer, New York, 1997. https://doi.org/10.1007/978-1-4613-8498-4
- J. Janas, Note on the joint spectrum of the Wiener-Hopf operators, Proc. Amer. Math. Soc. 50 (1975), 303-308. https://doi.org/10.2307/2040557
- A. Jeribi, Linear operators and their essential pseudospectra, CRC Press, Boca Raton, 2018.
- A. Jeribi, Denseness, bases and frames in Banach spaces and applications, De Gruyter, Berlin, 2018. https://doi.org/10.1515/9783110493863
- A. Jeribi, Spectral Theory and Applications of Linear Operators and Block Operator Matrices, Springer, Cham, 2015. https://doi.org/10.1007/978-3-319-17566-9
- A. Jeribi, Perturbation theory for linear operators-denseness and bases with applications, Springer, Singapore, 2021. https://doi.org/10.1007/978-981-16-2528-2
- J. C. Kim, On joint Weyl and Browder spectra, Bull. Korean Math. Soc. 37 (2000), no. 1, 53-62.
- A. Lebow and M. Schechter, Semigroups of operators and measures of noncompactness, J. Funct. Anal. 7 (1971), 1-26. https://doi.org/10.1016/0022-1236(71)90041-3
- C.-K. Li and Y.-T. Poon, Convexity of the joint numerical range, SIAM J. Matrix Anal. Appl. 21 (1999), no. 2, 668-678. https://doi.org/10.1137/S0895479898343516
- C.-K. Li and Y.-T. Poon, The joint essential numerical range of operators: convexity and related results, Studia Math. 194 (2009), no. 1, 91-104. https://doi.org/10.4064/sm194-1-6
- L. T. Mang, The joint numerical range and the joint essential numerical range, Mphil. THESIS, 2013.
- V. Muller, The joint essential numerical range, compact perturbations, and the Olsen problem, Studia Math. 197 (2010), no. 3, 275-290. https://doi.org/10.4064/sm197-3-5
- V. Wrobel, Joint spectra and joint numerical ranges for pairwise commuting operators in Banach spaces, Glasgow Math. J. 30 (1988), no. 2, 145-153. https://doi.org/10.1017/S0017089500007163
- Y. Yang, Joint spatial numerical ranges of operators on Banach spaces, Bull. Korean Math. Soc. 26 (1989), no. 2, 119-126.