Sequence of Multivalued Linear Operators Converging in the Generalized Sense

Álvarez, T.: On essential spectra of linear relations and quotient indecomposable normed spaces. Rocky Mt. J. Math. 42(4), 1091–1105 (2012)

Álvarez, T., Ammar, A., Jeribi, A.: On the essential spectra of some matrix of linear relations. Math. Methods Appl. Sci. 37(5), 620–644 (2014)

Ammar, A.: A characterization of some subsets of essential spectra of a multivalued linear operator. Complex Anal. Oper. Theory 11(1), 175–196 (2017)

Ammar, A.: Some results on semi-Fredholm perturbations of multivalued linear operators. Linear Multilinear Algebra 66(7), 1311–1332 (2018)

Ammar, A., Daoud, H., Jeribi, A.: The stability of pseudospectra and essential pseudospectra of linear relations. J. Pseudo-Differ. Oper. Appl. 7(4), 473–491 (2016)

Ammar, A., Diagana, T., Jeribi, A.: Perturbations of Fredholm linear relations in Banach spaces with application to $$3\times 3$$-block matrices of linear relations. Arab. J. Math. Sci. 22(1), 59–76 (2016)

Ammar, A., Fakhfakh, S., Jeribi, A.: Stability of the essential spectrum of the diagonally and off-diagonally dominant block matrix linear relations. J. Pseudo-Differ. Oper. Appl. 7(4), 493–509 (2016)

Ammar, A., Jeribi, A.: The Weyl essential spectrum of a sequence of linear operators in Banach spaces. Indag. Math. (N.S.) 27(1), 282–295 (2016)

Ammar, A., Jeribi, A., Lazrag, N.: Sequence of linear operators in non-Archimedean Banach spaces. Mediterr. J. Math. 16(5), 20 (2019). Art. 130

Ammar, A., Jeribi, A., Saadaoui, B.: Frobenius–Schur factorization for multivalued $$2\times 2$$ matrices linear operator. Mediterr. J. Math. 14(1), 29 (2017). Art. 29

Azizov, T.Y., Behrndt, J., Jonas, P., Trunk, C.: Compact and finite rank perturbations of closed linear operators and relations in Hilbert spaces. Integr. Equ. Oper. Theory 63(2), 151–163 (2009)

Azizov, T.Y., Behrndt, J., Jonas, P., Trunk, C.: Spectral points of definite type and type $$\pi $$ for linear operators and relations in Krein spaces. J. Lond. Math. Soc. (2) 83(3), 768–788 (2011)

Berger, T., Trunk, C., Winkler, H.: Linear relations and the Kronecker canonical form. Linear Algebra Appl. 488, 13–44 (2016)

Cross, R.W.: Multivalued linear operators. Monographs and Textbooks in Pure and Applied Mathematics, vol. 213. Marcel Dekker, New York (1998)

Cvetković, D.: On gaps between bounded operators. Publ. Inst. Math. (Beograd) (N.S.) 72(86), 49–54 (2002)

Favini, A., Yagi, A.: Degenerate differential equations in Banach spaces. Monographs and Textbooks in Pure and Applied Mathematics, vol. 215. Marcel Dekker, Inc., New York, xii+313 pp. ISBN: 0-8247-1677-9 (1999)

Jeribi, A.: Spectral Theory and Applications of Linear Operators and Block Operator Matrices. Springer, New York (2015)

Kato, T.: Perturbation theory for linear operators, 2nd edn. In: Grundlehren der Mathematischen Wissenschaften, Band 132. Springer, Berlin (1976)

Kostić, M.: Perturbation results for abstract degenerate Volterra integro-differential equations. J. Fract. Calc. Appl. 9(1), 137–152 (2018)

Krein, M.G., Krasnoselski, M.A.: Theoremes fundamentaux sur l’extension d’operateurs Hermitiens. Uspekhi Matematicheskikh Nauk 2(3(19)), 60–106 (1947)

Melnikova, I.V., Filinkov, A.: Abstract Cauchy problems: three approaches. Chapman and Hall/CRC Monographs and Surveys in Pure and Applied Mathematics, vol. 120. Chapman and Hall/CRC, Boca Raton, FL, xxii+236 pp. ISBN: 1-58488-250-6 (2001)

Von Neumann, J.: Über adjungierte Funktionaloperatoren (German). Ann. Math. (2) 33(2), 294–310 (1932)

Wilcox, D.: Essential spectra of linear relations. Linear Algebra Appl. 462, 110–125 (2014)