We study the relationships between the spectra derived from Fredholm theory corresponding to two given bounded linear operators acting on the same space. The main goal of this paper is to obtain sufficient conditions for which the spectra derived from Fredholm theory and other parts of the spectra corresponding to two given operators are preserved. As an application of our results, we give conditions for which the above mentioned spectra corresponding to two multiplication operators acting on the...

Si considera l’equazione astratta $B{A}_{1}u+A_{0}u=h$, dove $A_i$$ ( i = 0... A note on singular points of convex functions in Banach spaces Luděk Zajíček (1993) Acta Universitatis Carolinae. Mathematica et Physica A note on solutions of semilinear equations at resonance in a cone Bogdan Przeradzki (1993) Annales Polonici Mathematici A connection between the Landesman-Lazer condition and the solvability of the equation Lx = N(x) in a cone with a noninvertible linear operator L is studied. The result is based on the abstract framework from [5], applied to the existence of periodic solutions of ordinary differential equations, and compared with theorems by Santanilla (see [7]). A note on some fixed point results. Aranđelović, Ivan D., Petković, Dojčin S. (2009) Applied Mathematics E-Notes [electronic only] A note on “Some results on multi-valued weakly Jungck mappings in b-metric space” Monica-Felicia Bota, Erdal Karapınar (2013) Open Mathematics The proofs of Theorems 2.1, 2.2 and 2.3 from [Olatinwo M.O., Some results on multi-valued weakly jungck mappings in b-metric space, Cent. Eur. J. Math., 2008, 6(4), 610–621] base on faulty evaluations. We give here correct but weaker versions of these theorems. A note on spectra of weighted composition operators on weighted Banach spaces of holomorphic functions. Wolf, Elke (2008) Bulletin of the Malaysian Mathematical Sciences Society. Second Series A Note On Spectral And Prespectral Operators. T.V. Panchapagesan (1982) Revista colombiana de matematicas A note on stability for linear partial differential equations D. Žubrinić (1987) Matematički Vesnik A note on stability properties of integrated semigroups Danilo Rastović (1995) Acta Mathematica et Informatica Universitatis Ostraviensis A note on strictly cyclic shifts on ℓ p . Fricke, Gerd H. (1978) International Journal of Mathematics and Mathematical Sciences A note on strong convergence of a modified Halpern's iteration for nonexpansive mappings. Wang, Shuang (2010) Fixed Point Theory and Applications [electronic only] A note on strong resonance problems for p -Laplacian. Jin, Chunhua, Ke, Yuanyuan, Yin, Jingxue (2006) Electronic Journal of Differential Equations (EJDE) [electronic only] A note on subnormal operators R. N. Mukherjee (1979) Matematički Vesnik A note on Tauberian operators. Araujo, Jesús, Martinez-Maurica, J. (1990) International Journal of Mathematics and Mathematical Sciences Currently displaying 481 – 500 of 1497 Previous Page 25 Next $