Fakhfakh, Slim2024-07-122024-07-122019Fakhfakh, S. (2019). Shechter spectra and relatively demicompact linear relations. International Conference of Mathematical Sciences (ICMS 2019). s. 58.978-605-2124-29-1https://hdl.handle.net/20.500.12415/2189In this paper, we denote by L the block matrix linear relation, acting on the Banach space X ? Y , of the form where A, B, C and D are four linear relations with dense domains. We first try to determine the conditions under which a block matrix linear relation becomes a demicompact block matrix linear relation. Second, we study Shechter spectra using demicompact linear relations and relatively demicompact linear relations.enCC0 1.0 Universalinfo:eu-repo/semantics/openAccessRelatively demicompact linear relationDemicompact block matrix linear relationArticle5858