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Drazin invertibility of sum and product of closed linear operators

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dc.contributor.author MESSIRD, Bekkai
dc.contributor.author MESSIRDI, Sanaa
dc.contributor.author MESSIRDI, Miloud
dc.date.accessioned 2019-06-24T10:28:52Z
dc.date.available 2019-06-24T10:28:52Z
dc.date.issued 2014
dc.identifier.uri http://e-biblio.univ-mosta.dz/handle/123456789/11102
dc.description.abstract The paper present a survey of results concerning the fundamental properties of the Drazin inverse for bounded operators and an interesting study of the Drazin inverse for a closed operator in a Banach space. Some necessary and sufficient conditions for A closed linear operator to possess a Drazin inverse AD are given, we obtain also a useful caracterization and explicit formula for the Drazin inverse (A+ B) D and (AB) D if A and B are closed operators. en_US
dc.publisher Malaya Journal of Matematik en_US
dc.title Drazin invertibility of sum and product of closed linear operators en_US
dc.type Article en_US


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