A topological characterization of the product of two closed operators
Bekkai Messirdi ; Mohammed Hichem Mortad ; Abdelhalim Azzouz ; Ghouti Djellouli
Colloquium Mathematicae, Tome 111 (2008), p. 269-278 / Harvested from The Polish Digital Mathematics Library
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The purpose of this work is to give a topological condition for the usual product of two closed operators acting in a Hilbert space to be closed.

Publié le : 2008-01-01
EUDML-ID : urn:eudml:doc:283998 
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     title = {A topological characterization of the product of two closed operators},
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     year = {2008},
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Bekkai Messirdi; Mohammed Hichem Mortad; Abdelhalim Azzouz; Ghouti Djellouli. A topological characterization of the product of two closed operators. Colloquium Mathematicae, Tome 111 (2008) pp. 269-278. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-cm112-2-4/