Multiplication Operator on Köthe Spaces: Measure of Non-compactness and Closed Range

René Erlin Castillo, Humberto Rafeiro, Julio C. Ramos-Fernández, Margot Salas-Brown

    Research output: Contribution to journalResearch Articlepeer-review

    10 Scopus citations

    Abstract

    We calculate the measure of non-compactness of the multiplication operator Mu acting on non-atomic Köthe spaces. We show that all bounded below multiplication operators acting on Köthe spaces are surjective and therefore bijective and we give some new characterizations about closedness of the range of Mu acting on Köthe spaces.

    Original languageEnglish (US)
    Pages (from-to)1523-1534
    Number of pages12
    JournalBulletin of the Malaysian Mathematical Sciences Society
    Volume42
    Issue number4
    DOIs
    StatePublished - Jul 15 2019

    All Science Journal Classification (ASJC) codes

    • General Mathematics

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