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A Note on the Index of B-Fredholm Operators

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985840%3A_____%2F04%3A00106839" target="_blank" >RIV/67985840:_____/04:00106839 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    A Note on the Index of B-Fredholm Operators

  • Original language description

    We know that if S,T are commuting B-Fredholm operators acting on a Banach space X, then ST is a B-Fredholm operator. In this note we show that in general wedo not have ind (ST) = ind (S) + ind (T). However, if there exist U, V such that S, T, U, V are commuting and US + VT = I, then ind (ST) = ind (S) + ind (T).

  • Czech name

    Poznámka o indexu B-Fredholmovských operátorů

  • Czech description

    Je známo, že když S a T jsou komutující B-Fredholmovské operátory na Banachově prostoru X, pak ST je B-Fredholmův operátor.V této poznámce ukazujeme, že obecně neplatí ind (ST) = ind (S) + ind(T). Nicméně, jestliže existují U,V tak, že S, T, U, V komutují a US + VT = I, pak ind (ST) = ind (S) + ind (T).

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    BA - General mathematics

  • OECD FORD branch

Result continuities

  • Project

    <a href="/en/project/KSK1019101" target="_blank" >KSK1019101: Mathematics, computer science and cybernetics: methods, tools and applications</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2004

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Mathematica Bohemica

  • ISSN

    0862-7959

  • e-ISSN

  • Volume of the periodical

    129

  • Issue of the periodical within the volume

    2

  • Country of publishing house

    CZ - CZECH REPUBLIC

  • Number of pages

    4

  • Pages from-to

    177-180

  • UT code for WoS article

  • EID of the result in the Scopus database