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Etude de l'équation (1/2) \(\Delta u-u\mu =0\), où \(\mu\) est une mesure positive. (Study of the equation (1/2) \(\Delta u-u\mu =0\), where \(\mu\) is a positive measure) - MaRDI portal

Etude de l'équation (1/2) \(\Delta u-u\mu =0\), où \(\mu\) est une mesure positive. (Study of the equation (1/2) \(\Delta u-u\mu =0\), where \(\mu\) is a positive measure) (Q1103101)

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scientific article; zbMATH DE number 4052104
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English
Etude de l'équation (1/2) \(\Delta u-u\mu =0\), où \(\mu\) est une mesure positive. (Study of the equation (1/2) \(\Delta u-u\mu =0\), where \(\mu\) is a positive measure)
scientific article; zbMATH DE number 4052104

    Statements

    Etude de l'équation (1/2) \(\Delta u-u\mu =0\), où \(\mu\) est une mesure positive. (Study of the equation (1/2) \(\Delta u-u\mu =0\), where \(\mu\) is a positive measure) (English)
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    1988
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    On montre que les solutions faibles de l'équation \(\Delta u-u\mu =0\), où \(\mu\) est une mesure positive négligeant les polaires, vérifient une inégalité de Harnack. On s'occupe également des sursolutions dont on fait la représentation intégrale à l'aide d'une fonction de Green. Comme les solutions sont discontinues, on est amené à utiliser les formules probabilistes.
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    weak solution
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    positive measure
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    Harnack inequality
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    supersolution
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    integral representation
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    Green function
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