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Q3905772 - MaRDI portal

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scientific article
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scientific article

    Statements

    author
    Alain Grigis
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    publication date
    1980
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    zbMATH Keywords
    propagation of singularities
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    Laplacian
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    Levi form
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    pseudo-differential operators
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    double characteristics
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    Identifiers

    Mathematics Subject Classification ID
    35A20
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    35S05
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    58J47
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    zbMATH DE Number
    3714140
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