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Q5520982 - MaRDI portal

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scientific article; zbMATH DE number 3233112
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scientific article; zbMATH DE number 3233112

    Statements

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    1964
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    Pfaff forms
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    exterior differential forms
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    global existence of Bianchi's normal form
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    second-order elliptic linear differential operator in two variables
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    multiply-connected domain
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    Identifiers