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An inequality concerning subharmonic functions in an infinite strip . - MaRDI portal

An inequality concerning subharmonic functions in an infinite strip . (Q566528)

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scientific article; zbMATH DE number 2550560
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An inequality concerning subharmonic functions in an infinite strip .
scientific article; zbMATH DE number 2550560

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    An inequality concerning subharmonic functions in an infinite strip . (English)
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    1932
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    Ist \(S\) der Streifen \(0 \leqq x \leqq \pi \) in der \(z=(x+iy)\)-Ebene, \(L\) sein Rand, so wird gezeigt: Es gibt eine absolute Konstante \(A\), so daß für jede in \(S\) stetige, positive, beschränkte subharmonische Funktion \(U(z)\) mit \(\lim _{y\to \infty } U(z)=0\) gleichmäßig in \(x\), jede konvexe Kurve \(C\) aus \(S\) und jedes \(\lambda \geqq 2\) gilt: \[ \int \limits _C U^\lambda (z) | dz | \leqq A\int \limits _L U^\lambda (z) | dz | . \]
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