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Dirichlet series with positive real part

Published online by Cambridge University Press:  17 April 2009

N. Samaris
N. Samaris
Affiliation:
Department of Mathematics, University of Patras, 261–10 Patras, Greece
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Abstract

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We consider the sequence Λ = {0 < λ2 < λ2 < …}, for which λn → +∞. We denote by PD(Λ) the class of Dirichlet's series having the form F(s) = defined in the half plan Re s > 0 converging absolutely and Re F ≥ 0. If N0 = {0, 1,2, …} then the class PD(N0) coincides with the Caratheodory's class P. In this paper some classical results holding for the class P are generalised in any class PD(Λ). In special cases for the sequence Λ extreme problems are examined in the class PD(Λ).

Type
Research Article
Information
Bulletin of the Australian Mathematical Society , Volume 46 , Issue 1 , August 1992 , pp. 159 - 166
Copyright
Copyright © Australian Mathematical Society 1992

References

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