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Univalent functions of fast growth with gap power series

Published online by Cambridge University Press:  01 November 1999

ALEXANDRE EREMENKO
Affiliation:
Purdue University, West Lafayette, IN 47907, U.S.A. e-mail: eremenko@math.purdue.edu
WALTER HAYMAN
Affiliation:
Imperial College, London SW7 2BZ

Abstract

We construct univalent functions in the unit disc, whose coefficient sequences (an) have arbitrarily long intervals of zeros and at the same time arbitrarily long intervals where [mid ]an[mid ] > nεn holds, (εn) being an arbitrary prescribed sequence of positive numbers tending to zero. Furthermore we show that the initial interval of coefficients of such a function can be prescribed to be any interior point of the coefficient region.

Type
Research Article
Copyright
© The Cambridge Philosophical Society 1999

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