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JOURNALS // Zapiski Nauchnykh Seminarov POMI // Archive

Zap. Nauchn. Sem. LOMI, 1988 Volume 168, Pages 23–31 (Mi znsl5578)

On sets of values of initial coefficients in the class of meromorphic functions with the bounded boundary rotation

E. G. Goluzina


Abstract: A description of the range of system $(a_1,a_2,\dots,a_n)$ is given in class $\Lambda_k$ $(k\geq2)$ of functions $f(z)=z^{-1}+\sum^\infty_{n=0}a_nz^n$, regular in $0<|z|<1$, $f^\prime(z)\ne0$, mapping $|z|<1$ onto a domain with boundary rotation $\alpha\leq k\pi$. For this one makes use of the representation of functions of class $\Lambda_k$ in terms of functions of the Caratheodory class.

UDC: 517.54



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