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An integral operator on the classes S*(α) and CVH(β)

Nicoleta Ularu, Nicoleta Breaz (2013)

Annales UMCS, Mathematica

The purpose of this paper is to study some properties related to convexity order and coefficients estimation for a general integral operator. We find the convexity order for this operator, using the analytic functions from the class of starlike functions of order α and from the class CVH(β) and also we estimate the first two coefficients for functions obtained by this operator applied on the class CVH(β).

An inverse Sobolev lemma.

Pekka Koskela (1994)

Revista Matemática Iberoamericana

We establish an inverse Sobolev lemma for quasiconformal mappings and extend a weaker version of the Sobolev lemma for quasiconformal mappings of the unit ball of Rn to the full range 0 < p < n. As an application we obtain sharp integrability theorems for the derivative of a quasiconformal mapping of the unit ball of Rn in terms of the growth of the mapping.

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