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Medientyp:
E-Artikel
Titel:
Extremal Problems for Quasiconformal Maps of Punctured Plane Domains
Beteiligte:
Marković, Vladimir
Erschienen:
American Mathematical Society, 2002
Erschienen in:Transactions of the American Mathematical Society
Sprache:
Englisch
ISSN:
0002-9947
Entstehung:
Anmerkungen:
Beschreibung:
<p> The main goal of this paper is to give an affirmative answer to the long-standing conjecture which asserts that the affine map is a uniquely extremal quasiconformal map in the Teichmüller space of the complex plane punctured at the integer lattice points. In addition we derive a corollary related to the geometry of the corresponding Teichmüller space. Besides that we consider the classical dual extremal problem which naturally arises in the tangent space of the Teichmüller space. In particular we prove the uniqueness of Hahn-Banach extension of the associated linear functional given on the Bergman space of the integer lattice domain. Several useful estimates related to the local and global properties of integrable meromorphic functions and the delta functional (see the definition below) are also obtained. These estimates are intended to study the behavior of integrable functions near singularities and they are valid in general settings. </p>