Título:
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The univalent Bloch-Landau constant, harmonic symmetry and conformal glueing
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Autor/a:
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Carroll, Tom; Ortega Cerdà, Joaquim
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Otros autores:
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Universitat de Barcelona |
Abstract:
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By modifying a domain first suggested by Ruth Goodman in 1935 and by exploiting the explicit solution by Fedorov of the Polyá-Chebotarev problem in the case of four symmetrically placed points, an improved upper bound for the univalent Bloch-Landau constant is obtained. The domain that leads to this improved bound takes the form of a disk from which some arcs are removed in such a way that the resulting simply connected domain is harmonically symmetric in each arc with respect to the origin. The existence of domains of this type is established, using techniques from conformal welding, and some general properties of harmonically symmetric arcs in this setting are established. |
Materia(s):
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-Teoria geomètrica de funcions -Funcions de variables complexes -Geometric function theory -Functions of complex variables |
Derechos:
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(c) Elsevier Masson, 2009
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Tipo de documento:
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Artículo Artículo - Versión aceptada |
Editor:
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Elsevier Masson
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