Abstract
Loewner Theory is a deep technique in Complex Analysis affording a basis for many further important developments such as the proof of famous Bieberbach’s conjecture and well-celebrated Schramm’s stochastic Loewner evolution. It provides analytic description of expanding domains dynamics in the plane. Two cases have been developed in the classical theory, namely the radial and the chordal Loewner evolutions, referring to the associated families of holomorphic self-mappings being normalized at an internal or boundary point of the reference domain, respectively. Recently there has been introduced a new approach (Bracci F et al. in Evolution families and the Loewner equation I: the unit disk. Preprint 2008. Available on ArXiv 0807.1594; Bracci F et al. in Math Ann 344:947–962, 2009; Contreras MD et al. in Loewner chains in the unit disk. To appear in Revista Matemática Iberoamericana; preprint available at arXiv:0902.3116v1 [math.CV]) bringing together, and containing as quite special cases, radial and chordal variants of Loewner Theory. In the framework of this approach we address the question what kind of systems of simply connected domains can be described by means of Loewner chains of chordal type. As an answer to this question we establish a necessary and sufficient condition for a set of simply connected domains to be the range of a generalized Loewner chain of chordal type. We also provide an easy-to-check geometric sufficient condition for that. In addition, we obtain analogous results for the less general case of chordal Loewner evolution considered in (Aleksandrov IA et al. in Complex Analysis. PWN, Warsaw, pp 7–32, 1979; Bauer RO in J Math Anal Appl 302: 484–501, 2005; Goryainov VV and Ba I in Ukrainian Math J 44:1209–1217, 1992).
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Communicated by Dr. Alexander Vasiliev.
M. D. Contreras and S. Díaz-Madrigal were partially supported by the Ministerio de Ciencia e Innovación and the European Union (FEDER), projects MTM2006-14449-C02-01 and MTM2009-14694-C02-02, by La Consejería de Educación y Ciencia de la Junta de Andalucía and by the ESF Networking Programme “Harmonic and Complex Analysis and its Applications”.
P. Gumenyuk was partially supported by the ESF Networking Programme “Harmonic and Complex Analysis and its Applications”, by the Scandinavian Network “Analysis and Applications” (NordForsk), project #080151, and the Research Council of Norway, project #177355/V30.
An erratum to this article can be found at http://dx.doi.org/10.1007/s11785-012-0246-6
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Contreras, M.D., Díaz-Madrigal, S. & Gumenyuk, P. Geometry Behind Chordal Loewner Chains. Complex Anal. Oper. Theory 4, 541–587 (2010). https://doi.org/10.1007/s11785-010-0057-6
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DOI: https://doi.org/10.1007/s11785-010-0057-6
Keywords
- Univalent functions
- Loewner chains
- Loewner evolution
- Evolution families
- Chordal Loewner equation
- Parametric representation