Univalent functions with quasiconformal extensions

Autor: Paul Deiermann
Rok vydání: 1992
Předmět:
Zdroj: Complex Variables, Theory and Application: An International Journal. 19:243-257
ISSN: 1563-5066
0278-1077
DOI: 10.1080/17476939208814578
Popis: By the method of extremal length, three general theorems are proven which find, as corollaries, sharp coefficient bounds for functions univalent in the exterior of the unit disc, with a standard normalization but also assuming a finite number of initial coefficients are zero, which possess a K-quasiconformal extension to a ring subdomain of the unit disc. All extremal functions are exhibited. Similar estimates are found for functions similar to the above but which omit a fixed disc centered at the origin.
Databáze: OpenAIRE