Abstract
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.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Complex Variables, Theory and Application: An International Journal
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
