Department of Pure Mathematics, Ferdowsi University of Mashhad (in cooperation with the Center of Excellence in Analysis on Algebraic Structures and Tusi Mathematical Research Group)Khayyam Journal of Mathematics2423-47881120150101Approximation Numbers of Composition Operators on Weighted Hardy Spaces71811228810.22034/kjm.2015.12288ENAjay K.SharmaSchool of Mathematics, Shri Mata Vaishno Devi University, Kakryal, Katra-
182320, J& K, India.AmbikaBhatAmbika Bhat, School of Mathematics, Shri Mata Vaishno Devi University,
Kakryal, Katra-182320, J& K, India.Journal Article20151231In this paper we find upper and lower bounds for approximation numbers of compact composition operators on the weighted Hardy spaces Hσ under some conditions on the weight function σ:http://www.kjm-math.org/article_12288_4a020ff86c83907640bf945ed0fd20ac.pdf