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math.FA2018
Estimate for norm of a composition operator on the Hardy-Dirichlet space
Perumal Muthukumar, Saminathan Ponnusamy, Hervé Queffélec
By using the Schur test, we give some upper and lower estimates on the norm of a composition operator on , the space of Dirichlet series with square summable coeffic…
math.FA2018
Weighted composition operators on the class of subordinate functions
Perumal Muthukumar, Saminathan Ponnusamy
In this article, we study the weighted composition operators preserving the class of analytic functions subordinate to for .…