4 papers
boundedness of sequence-to-function Hardy-Littlewood-Pólya-type operators
Jianjun Jin
In this paper we deal with the boundedness of certain generalized sequence-to-function Hardy-Littlewood-Pólya-type operators. We completely characterize the boundedne…
Sharp multiplier estimates for the higher-order Schwarzian derivatives of the Koebe function
Jianjun Jin
In this note we study the multiplier norm estimates for the multiplication operators between weighted Bergman spaces, whose symbols are the higher-order Schwarzian derivatives of u…
On the norms of the multiplication operators between weighted Bergman spaces
Jianjun Jin
In this paper, we study the norms of multiplication operators acting between weighted Bergman spaces. First, we provide a proof for a norm estimate previously announced in our rece…
On the integral means spectrum of univalent functions with quasconformal extensions
Jianjun Jin
In this note we show that the integral means spectrum of any univalent function admitting a quasiconformal extension to the extended complex plane is strictly less than the univers…