An equivalent representation for weighted supremum norm on the upper half-plane

Document Type : Research Paper


Department of Mathematics, Faculty of Science, University of Kurdistan, Pasdaran Ave., Postal Code: 66177-175 Sanandaj, Iran.


In this paper, firstly, we obtain some inequalities which estimates complex polynomials on the circles. Then, we use these estimates and a Moebius transformation to obtain the dual of this estimates for the lines in upper half-plane. Finally, for an increasing weight $v$ on the upper half-plane with certain properties and holomorphic functions f on the upper half-plane we obtain an equivalent representation for weighted supremum norm.


  • Receive Date: 17 April 2013
  • Revise Date: 04 April 2014
  • Accept Date: 15 April 2014