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    STUDIA MATHEMATICA - Issue no. 3 / 2014  
         
  Article:   THE WEIGHTED MEAN OPERATOR ON l2 WITH WEIGHT SEQUENCE wn= (n + 1)p IS HYPONORMAL FOR p = 2.

Authors:  .
 
       
         
  Abstract:   Posinormality is used to demonstrate that the weighted mean matrix whose weight sequence is the sequence of squares of positive integers is a hyponormal operator on l2.

Mathematics Subject Classi fication (2010): 47B20.

Keywords: hyponormal operator, posinormal operator, factorable matrix,weighted mean matrix.
 
         
     
         
         
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