The STUDIA UNIVERSITATIS BABE┼×-BOLYAI issue article summary

The summary of the selected article appears at the bottom of the page. In order to get back to the contents of the issue this article belongs to you have to access the link from the title. In order to see all the articles of the archive which have as author/co-author one of the authors mentioned below, you have to access the link from the author's name.

 
       
         
    STUDIA MATHEMATICA - Issue no. 4 / 2009  
         
  Article:   NEW ESTIMATE FOR THE NUMERICAL RADIUS OF A GIVEN MATRIX AND BOUNDS FOR THE ZEROS OF POLYNOMIALS.

Authors:  MOHAMMAD AL-HAWARI.
 
       
         
  Abstract:  In this paper we find new estimate for the numerical radius of a given matrix, and we prove that, this estimate is better than any estimate for the numerical radius. We present also new bounds for the zero of polynomials by using new estimate for the numerical radius of a companion matrix of a given polynomial and matrix inequalities.

Key words and phrases. Companion matrix, numerical radius, spectral norm, unitary matrix and zeros of polynomials.
 
         
     
         
         
      Back to previous page