On the Proof of Bushell-Trustrum Inequality

  •  Shiqing Wang    
  •  Yan Lou    


Bushell and Trustrum (Bushell, 1990, p. 173-178) give the famous Bushell-Trustrum inequality, but their proof
exists two main mistakes which make their proof process can not establish. This paper corrects these mistakes
and gives the correct proof.

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