Browsing by Subject "Sine polynomial"

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    • Article  

      A sharp bound for a sine polynomial 

      Alzer, H.; Koumandos, S. (2003)
      We prove that (Formula Presented) for all integers n ≥ 1 and real numbers x. The upper bound Si(π) is best possible. This result refines inequalities due to Fejér (1910) and Lenz (1951). © 2003, Instytut Matematyczny. All ...