Title of article
An Inequality for Cosine Polynomials
Author/Authors
Horst Alzer، نويسنده ,
Issue Information
دوهفته نامه با شماره پیاپی سال 1997
Pages
4
From page
567
To page
570
Abstract
We prove that if a0, a1, . . . , an are real numbers, then
p1 n p1 n
H02a0q k s1 ak cos kx. dxH02q k s1 cos kx. dx
1 i
G min anq1yk , / 1FiFnq1 iks1
with equality holding if and only if a0sa1s ??? sanG0. This inequality refines
a result of L. Fejes.
Journal title
Journal of Mathematical Analysis and Applications
Serial Year
1997
Journal title
Journal of Mathematical Analysis and Applications
Record number
929510
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