An inequality for cosine polynomials

[摘要] We prove that if a(0),a(1),...,a(n) are real numbers, then GRAPHICS with equality holding if and only if a(0)=a(1)=...=a(n) greater than or equal to 0. This inequality refines a result of L. Fejes. (C) 1997 Academic Press.

[发布日期] 1997-04-15