Zhang, Hanfang An extension and stability of Demir-Marsh inequality. (Chinese. English summary) Zbl 1299.26039 J. Jiangsu Norm. Univ., Nat. Sci. 31, No. 3, 13-20 (2013). MSC: 26D05 Inequalities for trigonometric functions and polynomials Keywords:Demir-Marsh inequality; Maclaurin inequality; identity; stability PDFBibTeX XMLCite \textit{H. Zhang}, J. Jiangsu Norm. Univ., Nat. Sci. 31, No. 3, 13--20 (2013; Zbl 1299.26039)