CÁC BÀI BÁO KHOA HỌC 06:09:25 Ngày 24/10/2019 GMT+7
On an extension of Shapiro's cyclic inequality

We prove an interesting extension of the Shapiro's cyclic inequality for four and five variables and formulate a generalization of the well-known Shapiro's cyclic inequality. The method used in the proofs of the theorems in the paper concerns the positive quadratic forms. Copyright © 2009 N. M. Tuan and L. Q. Thuong.

 Tuan N.M., Thuong L.Q.
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