Skip to main content
6 events
when toggle format what by license comment
Aug 28, 2016 at 12:14 history bounty ended Oai Thanh Đào
Aug 27, 2016 at 11:09 comment added Oai Thanh Đào Dear Dr. @FedorPetrov , yes you are right
Aug 27, 2016 at 11:08 vote accept Oai Thanh Đào
Aug 27, 2016 at 11:01 comment added Fedor Petrov From both sides of the inequality, but not from your conditions!
Aug 27, 2016 at 10:53 comment added Oai Thanh Đào Dear Dr @FedorPetrov . Thank to You, but I don't think so, because when $\lambda_1=\lambda_n=0$ then $x_1, x_n$ and $y_1, y_n$ be removed in two sides.
Aug 27, 2016 at 9:31 history answered Fedor Petrov CC BY-SA 3.0