engleski

History and new reveals on Alzer's inequality

In 1993. Horst Alzer proved the inequality which, since then, is known as Alzer’ s inequality. However, in 1975. Jan Van de Lune stated Problem 399., which was solved by several mathematicians, and which easily implicates Alzer’ s inequality. We will show that, what is called ” Alzer’ s inequality” , is actually the result of J. Van de Lune’ s work and according to that, the above inequality we will be calling Van de Lune-Alzer’ s inequality. We will give a review of diff erent methods in proving and generalizing Van de Lune - Alzer’ s inequality as well as our corrections, refi nements and extensions of some results and proofs. New results, inspired by the generalization of Van de Lune - Alzer’ s inequality for increasing convex sequences presented by N. Elezović and J. Pečarić, will be shown.

sequences; convex functions; inequalities

nije evidentirano