A characterization of the tangent function.
A Generalized Mean-Value Theorem.
A note on L'Hôpital's rule.
A procedure for generating infinite series identities.
À propos d'un lemme de Tadeusz Ważewski
A two-sided estimate of .
About an estimation problem of Zahorski
An extension and a refinement of van der Corput's inequality.
Another Computation of .... .
Asymptotic form for generalized factorial