A Herglotz-Nevanlinna function from the optimal discrete $p$-Hardy weight

Abstract

It was recently proved by Fischer, Keller, and Pogorzelski in [Integr. Equ. Oper. Theory, 95(24), 2023] that the classical discrete $p$-Hardy inequality admits an improvement, and the optimal $p$-Hardy weight $\ddot{I}{‰}_p$ was determined therein. We prove that $\ddot{I}{‰}_p$ directly corresponds to a Herglotz-Nevanlinna function, establish an integral representation for this function, and consequently confirm a slight modification of a conjecture on its absolute monotonicity from the aforementioned article.

11 pages