2 papers
math.CA2025
A note on lower bounds for numerical series
R. Ãlvarez-Nodarse, K. Castillo
After passage to the representing measure, the three principal theorems of Esstafa and Sfaxi, J. Math. Anal. Appl. 556 (2026), 130199, reduce respectively to Jensen's inequality, o…
math.CA2025
A Note on the Paper "Localization of Zeros of Polar Polynomials on the Unit Disk"
Renato Alvarez-Nodarse, Kenier Castillo
We show that none of the principal claims of Costas-Santos and Rehouma, Rocky Mountain J. Math. 54 (2024), 995-1004, survives as a new and valid result. The main localisation theor…