A note on lower bounds for numerical series
R. \'Alvarez-Nodarse, K. Castillo

TL;DR
This paper clarifies that three theorems from a previous publication are actually straightforward consequences of elementary calculus, highlighting the simplicity of their proofs.
Contribution
It demonstrates that the three theorems in the referenced work are derivable from basic calculus principles, simplifying their understanding.
Findings
The three theorems follow from elementary calculus.
Proofs in the original work are formal but unnecessary.
Simplifies the understanding of the theorems' foundations.
Abstract
This note shows that the three theorems presented in J. Math. Anal. Appl. 556 (2026), 130199, whose proofs, in their present formulation, are purely formal, follow from elementary calculus.
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Taxonomy
TopicsIterative Methods for Nonlinear Equations · Mathematical functions and polynomials · Numerical Methods and Algorithms
