Comment on "Quantum bound states with zero binding energy"
Sergio A. Hojman, Dar\'io N\'u\~nez

TL;DR
This paper demonstrates that solutions to zero energy Schrödinger equations for certain potentials can be derived from free particle solutions using an existing algorithm, and introduces new solutions to these equations.
Contribution
It shows a straightforward method to obtain solutions for zero energy Schrödinger equations from free particle solutions and presents new solutions.
Findings
Solutions derived from free particle solutions for zero energy cases
New solutions to zero energy Schrödinger equations
Validation of the algorithm's applicability
Abstract
The purpose of this Comment is to show that the solutions to the zero energy Schr\"odinger equations for monomial central potentials discussed in a recently published Letter, may also be obtained from the corresponding free particle solutions in a straight forwardly way, using an algorithm previously devised by us. New solutions to the zero energy Schr\"odinger equation are also exhibited.
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