Ramanujan-Nagell's Equation and Some of its Variations
arXiv:1410.6928
Abstract
The paper consists of two parts. The aim of the first, and main, part is to explain, in an elementary way, Hasse's proof of Ramanujan-Nagell's Theorem. In the second part, we formulate some natural extensions of Ramanujan-Nagell's equation.
This paper is withdrawn. A better version will appear elsewhere