On Pillai's Problem involving Lucas sequences of the second kind

Abstract

In this paper we consider the Diophantine equation $V_n-b^m=c$ for given integers $b,c$ with $b\ge 2$, whereas $V_n$ varies among Lucas-Lehmer sequences of the second kind. We prove under some technical conditions that if the considered equation has at least three solutions $(n,m)$, then there is an upper bound on the size of the solutions as well as on the size of the coefficients in the characteristic polynomial of $V_n$.

24 pages

References in corpus (2)

• On a problem of Pillai with Fibonacci numbers and powers of 2
• On the Diophantine equation $U_n-b^m=c$