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Linear combinations of prime powers in sums of terms of binary recurrence sequences

Number Theory 2016-12-20 v1

Abstract

Let {Un}n0\{ {U_{n}\}_{n \geq 0} } be a non-degenerate binary recurrence sequence with positive discriminant. Let {p1,,ps}\{p_1,\ldots, p_s\} be fixed prime numbers and {b1,,bs}\{b_1,\ldots ,b_s\} be fixed non-negative integers. In this paper, we obtain the finiteness result for the solution of the Diophantine equation Un1++Unt=b1p1z1++bspszsU_{n_{1}} + \cdots + U_{n_{t}} = b_1 p_1^{z_1} + \cdots+ b_s p_s^{z_s} under certain assumptions. Moreover, we explicitly solve the equation Fn1+Fn2=2z1+3z2F_{n_1}+ F_{n_2}= 2^{z_1} +3^{z_2}, in non-negative integers n1,n2,z1,z2n_1, n_2, z_1, z_2 with z2z1z_2\geq z_1. The main tools used in this work are the lower bound for linear forms in logarithms and the Baker-Davenport reduction method.

Keywords

Cite

@article{arxiv.1612.05869,
  title  = {Linear combinations of prime powers in sums of terms of binary recurrence sequences},
  author = {N. K. Meher and S. S. Rout},
  journal= {arXiv preprint arXiv:1612.05869},
  year   = {2016}
}

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16 pages