On the power values of the sum of three squares in arithmetic progression

Le M., SOYDAN G.

Mathematical Communications, cilt.27, sa.2, ss.137-150, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 27 Sayı: 2
  • Basım Tarihi: 2022
  • Dergi Adı: Mathematical Communications
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, zbMATH, Directory of Open Access Journals
  • Sayfa Sayıları: ss.137-150
  • Anahtar Kelimeler: polynomial Diophantine equation, power sums, primitive divisors of Lehmer sequences, Baker's method, PERFECT POWERS, PRIMITIVE DIVISORS, EQUATION (X, LUCAS
  • Bursa Uludağ Üniversitesi Adresli: Evet

Özet

© 2022 Department of Mathematics, University of Osijek.In this paper, using a deep result on the existence of primitive divisors of Lehmer numbers due to Y. Bilu, G. Hanrot and P. M. Voutier, we first give an explicit formula for all positive integer solutions of the Diophantine equation (x−d)2 +x2 +(x+d)2 = yn (*), when n is an odd prime and d = pr, p > 3, a prime. So this improves the results of the papers of A. Koutsianas and V. Patel [19] and A. Koutsianas [18]. Secondly, under the assumption of our first result, we prove that (*) has at most one solution (x, y). Next, for a general d, we prove the following two results: (i) if every odd prime divisor q of d satisfies q ≢ ±1 (mod 2n), then (*) has only the solution (x, y, d, n) = (21, 11, 2, 3), and (ii) if n > 228000 and d > 8√2, then all solutions (x, y) of (*) satisfy yn < 23/2 d3 .