On perfect powers that are sums of two Pell numbers

PERIODICA MATHEMATICA HUNGARICA(2020)

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摘要
Let P_k denote the k th term of the Pell sequence. In this paper we find all solutions of the exponential Diophantine equation P_n+P_m = y^s in positive integer variables ( m , n , y , s ) under the assumption n ≡ m 2 .
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关键词
Perfect numbers, Exponential equations, Perfect powers, p-adic valuation
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