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JOURNALS // Journal of Siberian Federal University. Mathematics & Physics // Archive

J. Sib. Fed. Univ. Math. Phys., 2023 Volume 16, Issue 2, Pages 275–278 (Mi jsfu1077)

A note on the Diophantine equation $\left( 4^{q}-1\right) ^{u} +\left( 2^{q+1}\right) ^{v}=w^{2}$

Djamel Himanea, Rachid Boumahdib

a Faculty of Mathematics University of USTHB, Alger, Algeria
b National High School of Mathematics, Alger, Algeria

Abstract: Let $a, b$ and $ c $ be positive integers such that $a^{2}+b^{2}=c^{2}$ with $\gcd \left( a,b,c\right) =1$, $a$ even. Terai's conjecture claims that the Diophantine equation $x^{2}+b^{y}=c^{z}$ has only the positive integer solution $(x,y,z)=(a,2,2)$. In this short note, we prove that the equation of the title, has only the positive integer solution $(u,v,w)=(2,2,4^{q}+1),$ where $q$ is a positive integer.

Keywords: Terai's conjecture, Pythagorean triple.

UDC: 511.5

Received: 03.11.2022
Received in revised form: 01.12.2022
Accepted: 20.02.2023

Language: English



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© Steklov Math. Inst. of RAS, 2024