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关于Diophantine方程x^2+y^4=z^5
引用本文:乐茂华.关于Diophantine方程x^2+y^4=z^5[J].云南师范大学学报(自然科学版),2009,29(4):1-5.
作者姓名:乐茂华
作者单位:湛江师范学院数学系,广东,湛江,524048
基金项目:国家自然科学基金,广东省自然科学基金 
摘    要:运用无穷递降法证明了:方程X^4-10X^2Y^2+5Y^4=Z^2和X^4-50X^2Y^2+125Y^4=Z^2都没有适合gcd(X,Y)=1以及2|XY的正整数解(X,Y,Z).由此推知:方程x^2+y^4=z^5没有适合gcd(x,y)=1的正整数解(x,y,z),上述结果解决了广义Fermat猜想的一个特殊情况。

关 键 词:Diophantine方程  广义Fermat猜想  无穷递降法

On the Diophantine Equation x2+y4=z5
LE Mao-hua.On the Diophantine Equation x2+y4=z5[J].Journal of Yunnan Normal University (Natural Sciences Edition),2009,29(4):1-5.
Authors:LE Mao-hua
Institution:LE Mao - hua (Department of Mathematics ,Zhanjiang Normal College ,Zhanjiang 524048, China)
Abstract:Using the infinite descent method, we prove that the equations X^4 - 10X^2 Y^2 + 5 Y^4 = Z^2 and X^4 - 50X^2Y^2 + 125Y^4 = Z^2 have no positive integer solution (X,Y,Z) with gcd (X,Y) = 1 and2| XY. It implies that the equation x^2+ y^4= z^5 has no positive integer solution (x,y,z) with gcd (x,y) = 1 . Thus, a special case of the generalized Fermat conjecture is solved.
Keywords:diophantine equation  generalized Fermat conjecture  infinite descent
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