利用代数数论中的同余以及整环的一些性质,证明不定方程x2 +4 =y7无整数解.推进了该类不定方程的研究.%Using the properties of congruence and integral domain in number theory, the Diophantine equation x2 +4 =y has not integer solution is provee. This result promotes the kind of indeterminate equation.
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