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The Diophantine equation $x^4\pm y^4=iz^2$ in Gaussian integers (1005.1528v1)
Published 10 May 2010 in math.NT
Abstract: In this note we find all the solutions of the Diophantine equation $x4\pm y4=iz2$ using elliptic curves over $\mathbb Q(i)$. Also, using the same method we give a new proof of Hilbert's result that the equation $x4\pm y4=z2$ has only trivial solutions in Gaussian integers.
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