Mathematics – Number Theory
Scientific paper
2011-10-26
Mathematics
Number Theory
to appear in Forum Mathematicum
Scientific paper
10.1515/FORM.2011.102
Let $p$ be a prime congruent to 1 or 3 modulo 8 so that the equation
$p=a^2+2b^2$ is solvable in integers. In this paper, we obtain closed-form
expressions for $a$ and $b$ in terms of Jacobsthal sums. This is analogous to a
classical identity of Jacobsthal.
Hashimoto Ki-Ichiro
Long Ling
Yang Yifan
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