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The label of a Galois orbit of a Dirichlet character $\chi$ of modulus $N$ takes the form $N.a$, where $a$ is a letter or string of letters representing the index of the Galois orbit. The index $1$ is written as $a$, the index $2$ is written as $b$, the index $27$ is written as $ba$, and so on.

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• Review status: reviewed
• Last edited by Andrew Sutherland on 2019-01-12 15:52:06
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