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Community Bot
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To expand on wccanard's comment : see my answer to this questionthis question for a general method to compute a rational function with given (principal) divisor.

This will give you $f_e$ as a rational function of $x$ and $y$. You then just need to expand this in terms of the standard formal coordinate $z=-x/y$.

To expand on wccanard's comment : see my answer to this question for a general method to compute a rational function with given (principal) divisor.

This will give you $f_e$ as a rational function of $x$ and $y$. You then just need to expand this in terms of the standard formal coordinate $z=-x/y$.

To expand on wccanard's comment : see my answer to this question for a general method to compute a rational function with given (principal) divisor.

This will give you $f_e$ as a rational function of $x$ and $y$. You then just need to expand this in terms of the standard formal coordinate $z=-x/y$.

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François Brunault
François Brunault
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To expand on wccanard's comment : see my answer to this question for a general method to compute a rational function with given (principal) divisor.

This will give you $f_e$ as a rational function of $x$ and $y$. You then just need to expand this in terms of the standard formal coordinate $z=-x/y$.