Models and Integral Differentials of Hyperelliptic Curves

Simone Muselli*

*Corresponding author for this work

Research output: Working paperPreprint

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Let $C: y^2=f(x)$ be a hyperelliptic curve of genus $g\geq 1$, defined over a complete discretely valued field $K$, with ring of integers $O_K$. Under certain conditions on $C$, mild when residue characteristic is not $2$, we explicitly construct the minimal regular model with normal crossings $\mathcal{C}/O_K$ of $C$. In the same setting we determine a basis of integral differentials of $C$, that is an $O_K$-basis for the global sections of the relative dualising sheaf $\omega_{\mathcal{C}/O_K}$.
Original languageEnglish
Number of pages57
Publication statusUnpublished - 3 Mar 2020


  • hyperelliptic curves
  • models of curves
  • dualising sheaf


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