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MiS Preprint Repository

We have decided to discontinue the publication of preprints on our preprint server as of 1 March 2024. The publication culture within mathematics has changed so much due to the rise of repositories such as ArXiV (www.arxiv.org) that we are encouraging all institute members to make their preprints available there. An institute's repository in its previous form is, therefore, unnecessary. The preprints published to date will remain available here, but we will not add any new preprints here.

MiS Preprint
62/2018

Computing Unit Groups of Curves

Justin Chen, Sameera Vemulapalli and Leon Zhang

Abstract

The group of units modulo constants of an affine variety over an algebraically closed field is free abelian of finite rank. Computing this group is difficult but of fundamental importance in tropical geometry, where it is desirable to realize intrinsic tropicalizations. We present practical algorithms for computing unit groups of smooth curves of low genus. Our approach is rooted in divisor theory, based on interpolation in the case of rational curves and on methods from algebraic number theory in the case of elliptic curves.

Received:
09.08.18
Published:
10.08.18
Keywords:
unit groups, intrinsic tropicalization, divisorss

Related publications

inJournal
2021 Repository Open Access
Justin Chen, Sameera Vemulapalli and Leon Zhang

Computing unit groups of curves

In: Journal of symbolic computation, 104 (2021), pp. 236-255