Geodesic
Remarks About Morphisms on an Algebraic Curve
Bollettino della Unione matematica italiana, Série 9, Tome 3 (2010) no. 3, pp. 505-519.

Voir la notice de l'article provenant de la source Biblioteca Digitale Italiana di Matematica

In a previous paper we described the collection of homological equivalence relations on a curve of genus $\ge 2$ as the set of integral solutions of certain algebraic equations. In the present paper we improve one argument of the previous paper, and we study the equations more closely for a curve of genus 2. 
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Guerra, Lucio. Remarks About Morphisms on an Algebraic Curve. Bollettino della Unione matematica italiana, Série 9, Tome 3 (2010) no. 3, pp. 505-519. http://geodesic.mathdoc.fr/item/BUMI_2010_9_3_3_a5/

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