Examples of effectivity for integral points on certain curves of genus 2

Abstract

This short article concerns a method to obtain effectivity for the search of integral points on certain (sets of) curves of genus 2. More precisely, we wish to illustrate just an example of application of a criterion of Bilu, to derive effectivity for integral points on certain families of affine curves of genus 2. Future work, in collaboration with D. Lombardo, will contain details and more general applications. We shall construct morphisms from these curves to $\G_{\rm m}^2$, with image of increasing degrees. We note that as the degree increases, we may say that the examples become `more interesting', since they cannot be derived by substitution from a universal family. As a counterpart, there is the negative feature in that the relevant curves will somewhat have increasing fields of definition.