Semistable reduction conjecture for abelian varieties and dynamical systems
Semistable reduction conjecture for abelian varieties and dynamical systems
Let be a complete discretely valued field. An extension is weakly totally ramified if it is separable and has the relevant ramification property while preserving the residue field. Let be an abelian variety, and let be a dynamical system of degree . Semistable reduction conjecture. There is a separable weakly totally ramified extension and a model for that admits semistable reduction; likewise, there is such an extension and a model for that admits semistable reduction. The preceding discussion explains that Ramified Approximation provides this kind of result for elliptic curves and dynamical systems on , while extensions to general abelian varieties and dynamical systems on higher-dimensional projective space are unclear; the quasi-finite residue-field case offers some partial motivation but does not establish the assertions.
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Primary source
Xander Faber, “Ramified Approximation and Semistable Reduction”, arXiv:2407.12089 (2025).
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