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Mar 19, 2016 at 6:54 comment added naf The stable reduction of all $X(p)$ has been worked out by Bouw and Wewers in their paper "Stable reduction of modular curves". In particular, it also follows from their results that $X(13)$ does not have potentially good reduction.
Mar 18, 2016 at 13:57 vote accept Will Sawin
Mar 17, 2016 at 20:58 answer added Ariyan Javanpeykar timeline score: 12
Mar 17, 2016 at 19:55 answer added Michael Stoll timeline score: 15
Mar 17, 2016 at 5:51 history edited Will Sawin CC BY-SA 3.0
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Mar 16, 2016 at 19:02 answer added znt timeline score: 9
Mar 16, 2016 at 18:48 comment added François Brunault The Jacobian $J(13)$ admits as a factor $J_0(169)^+$, which is a 3-dimensional variety isogenous to $A_f$, where $f \in S_2(\Gamma_0(169))^+$ is a newform with coefficients in $\mathbf{Q}(\zeta_7)^+$. Does this $A_f$ have potential good reduction at $13$?
Mar 16, 2016 at 16:03 history asked Will Sawin CC BY-SA 3.0