Stable Model of X_0(125)
arXiv:math/0403157
Abstract
In this paper we determine the components in the stable model of X_0(125) over C_5 by constructing in rigid-analytic terminology an explicit semi-stable covering. We then offer empirical data regarding the placement of certain CM j-invariants in the supersingular disk of X(1)/C_5 which suggests a moduli-theoretic interpretation of the components in the stable model. The paper then concludes with a conjecture regarding the stable model of X_0(p^3) for p>3, which is as yet unknown.
5 figures