Colloquium

Speaker: | Professor Yifan Yang (National Chiao Tung University) |

Title: | Structure of the cuspidal rational torsion subgroup of J_1(N) |

Time: | 2008-12-11 (Thu.) 15:00 - 16:00 |

Place: | |

Abstract: | Let X_1(N) be the modular curve associated to the congruence subgroup Gamma_1(N). Its Jacobian J_1(N) contains a rational torsion subgroup coming from the cuspidal divisors of X_1(N). In this talk we will discuss the structure of this rational torsion subgroup. In particular, we will present a structure theorem for the p-primary subgroup of J_1(p^n) in the case when p is a regular prime. |

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