Class invariants for quartic CM fields
数论
2007-05-23 v2 代数几何
摘要
One can define class invariants for a quartic primitive CM field K as special values of certain Siegel (or Hilbert) modular functions at CM points corresponding to K. We provide explicit bounds on the primes appearing in the denominators of these algebraic numbers. This allows us, in particular, to construct S-units in certain abelian extensions of K, where S is effectively determined by K. It also yields class polynomials for primitive quartic CM fields whose coefficients are S-integers.
引用
@article{arxiv.math/0404378,
title = {Class invariants for quartic CM fields},
author = {Eyal Z. Goren and Kristin E. Lauter},
journal= {arXiv preprint arXiv:math/0404378},
year = {2007}
}
备注
14 pages