Galois Module Structure and Elliptic Functions
โ Scribed by W. Bley
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 669 KB
- Volume
- 52
- Category
- Article
- ISSN
- 0022-314X
No coin nor oath required. For personal study only.
โฆ Synopsis
Let (K) be a quadratic imaginary number field and (R_{f}) the ring class field modulo (f) over (K, f \in \mathbb{N}). Let (\theta_{f}) denote the order of conductor (f) in (K) and let (\mathfrak{g}^{}, \mathrm{~g}) be proper O (\gamma)-ideals such that (\mathbf{g}^{ 2} \subseteq \mathbf{g} \subseteq \mathrm{g}^{*}). Let (\tau) denote the Weber function and let I denote an auxiliary (\mathcal{C}{f})-ideal. For certain extensions (R{f}(\tau(1 \mid \lg )) / R_{f}(\tau(1 \mid \lg ))) it is shown that the ring of integers in (R_{f}(\tau(1 \mid \lg ))) is a free rank one module over the associated order of (R_{f}(\tau(1 \mid \lg )) / R_{f}\left(\tau\left(1 \mid \mathfrak{l g}^{}\right)\right)). 1995 Academic Press, Inc.
๐ SIMILAR VOLUMES
Let k be a one variable rational function field over a finite field. We construct an example of a wildly ramified abelian extension over k, whose integer ring is not free over its associated order.
Let L#F be cyclotomic function fields of Carlitz. We show that if LรF is Carlitz Kummer, the integer ring O L is free over the associated order as in the classical cyclotomic Kummer extension. However, contrary to the characteristic zero case, O L is not free unless LรF is Carlitz Kummer.