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.
Carlitz Modules and Galois Module Structure II
β Scribed by Akira Aiba
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 282 KB
- Volume
- 68
- Category
- Article
- ISSN
- 0022-314X
No coin nor oath required. For personal study only.
β¦ Synopsis
Let L#F be cyclotomic function fields of Carlitz. We show that if LΓF 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 LΓF is Carlitz Kummer.
π SIMILAR VOLUMES
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