arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1003.1869math.NT
收藏

具有给定二次预解式的三次扩张的计数

Counting Cubic Extensions with given Quadratic Resolvent

Henri Cohen, Anna Morra

摘要:

给定数域$k$和二次扩张$K_2$,我们给出了以$K_2$为二次子扩张的Galois闭包的$k$的三次扩张的同构类的个数的显式渐近公式,这些同构类按它们的判别理想的范数排序.主要工具是库默尔理论。我们还详细研究了渐近的误差项,并表明它是$O(X^α)$,一个明确的$α<1$。

英文摘要:

Given a number field $k$ and a quadratic extension $K_2$, we give an explicit asymptotic formula for the number of isomorphism classes of cubic extensions of $k$ whose Galois closure contains $K_2$ as quadratic subextension, ordered by the norm of their relative discriminant ideal. The main tool is Kummer theory. We also study in detail the error term of the asymptotics and show that it is $O(X^α)$, for an explicit $α<1$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑