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arXiv 0906.5216math.NTmath.AG
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F_q上代数函数域中零因子的存在性

On the existence of dimension zero divisors in algebraic function fields defined over F_q

Stephane Ballet, Christophe Ritzenthaler, Robert Rolland

摘要:

设F/F_q是定义在有限域F_q上亏格为g的代数函数域。得到了F中g-k次维数零因子的存在性、个数和密度的新结果,其中k是正整数.特别地,当q= 2,3时,我们证明了总存在一个度为γ-1的维数零因子,其中γ是F的q秩.我们还利用超椭圆域F的Zeta函数给出了超椭圆域F存在g-k次维数零因子的一个充要条件.

英文摘要:

Let F/F_q be an algebraic function field of genus g defined over a finite field F_q. We obtain new results on the existence, the number and the density of dimension zero divisors of degree g-k in F where k is a positive integer. In particular, for q=2,3 we prove that there always exists a dimension zero divisor of degree γ-1 where γis the q-rank of F. We also give a necessary and sufficient condition for the existence of a dimension zero divisor of degree g-k for a hyperelliptic field F in terms of its Zeta function.

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。

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