摘要翻译:
设$\{p_i\}_{1\leq i\leq r}$和$\{q_i\}_{1\leq i\leq r}$是域$k$上的两个Brauer Severi曲面(即圆锥曲线)集合。我们证明了$P_i的$in$br(k)$生成的子组与$q_i的$\iff$\pi P_i$生成的子组是相同的,与$\pi q_i$是双生的。此外,在本例中,$\pi p_i$和$\pi q_i$表示$m(k)$中的同一个类,$k$-varietics的Grothendieck环。如果$char(k)=0$,则相反。上面的一些含义也适用于一般的诺以太基础方案。
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英文标题:
《Products of Brauer Severi surfaces》
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作者:
Amit Hogadi
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最新提交年份:
2007
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分类信息:
一级分类:Mathematics 数学
二级分类:Algebraic Geometry 代数几何
分类描述:Algebraic varieties, stacks, sheaves, schemes, moduli spaces, complex geometry, quantum cohomology
代数簇,叠,束,格式,模空间,复几何,量子上同调
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英文摘要:
Let $\{P_i\}_{1 \leq i \leq r}$ and $\{Q_i\}_{1 \leq i \leq r}$ be two collections of Brauer Severi surfaces (resp. conics) over a field $k$. We show that the subgroup generated by the $P_i's$ in $Br(k)$ is the same as the subgroup generated by the $Q_i's$ \iff $\Pi P_i $ is birational to $\Pi Q_i$. Moreover in this case $\Pi P_i$ and $\Pi Q_i$ represent the same class in $M(k)$, the Grothendieck ring of $k$-varieties. The converse holds if $char(k)=0$. Some of the above implications also hold over a general noetherian base scheme.
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PDF链接:
https://arxiv.org/pdf/0706.3447