A note on discreteness of $F$-jumping numbers
A note on discreteness of $F$-jumping numbers
复制标题
关于 $F$ 跳跃数字离散性的注释
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发表时间:
2010
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影响因子:
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通讯作者:
Karl Schwede
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作者:
Karl Schwede
Suppose that $R$ is a ring essentially of finite type over a perfect field of characteristic $p > 0$ and that $a subseteq R$ is an ideal. We prove that the set of $F$-jumping numbers of $ au_b(R; a^t)$ has no limit points under the assumption that $R$ is normal and $Q$-Gorenstein -- we do emph{not} assume that the $Q$-Gorenstein index is not divisible by $p$. Furthermore, we also show that the $F$-jumping numbers of $ au_b(R; Delta, a^t)$ are discrete under the more general assumption that $K_R + Delta$ is $R$-Cartier.