Containments of symbolic powers of ideals of generic points in $PP^3$

Containments of symbolic powers of ideals of generic points in $PP^3$
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$PP^3$ 中泛型点理想的符号幂的包含

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发表时间:
2012
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通讯作者:
M. Dumnicki
M. Dumnicki
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作者:
M. Dumnicki

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证明了Harbourne和Huneke的猜想,$I^{(Nr-(N-1))}子集M^{(r-1)(N-1)}I^{r}$对$PP ^3 $中的一般(单)点的理想成立.因此,对于这样的理想,我们证明了如下的界,它可以被认为是Chudnovsky界的推广:$alpha(I^{(3 m-k)})geq malpha(I)+2 m-k $,对任意$m geq 1$和$k= 0,1,2 $.此外,我们得到了这样的理想的Waldshirt常数的下界。
We show that the Conjecture of Harbourne and Huneke, $I^{(Nr-(N-1))} subset M^{(r-1)(N-1)}I^{r}$ holds for ideals of generic (simple) points in $PP^3$. As a result, for such ideals we prove the following bounds, which can be recognized as generalizations of Chudnovsky bounds: $alpha(I^{(3m-k)}) geq malpha(I)+2m-k$, for any $m geq 1$ and $k=0,1,2$. Moreover, we obtain lower bounds for the Waldshmidt constant for such ideals.