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Geometric regularity of powers of two-dimensional squarefree monomial ideals
Journal of Algebraic Combinatorics ( IF 0.6 ) Pub Date : 2020-06-10 , DOI: 10.1007/s10801-020-00951-6
Dancheng Lu

Let I be a two-dimensional squarefree monomial ideal of a polynomial ring S. We evaluate the geometric regularity, \(a_i\)-invariants of \(S/I^n\) for \(i\ge 2\). It turns out that they are all linear functions in n from \(n=2\). Also, it is shown that \(\text{ g-reg }(S/I^n)={\text {reg}}(S/I^{(n)})\) for all \(n\ge 1\).



中文翻译:

二维无平方单项理想式的幂的几何正则性

是多项式环S的二维无平方单项式理想。我们为\(i \ ge 2 \)评估\(S / I ^ n \)的几何规则性\(a_i \)-不变量。事实证明,它们在所有线性函数ñ\(n = 2的\) 。此外,对于所有\ {n \ ge\(\ text {g-reg}(S / I ^ n)= {\ text {reg}}(S / I ^ {(n)})\)1 \)

更新日期:2020-06-10
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