Chern Classes Of Logarithmic Vector Fields For Locally-Homogenous Free Divisors
Chern Classes Of Logarithmic Vector Fields For Locally-Homogenous Free Divisors
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局部齐次自由除数的对数向量场陈氏类
DOI:
10.4310/mrl.2018.v25.n3.a8
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发表时间:
2012
期刊:
影响因子:
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通讯作者:
X. Liao
中科院分区:
文献类型:
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作者:
X. Liao
Let $X$ be a nonsingular complex projective variety and $D$ a locally quasi-homogeneous free divisor in $X$. In this paper we study a numerical relation between the Chern class of the sheaf of logarithmic derivations on $X$ with respect to $D$, and the Chern-Schwartz-MacPherson class of the complement of $D$ in $X$. Our result confirms a conjectural formula for these classes, at least after push-forward to projective space; it proves the full form of the conjecture for locally quasi-homogeneous free divisors in $\mathbb P^n$. The result generalizes several previously known results. For example, it recovers a formula of M. Mustata and H. Schenck for Chern classes for free hyperplane arrangements. Our main tools are Riemann-Roch and the logarithmic comparison theorem of Calderon-Moreno, Castro-Jimenez, Narvaez-Macarro, and David Mond. As a subproduct of the main argument, we also obtain a schematic Bertini statement for locally quasi-homogeneous divisors.
DOI:
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发表时间:
2005
期刊:
影响因子:
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作者:
T. Nagano;T. Aikou;宮嶋 公夫;K. Miyajima;與倉 昭治
通讯作者:
與倉 昭治