On the Effective Cone of Blown-up at n + 3 Points
On the Effective Cone of Blown-up at n + 3 Points
复制标题
关于n 3 点膨胀的有效锥体
DOI:
10.1080/10586458.2015.1099060
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发表时间:
2015
影响因子:
0.5
通讯作者:
E. Postinghel
中科院分区:
文献类型:
--
作者:
M. C. Brambilla;O. Dumitrescu;E. Postinghel
We compute the facets of the effective and movable cones of divisors on the blow-up of at n+ 3 points in general position. Given any linear system of hypersurfaces of based at n+ 3 multiple points in general position, we prove that the secant varieties to the rational normal curve of degree n passing through the points, as well as their joins with linear subspaces spanned by some of the points, are cycles of the base locus and we compute their multiplicity. We conjecture that a linear system with n+ 3 points is linearly special only if it contains such subvarieties in the base locus and we give a new formula for the expected dimension.
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DOI:
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发表时间:
2014
期刊:
影响因子:
--
作者:
M. Brambilla;Olivia Dumitrescu;Elisa Postinghel
通讯作者:
Elisa Postinghel
DOI:
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发表时间:
2012
期刊:
影响因子:
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作者:
M. Brambilla;Olivia Dumitrescu;Elisa Postinghel
通讯作者:
Elisa Postinghel
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
Elisa Postinghel
通讯作者:
Elisa Postinghel
影响因子:
0.9
作者:
O. Dumitrescu;E. Postinghel
通讯作者:
E. Postinghel
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
C. D. Volder;A. Laface
通讯作者:
A. Laface