A Plücker formula for singular projective varieties
A Plücker formula for singular projective varieties
复制标题
奇异射影簇的普吕克公式
DOI:
10.1080/00927879708826029
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发表时间:
1997
影响因子:
0.7
通讯作者:
Lars Ernström
中科院分区:
文献类型:
--
作者:
Lars Ernström
We prove a Plucker formula,for a projective variety X with arbitrary singularities, which expresses the class of X, the degree of the dual variety, in terms of Euler characteristics of X and of two linear sections of X. Moreover, we show that there is no formula whatsoever expressing this degree as a difference of two terms, a deformation invariant and a correction for singularities.