Characteristic classes of discriminants and enumerative geometry
作者:
Paolo Aluffi,
期刊:
Communications in Algebra
(Taylor Available online 1998)
卷期:
Volume 26,
issue 10
页码: 3165-3193
ISSN:0092-7872
年代: 1998
DOI:10.1080/00927879808826335
出版商: Gordon and Breach Science Publishers Ltd.
数据来源: Taylor
摘要:
We compute the Euler obstruction and Mather’s Chern class of the discriminant hypersurface of a very ample linear system on a nonsingular variety. Comparing the codimension-1 and 2 terms of this and other characteristic classes of the discriminant leads to a quick computation of the degrees of the loci of cuspidal and binodal sections of a very ample line bundle on a smooth variety, and of the, tacnodal locus for linear systems on a surface. We also compute explicitly all terms in the Schwartz-MacPherson’s classes of strata of the discriminant in the P9of of cubic plane curves, and of the discriminant of∣O(d)∣ on P1.
点击下载:
PDF (822KB)
返 回