Global Euler obstruction and polar invariants

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For an affine complex algebraic singular space Y, we define a global Euler obstruction Eu(Y) which extends the Euler-Poincare characteristic of a nonsingular Y. Using Lefschetz pencils, we express Eu(Y) as alternating sum of global polar invariants.
9 pages, 1 figure

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Algebraic Geometry, Complex Variables, 32S20; 14C17; 57R20; 32S65

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http://salesiana.dossiersoluciones.com/handle/123456789/96812

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0310431
 http://arxiv.org/abs/math/0310431
 Math Ann 333 (2005), no 2, 393-403
 doi:10.1007/s00208-005-0681-z

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arXiv