Global Euler obstruction and polar invariants
arXiv:math/0310431 · doi:10.1007/s00208-005-0681-z
Abstract
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