The Euclidean distance degree of smooth complex projective varieties
arXiv:1708.00024 · doi:10.2140/ant.2018.12.2005
Abstract
We obtain several formulas for the Euclidean distance degree (ED degree) of an arbitrary nonsingular variety in projective space: in terms of Chern and Segre classes, Milnor classes, Chern-Schwartz-MacPherson classes, and an extremely simple formula equating the Euclidean distance degree of X with the Euler characteristic of an open subset of X.