Abstract
The local Euler obstruction was first introduced by R. MacPherson in [117] as an ingredient for the construction of characteristic classes of singular complex algebraic varieties. An equivalent definition was given by J.-P. Brasselet and M.-H. Schwartz in [33] using vector fields. Their viewpoint brings the local Euler obstruction into the framework of “indices of vector fields on singular varieties,” though the definition only considers radial vector fields. This approach is most convenient for our study which is based on [29, 32] and shows relations with other indices. There are various other definitions and interpretations, in particular due to Gonzalez-Sprinberg, Verdier, Le-Teissier and others. The survey [27] provides an overview on the subject.
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