Multitoric surfaces and Euler obstruction of a function
In this paper a formula is given for the Euler obstruction of a function, introduced by Brasselet, Massey, Parameswaran and Seade, for nondegenerate functions on multitoric surfaces. A reducible surface is multitoric, if each irreducible component is a toric surface with torus action induced by a torus action on the ambient space. As application the authors study functions on three classes of reducible determinantal varieties, which are multitoric.
scientific article; zbMATH DE number 6647109
scientific article