А.А. Аграчев, Топология квадратичных отображений и гессианы гладких отображений

Title: Topology of quadratic mappings and Hessians of smooth mappings
Authors: A.A. Agrachev
Journal title: Journal of Soviet Mathematics
Year: 1990
Issue: 3
Volume: 49
Pages: 990–1013
Citation:

A. A. Agrachev, “The topology of quadratic mappings and Hessians of smooth mappings”, Journal of Soviet Mathematics, 1990, 49:3, 990–1013

Abstract:

In this paper we study sets of real solutions of systems of quadric equations and inequalities. The results are used for the local study of more general systems of smooth equations and inequalities.