Title: Quadratic maps and smooth vector-valued functions: Euler characteristics of level sets
Authors: A.A. Agrachev, R.V. Gamkrelidze
Journal title: Journal of Soviet Mathematics
Year: 1991
Volume: 55
Pages: 1892–1928
Citation:
A. A. Agrachev, R. V. Gamkrelidze, “Quadratic mappings and smooth vector functions: Euler characteristics of level sets”, Journal of Soviet Mathematics, 1991, 55:4, 1892–1928
Abstract:
Quadratic maps of into are studied. Explicit expressions are obtained for the Euler characteristics of level sets of such maps. The Euler characteristics of level sets of smooth vector-valued functions are also evaluated in terms of their values at critical points.
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