Omschrijving
The authors develop a degree theory for compact immersed hypersurfaces of prescribed $K$-curvature immersed in a compact, orientable Riemannian manifold, where $K$ is any elliptic curvature function. They apply this theory to count the (algebraic) number of immersed hyperspheres in various cases.
Harold Rosenberg, IMPA, Rio de Janeiro, Brazil.
Graham Smith, Centre de Recerca Matematica, Barcelona, Spain.