Polynomials constant on a hyperplane and CR maps of hyperquadrics
arXiv:0910.2673
Abstract
We prove a sharp degree bound for polynomials constant on a hyperplane with a fixed number of distinct monomials for dimensions 2 and 3. We study the connection with monomial CR maps of hyperquadrics and prove similar bounds in this setup with emphasis on the case of spheres. The results support generalizing a conjecture on the degree bounds to the more general case of hyperquadrics.
30 pages, 8 figures, to appear in Moscow Mathematical Journal