A SUFFICIENT CONDITION FOR BIJECTIVITY OF POLYNOMIAL MAPS ON THE REAL PLANE
NGUYEN VAN CHAU
Abstract
It is shown that the non-singular polynomial map $f$ of $R^2$ into itself is a global diffeomorphism of $R^2$ if $0\not\in Co\{Df(x)v\| \|x\| > Const.\}$ for a vector $v$. This result is a variant of a theorem of Olech and Meister [3, 6] for the polynomial case.