
doi: 10.1007/bf02571929
Let \(p(x,y)\), \(q(x,y)\) be polynomials with real or complex coefficients and let \(F=(p,q)\) be a corresponding polynomial mapping from \(\mathbb{R}^2(\mathbb{C}^2)\) to itself. We will denote by \(J(p,q)\) the Jacobian of \(F\), i.e., \[ J(p,q)= {\partial p\over\partial x} {\partial q\over\partial y}-{\partial p\over\partial y} {\partial q\over\partial x}. \] The classical Jacobian problem (conjecture) is to show that if \(J(p,q)=1\), then \(F\) is invertible. This conjecture was first posed by \textit{O. H. Keller} [Monatsh. Math. Phys. 47, 299-306 (1939; Zbl 0021.15303)] and after more than 50 years it still remains an open problem. A survey of a number of the partial results and a historical account one can find in the paper of \textit{H. Bass}, \textit{E. H. Connell} and \textit{D. Wright} [Bull. Am. Math. Soc., New Ser. 7, 287-330 (1982; Zbl 0539.13012)]. It is worth to notice that in most of the papers on the Jacobian conjecture, the authors tried to prove it and only few of them discussed the possibility of a counterexample. We want to mention the paper of \textit{A. G. Vitushkin} [Proc. int. Conf. Manifold, rel. Top. Topol., Tokyo 1973, 415-417 (1975; Zbl 0309.14010)], who presented some topological arguments in favor of a negative solution of the Jacobian conjecture. In this paper, we construct a counterexample to the so-called real Jacobian conjecture (see, for example, \textit{J. D. Randall} [Proc. Sympos. Pure Math. 40, Part 2, 411-414 (1983; Zbl 0524.26009)]), which is stronger than the classical one and asks whether a polynomial mapping \(F:\mathbb{R}^2\to\mathbb{R}^2\) with a nonvanishing Jacobian \(J(F)\) is a global diffeomorphism from \(\mathbb{R}^2\) onto \(\mathbb{R}^2\).
strong real Jacobian conjecture, Implicit function theorems, Jacobians, transformations with several variables, 510.mathematics, global diffeomorphism, counterexample, nonvanishing Jacobian, Rational and birational maps, Real polynomials: analytic properties, etc., Article, polynomial mapping, Real rational functions
strong real Jacobian conjecture, Implicit function theorems, Jacobians, transformations with several variables, 510.mathematics, global diffeomorphism, counterexample, nonvanishing Jacobian, Rational and birational maps, Real polynomials: analytic properties, etc., Article, polynomial mapping, Real rational functions
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