Łojasiewicz inequality at infinity for a pair of polynomials and some applications
Tom 285 / 2025
Studia Mathematica 285 (2025), 145-181
MSC: Primary 26D15; Secondary 14P10, 52B20
DOI: 10.4064/sm241017-15-7
Opublikowany online: 28 October 2025
Streszczenie
Let $P,Q: \mathbb R^n \rightarrow \mathbb R$ be two polynomials. This paper studies the existence of the following Łojasiewicz inequality at infinity: $$|Q(x)|^{\theta} \ge c|P(x)| \quad\ {\rm for}\ \|x\| \gg 1,$$ where $c$ and $\theta $ are positive constants. We provide a condition under which the Łojasiewicz inequality holds, and the exponent is computed explicitly in terms of the Newton polyhedra of the two polynomials. On the way, we give some criteria for the convergence of some integrals of rational functions, and describe the domain of convergence of multidimensional Dirichlet series associated with polynomials in terms of Newton polyhedra of polynomials defining the series.
