Mellin Transforms of Multivariate Rational Functions
Artikel i vetenskaplig tidskrift, 2013

This paper deals with Mellin transforms of rational functions g/f in several variables. We prove that the polar set of such a Mellin transform consists of finitely many families of parallel hyperplanes, with all planes in each such family being integral translates of a specific facial hyperplane of the Newton polytope of the denominator f. The Mellin transform is naturally related to the so-called coamoeba , where Z (f) is the zero locus of f and Arg denotes the mapping that takes each coordinate to its argument. In fact, each connected component of the complement of the coamoeba gives rise to a different Mellin transform. The dependence of the Mellin transform on the coefficients of f, and the relation to the theory of A-hypergeometric functions is also discussed in the paper.

Coamoeba

Mellin transform

Hypergeometric function

hypergeometric-functions

Författare

Lisa Nilsson

Göteborgs universitet

Chalmers, Matematiska vetenskaper, Matematik

M. Passare

Stockholms universitet

Journal of Geometric Analysis

1050-6926 (ISSN)

Vol. 23 24-46

Ämneskategorier

Matematik

DOI

10.1007/s12220-011-9235-7