RUS  ENG
Full version
JOURNALS // Sibirskii Matematicheskii Zhurnal // Archive

Sibirsk. Mat. Zh., 2009 Volume 50, Number 6, Pages 1370–1383 (Mi smj2056)

This article is cited in 11 papers

Diagonals of the Laurent series of rational functions

D. Yu. Pochekutov

Institute of Mathematics, Siberian Federal University, Krasnoyarsk

Abstract: We consider the problem of the algebraicity of diagonal series for the Laurent expansions of rational functions, geometrically identifiable using the amoeba of the denominator or an integer point in its Newton polyhedron. We give sufficient conditions for the algebraicity of diagonals basing on the theory of multidimensional residues and topological properties of the complements to collections of complex hypersurfaces in complex analytic varieties.

Keywords: diagonal, Laurent series, hyperplane amoeba, separating cycle, local residue, integral representation, algebraic function.

UDC: 517.55

Received: 05.10.2008


 English version:
Siberian Mathematical Journal, 2009, 50:6, 1081–1091

Bibliographic databases:


© Steklov Math. Inst. of RAS, 2024