Abstract:
In this paper we present integral representations for the diagonals of power series. Such representations are obtained by lowering the multiplicity of integration for the previously known integral representation. The procedure for reducing the order of integration is carried out in the framework of the Leray theory of multidimensional residues. The concept of the amoeba of a complex analytic hypersurface plays a special role in the construction of new integral representations.
Keywords:multidimensional power series, complex integral, integral representation, amoeba, Taylor series, diagonal of a power series.
UDC:517.55
Received: 29.03.2021 Received in revised form: 16.04.2021 Accepted: 20.06.2021