Article ID Journal Published Year Pages File Type
4594480 Journal of Number Theory 2013 10 Pages PDF
Abstract

The Hadamard product of two power series ∑anzn and ∑bnzn is the power series ∑anbnzn. We define the (Hadamard) grade of a power series A to be the least number (finite or infinite) of algebraic power series, the Hadamard product of which equals A. We study and discuss this notion.

Related Topics
Physical Sciences and Engineering Mathematics Algebra and Number Theory