Interlacing of Hurwitz series

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In this paper, we introduce the notion of interlacing of Hurwitz series. We begin by reviewing some important properties of the ring of Hurwitz series over a commutative ring A of arbitrary characteristic, and we introduce and investigate properties of the maps exp and log. We show that solutions of linear homogeneous differential equations with constant coefficients from the ring A can be described simply as interlacings of solutions of a first order system of differential equations. We give several examples to illustrate this result, and we conclude by defining and investigating properties of trigonometric functions using interlacings of Hurwitz series.

Original languageEnglish (US)
Pages (from-to)2163-2185
Number of pages23
JournalCommunications in Algebra
Issue number5
StatePublished - May 4 2017

All Science Journal Classification (ASJC) codes

  • Algebra and Number Theory


  • Exp
  • hurwitz series
  • interlacing
  • log


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