Infinite Degree Polynomials: Describing by Roots

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SUMMARY

The discussion centers on the feasibility of describing infinite degree polynomials by their roots, analogous to finite degree polynomials. It establishes that not all infinite degree polynomials possess roots, citing the power series representation of e^x as an example. However, it suggests that certain power series, such as the one for sin(x), may be described using their roots through infinite products. The conversation references the general factorization theorem applicable to meromorphic functions, highlighting the importance of analytic continuation in this context.

PREREQUISITES
  • Understanding of power series and their representations
  • Familiarity with meromorphic functions
  • Knowledge of analytic continuation
  • Basic concepts of infinite products in mathematics
NEXT STEPS
  • Research the properties of meromorphic functions
  • Study the general factorization theorem for infinite products
  • Explore the concept of analytic continuation in complex analysis
  • Investigate the roots of power series, specifically for sin(x)
USEFUL FOR

Mathematicians, students of complex analysis, and anyone interested in the properties of infinite series and their roots.

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Homework Statement


Is it possible to describe some infinite degree polynomials by their roots in a way analagous to finite degree polynomials?


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The Attempt at a Solution



I know that, since not all infinite degree polynomials have roots (e.g. the power series representation of e^x), it would not be possible to do so for all of them. But what about polynomials like the power series of sin(x)? I was thinking maybe

\prod^\infty_{n=0} \left ( x^2 - n^2\pi^2 \right )
 
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Is it possible to describe some infinite degree polynomials...
There's no such thing as an infinite degree polynomial. I presume you mean a power series.

If (the analtyic continuation) of your power series is actually meromorphic, then there is a general factorization theorem. See:

http://en.wikipedia.org/wiki/Infinite_product
 

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