Real roots of polynomials
- To: mathgroup at smc.vnet.net
- Subject: [mg24688] Real roots of polynomials
- From: Jack Goldberg <jackgold at math.lsa.umich.edu>
- Date: Fri, 4 Aug 2000 01:19:10 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Suppose Pn[x] is a polynomial of degree n in x. Its coefficients
Question: What is a good way of determining the real roots of Pn
and their multiplicities?
Use NSolve and "cast out" the complex roots and Chop any
roots with a "too" small imaginary part (in case NSolve
inserts spurious imaginary parts).
In cases where n is large and the number of real roots is small
compared to n, one can imagine that better methods exist. I have
searched MathSource with no real (pun intended) progress. Possibly
this is more a math question than a Mathematica question.
Help is appreciated.
Prev by Date:
Re: running mathematica remotely
Next by Date:
Re: Can I solve PDE in Mathematica?
Previous by thread:
Re: Simple Query
Next by thread:
Re: Real roots of polynomials