complex roots

Thread View: sci.math.num-analysis

2 messages

[T] Back to Threads [V] Tree View [G] Group Articles

2 total messages Started by Mark J. Encarnacion Tue, 06 Oct 1992 17:25

#785

Author: Mark J. Encarnacion
Date: Tue, 06 Oct 1992 17:25

9 lines
981 bytes

Given a polynomial of degree n with complex coefficients, I need to compute
all n complex roots (multiple or otherwise) of this polynomials.  I tried
the code given in Numerical Recipes in C, pp. 280-282, which is supposed to
be a sure-fire technique.  However, for some polynomials (e.g. x^3 - 1) I get
wrong results.  Is it known that this code contains bugs?  If not, I must be
doing something wrong, although I used the code verbatim.  Any advice that will
help me write a C program that works will be appreciated.
Thanks,
Mark

Re: complex roots

#634

Author: akyildiz
Date: Wed, 14 Oct 1992 15:34

10 lines
1135 bytes

In article <19921006.182543728139.NETNEWS@ALIJKU11>, mencarna@risc.uni-linz.ac.at (Mark J. Encarnacion) writes:
> Given a polynomial of degree n with complex coefficients, I need to compute
> all n complex roots (multiple or otherwise) of this polynomials.  I tried
> the code given in Numerical Recipes in C, pp. 280-282, which is supposed to
> be a sure-fire technique.  However, for some polynomials (e.g. x^3 - 1) I get
> wrong results.  Is it known that this code contains bugs?  If not, I must be
> doing something wrong, although I used the code verbatim.  Any advice that will
> help me write a C program that works will be appreciated.
> Thanks,
> Mark

Thread Navigation

This is a paginated view of messages in the thread with full content displayed inline.

Messages are displayed in chronological order, with the original post highlighted in green.

Use pagination controls to navigate through all messages in large threads.

Back to All Threads