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Eigenvector mystery
10-24-2020, 02:03 PM
Post: #15
RE: Eigenvector mystery
Thanks everyone for the enlightening explanations, though most of the material is above my level of mathematical knowledge. Sad

I was reading Valentin's excellent article "Boldly Going - Eigenvalues and Friends" and that led me to another somewhat off-topic question.

The HP 50g command PCAR (characteristic polynomial) returns a polynomial in symbolic form, e.g.

'X^5-19*X^4+79*X^3+146*X^2-1153*X+1222'

Is there a command to convert this symbolic polynomial form to an array as would be returned by Valentin's PCHAR program? Related commands such as PROOT and PCOEF require their arguments as an array.

One could write a program to do the conversion by string processing but it would be messy.
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Messages In This Thread
Eigenvector mystery - John Keith - 10-18-2020, 09:31 PM
RE: Eigenvector mystery - pinkman - 10-18-2020, 10:54 PM
RE: Eigenvector mystery - JurgenRo - 10-19-2020, 06:33 PM
RE: Eigenvector mystery - Albert Chan - 10-19-2020, 07:13 PM
RE: Eigenvector mystery - Thomas Okken - 10-19-2020, 07:19 PM
RE: Eigenvector mystery - JurgenRo - 10-19-2020, 07:35 PM
RE: Eigenvector mystery - JurgenRo - 10-19-2020, 07:26 PM
RE: Eigenvector mystery - pinkman - 10-19-2020, 08:57 PM
RE: Eigenvector mystery - Thomas Okken - 10-19-2020, 09:42 PM
RE: Eigenvector mystery - Valentin Albillo - 10-20-2020, 12:08 AM
RE: Eigenvector mystery - JurgenRo - 10-21-2020, 06:57 PM
RE: Eigenvector mystery - JurgenRo - 10-21-2020, 06:58 PM
RE: Eigenvector mystery - Albert Chan - 10-18-2020, 11:58 PM
RE: Eigenvector mystery - John Keith - 10-24-2020 02:03 PM
RE: Eigenvector mystery - Albert Chan - 10-26-2020, 04:25 PM
RE: Eigenvector mystery - John Keith - 10-27-2020, 12:37 PM



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