Re: NSolve problem
- To: mathgroup at smc.vnet.net
- Subject: [mg27562] Re: [mg27541] NSolve problem
- From: "Mark Harder" <harderm at ucs.orst.edu>
- Date: Wed, 7 Mar 2001 04:08:01 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
Aguirre,
I had no such problems with my system, a Pentium III 266MHz, with 256MB
RAM, WinNT4.0. It took less than 1min. for all 39 roots to be found
(although I did not test them). I have attatched a notebook with my work (I
hope that works).
-mark harder
-----Original Message-----
From: AGUIRRE ESTIBALEZ Julian <mtpagesj at lg.ehu.es>
To: mathgroup at smc.vnet.net
Subject: [mg27562] [mg27541] NSolve problem
>Dear Group,
>
>The following computation involving finding the roots of a fairly
>"large" polynomial produces these effects on an iMac and a G4 running
>version 4.0.1.0
>
>* The kernel quits inmediatly
>* The Finder announces a type 2 or type 3 error
>* The computer hangs when quitting the frontend or restarting
>
>Before finding this problem, I have succefully solved thousands of similar
>equations. It is only this particular polynomial that produces this
>behaviour.
>
>poly =
>-379610373 +
>86108525122 x -
>9494410812843 x^2 +
>678033800618890 x^3 -
>35256637347077513 x^4 +
>1422785868781829532 x^5 -
>46379987523224586918 x^6 +
>1255110040775305672800 x^7 -
>28757943661703317295081 x^8 +
>566216540434141788242036 x^9 -
>9689635918166905495882851 x^10 +
>145419622102662664506687100 x^11 -
>1927635748101251322270468277 x^12 +
>22698320261526730755198553574 x^13 -
>238516616444064255358326013794 x^14 +
>2244844544457248209076495840902 x^15 -
>18977700242148569406030260324295 x^16 +
>144425378677250071307785407099514 x^17 -
>991008485501837267612722683739742 x^18 +
>6137577944863948353668001351379085 x^19 -
>34326439784958730341338590620522553 x^20 +
>173372427244970231511243462159022530 x^21 -
>790386259690389861011499411484727356 x^22 +
>3249150512801263497674821800877444750 x^23 -
>12025273387738045949766927419057733779 x^24 +
>39983125143255083338516711567117321554 x^25 -
>119092149085329990604796332906238009003 x^26 +
>316623088476789267411001214031813664920 x^27 -
>747964023676923486311300650584136934167 x^28 +
>1561105298212051506376403179694366814908 x^29 -
>2858356540987341736071315091852197268914 x^30 +
>4550488627005201158356170201262005359426 x^31 -
>6227602171254861022800069187941498698916 x^32 +
>7219321171308545919834020175759542752800 x^33 -
>6950806520792700621314978752272893634603 x^34 +
>5408604513390527799203743488644413596831 x^35 -
>3267975175700805824009526616434042764990 x^36 +
>1438562129094179414396635651311443079894 x^37 -
>410398690910611254706353259635396975000 x^38 +
>56948086997945333979944420780869994640 x^39;
>
>NSolve[poly==0,x,100]
>
>
>Julian Aguirre | Voice: +34 946012659
>Departamento de Matematicas | Fax: +34 944648500
>Universidad del Pais Vasco | Postal: Aptdo. 644, 48080 Bilbao, Spain
> | email: mtpagesj at lg.ehu.es
>
>
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