Re: NSolve problem
- To: mathgroup at smc.vnet.net
- Subject: [mg27580] Re: [mg27541] NSolve problem
- From: Tomas Garza <tgarza01 at prodigy.net.mx>
- Date: Wed, 7 Mar 2001 04:08:35 -0500 (EST)
- References: <200103030840.DAA23816@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
I guess the problem must be something specific to your machine. I pasted
your polynomial into my PC (Windows 98) and got the answer without a hitch.
I give you a few entries below:
In[4]:=
NSolve[poly == 0, x, 100]
Out[4]=
{{x ->
0.091708830141284216611300718350396795152370833056116265683402868621795\
46896307802}, {x ->
0.1104974690580543250922878414349811254697083774888891658465583347707092\
30}, {x ->
0.1105873420815579159995328338868055252716697659842441890265678531578872\
35}, etc.
Tomas Garza
Mexico City
----- Original Message -----
From: "AGUIRRE ESTIBALEZ Julian" <mtpagesj at lg.ehu.es>
To: mathgroup at smc.vnet.net
Subject: [mg27580] [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
>
>
- References:
- NSolve problem
- From: AGUIRRE ESTIBALEZ Julian <mtpagesj@lg.ehu.es>
- NSolve problem