Re: Re: Solve...

*To*: mathgroup at smc.vnet.net*Subject*: [mg25777] Re: [mg25747] Re: [mg25681] Solve...*From*: Reza Malek-Madani <research at nadn.navy.mil>*Date*: Sun, 22 Oct 2000 23:30:08 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

I had a similar problem; the kernel did not shut down but the definition of f was earsed. The following, however, seems to work alright: f[w_] = Together[1./(w^2) + (.9/30.)/(w - 2. Sqrt[200./10.]k)^2 - 1. - (3./30.)/(Sqrt[200./10.]k^2)]; Solve[Numerator[f[w]] == 0, w] Reza Malek-Madani Department of Mathematics Phone:410-293-2504 (FAX -2507) 589 McNair Road DSN: 281-2504 U.S. Naval Academy Nimitz Room 17 in ERC Annapolis MD 21402-5031 Email: research at usna.edu -------------------------------------------------------------------------- On Sat, 21 Oct 2000, Chris Johnson wrote: > I had the same problem. After deleting the space between the : and = in > the function definition, the Solve command caused a crash on my > system. The Kernal shut down and had to be restarted. > > I'm using v. 4.0.2 on Windows NT. > > Chris > > On Thu, 19 Oct 2000, Anesh Sooklal wrote: > > > Dear mathgroup, > > > > I have been trying to solve the following equation using Solve, > > When I type in the following line I get a message saying that an illegal > > operation has been performed. > > > > f[w_]: = 1./(w^2) + (.9/30.)/(w - 2. Sqrt[200./10.]k)^2 - 1.- > > (3./30.)/( Sqrt[200./10.]k^2 ) > > > > Solve[f[w]==0., w] > > > > Can anyone tell me what I am doing wrong. My aim is to generate a set a > > roots,w , which is a function of k. > > > > Thanking you in advance > > Aneshkumar Sooklal > > Research Assistant > > Dept. of Physics > > University of Durban-Westville > > South Africa > > > > Tel: (031) 204 4991 > > email: anesh at fermi.udw.ac.za > > > > Physics Homepage: http://fermi.udw.ac.za > > Plasma Physics Homepage: http://plasma.udw.ac.za > > > > > > > > > > >