Re: How to use "Solve" to get only real number solutions?
- To: mathgroup at smc.vnet.net
- Subject: [mg55154] Re: How to use "Solve" to get only real number solutions?
- From: foice <NONfoiceSPAMMARE at tiscalinet.it>
- Date: Mon, 14 Mar 2005 04:28:35 -0500 (EST)
- References: <d114lb$e18$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
On Sun, 13 Mar 2005 10:28:59 +0000 (UTC), "PengYu.UT at gmail.com" <PengYu.UT at gmail.com> wrote: >Hi All > >For example I have the following function and I want to find the >solution of the quation shown below. But Mathematica showns not only >real number solutions. Do you know how to restrict the solutions to >only real numbers. Thanks! > >Best wishes, >Peng > >intensity[x_, δ_, p_, λ_] := 1/4 + (2*Cos[(Pi*x)/100])/Pi + >(4*Cos[(Pi*x)/100]^2)/Pi^2 - (2*Cos[(3*Pi*x)/100])/(3*Pi) - > (8*Cos[(Pi*x)/100]*Cos[(3*Pi*x)/100])/(3*Pi^2) + >(4*Cos[(3*Pi*x)/100]^2)/(9*Pi^2) > >Solve[intensity[x, 0, 200, 50] == 0.3*(1/4 + 32/(9*Pi^2) + >(4*Sqrt[2])/(3*Pi)), x] There's a package in the misc category called RealOnly. It get out real results or a generical "NonReal". Bye ------------------------------------------------------------- tutto ciò che ho scritto è sempre In My Humble Opinion (IMHO) probabilmente l'ho scritto di fretta, quindi scusate se sono stato sbrigativo.