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Re: mathematica gives strange result
*To*: mathgroup at smc.vnet.net
*Subject*: [mg111272] Re: mathematica gives strange result
*From*: SNC <snc at irc.pl>
*Date*: Mon, 26 Jul 2010 06:35:37 -0400 (EDT)
*References*: <i2gjom$3m$1@smc.vnet.net> <i2h86h$2hd$1@smc.vnet.net>
On 25 Lip, 13:46, "Nasser M. Abbasi" <n... at 12000.org> wrote:
> On 7/24/2010 10:57 PM, SNC wrote:
>
> > Im trying to find a solution to equation DSolve[-y''[x] +
> > ((Csc[x])^2)*y[x] == y[x]/4, y[x], x] but mathematica gives me some
> > strange result with expresion (-1+cos^2(x))^(1/4) in it. Why is that
> > and how should i interpretate this?
>
> You got back y(x), which is the solution to the diff equation?
>
> If you have initial conditions, then you can also plot y(x).
>
> Mathematica found y(x), which satisfies the ode. I assume that you know
> that a solution to an ode is a function which if substituted back into
> the ode itself, it satisfies it.
>
> I am not sure I really answered your question or not. May be it helps if
> you said what you expected to see, and why the answer returned seems to
> surprise you?
>
> --Nasser
It suprised me because the solution isn't real, i'm looking for real
one, but mathematica gives me onle this.
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