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Re: mathematica gives strange result

  • To: mathgroup at smc.vnet.net
  • Subject: [mg111266] Re: mathematica gives strange result
  • From: "Nasser M. Abbasi" <nma at 12000.org>
  • Date: Sun, 25 Jul 2010 07:46:19 -0400 (EDT)
  • References: <i2gjom$3m$1@smc.vnet.net>
  • Reply-to: nma at 12000.org

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



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