Re: DSolve
- To: mathgroup at smc.vnet.net
- Subject: [mg83294] Re: DSolve
- From: "Kevin J. McCann" <Kevin.McCann at umbc.edu>
- Date: Sat, 17 Nov 2007 05:14:19 -0500 (EST)
- Organization: University System of Maryland
- References: <fhc3n2$4vv$1@smc.vnet.net>
Well, first off, u[x]=0 is indeed a solution, which is obvious. You
could try replacing the boundary conditions with variables rather
setting both to zero if you want to see the general solution.
Kevin
Raj wrote:
> eqn = D[u[x], {x, 2}] + \[Lambda]^2 (0.25 - x^2) u[x] == 0
> DSolve[{eqn, u[-1/2] == 0, u[1/2] == 0}, u[x], x]
>
> This returns {{u[x] -> 0}} while another CAS system returns a solution
> in terms of WhittakerW function.
>
> Am I doing something wrong or is Mathematica not able to solve this
> equation symbolically?
>
> Thanks,
>
> Raj
>
>
--
Kevin J. McCann
Research Associate Professor
JCET/Physics
Physics Building
University of Maryland, Baltimore County
1000 Hilltop Circle
Baltimore, MD 21250