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