newbie question DSolve

*To*: mathgroup at smc.vnet.net*Subject*: [mg52066] newbie question DSolve*From*: "Pratik Desai" <pdesai1 at umbc.edu>*Date*: Tue, 9 Nov 2004 01:37:09 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

Hello all I am trying to use DSolve to solve a ode with discontinuity in it (wave equation with a viscous damper injected at a location d) This is what i am using DSolve[{y''[x]-lamda^2*y[x]==DiracDelta[x-d]*y[x],y[0]==0,y[L]== =0},y[x],x] the problem I am facing is that y[x] on the right hand side (next the delta function) varies w.r.t to the location y[x]==y[x]&& 0<=x<=d y[x]==y[L-x]&&d<=x<=L I can solve the above equation without the y[x] coupled to the delta function Please advise and thanks in advance, Pratik Desai ps: This is my third attempt at posting my query, I hope this time it makes it to the list :)