Re: Differential Equations
- To: mathgroup at yoda.physics.unc.edu
- Subject: Re: Differential Equations
- From: news at murdoch.acc.virginia.edu
- Date: Mon, 1 Jun 92 09:28:32 EDT
>From: rkn3u at kelvin.seas.Virginia.EDU (Richard Keith Norwood) >Subject: Differential Equations >Message-ID: <1992Jun1.132828.23261 at murdoch.acc.Virginia.EDU> >Sender: usenet at murdoch.acc.Virginia.EDU >Organization: University of Virginia >Date: Mon, 1 Jun 1992 13:28:28 GMT I'm trying to solve a find the eigenvalues and eigenfunctions of a linear pde (4th order in space and 2nd order in time) using Mathematica. Applying the separation method, I get two ode's - one 2nd order in time and the other 4th order in space. I figure that I can use DSolve to solve the 4th order ode for 3 of the 4 boundary conditions. This should leave an expression with one arbitrary constant. I can then solve this expression for the eigenvalues subject to the 4th boundary condition. The problem is that Mathematica returns the trivial solution of zero when I try solving for 4th order ode and any 3 boundary conditions. Am I overlooking something? I appreciate any comments or clues. Keith