# Solve an ODE problem with the right boundary condition at infinity?

GROUPS:
 I have already broken a PDE problem into an ODE problem with the method of separation of variables. But the right boundary locates at infinity. If the right boundary locates at a specific point, I think I can get an orthonormal solution system. But I don't know how to get the eigenvalues by the right boundary at infinity. Please have a look at this issue. Thanks. eq10 = p1[x] == \[Lambda]*Dp (p1^\[Prime]\[Prime])[x] // Simplify // Normal eq11 = Derivative[1][p1][lh] == \[Alpha]1 p1[lh] // Simplify // Normal eq12 = Derivative[1][p1][\[Infinity]] == 0 // Simplify // Normal