Second-order ODE eigenvalue problem (py')' + qy + λwy = 0 on [a,b] with homogeneous boundary conditions; eigenvalues are real, countable, and eigenfunctions form an orthogonal basis of L²(w).
Second-order ODE eigenvalue problem (py')' + qy + λwy = 0 on [a,b] with homogeneous boundary conditions; eigenvalues are real, countable, and eigenfunctions form an orthogonal basis of L²(w).