1. The problem statement, all variables and given/known data Prove Sturm-Liouville differential operator is self adjoint when subjected to Dirichlet, Neumann, or mixed boundary conditions. 2. Relevant equations l = -(d/dx)[p(x)(d/dx)] + q(x) 3. The attempt at a solution I have no idea. If someone can give me a place to start that would be awesome.