Mathematics / Mathematical Physics / Representation Theory / Higher Order Thinking / Differential Algebraic Equations / Mathematical Sciences / Physical sciences / Special functions / PARTIAL DIFFERENTIAL EQUATION / Wave Equation / Second Order / Port Hamiltonian system / Schrodinger equation / Three Dimensional / Bound States / Boundary Value Problem / Algebraic Variety / Mathematical Sciences / Physical sciences / Special functions / PARTIAL DIFFERENTIAL EQUATION / Wave Equation / Second Order / Port Hamiltonian system / Schrodinger equation / Three Dimensional / Bound States / Boundary Value Problem / Algebraic Variety