Nonautonomous oscillators and coefficient evaluation for orthogonal function systems
          Ferreira, J.M.; Pinelas, Sandra; Ruffing, A.  
          
          Journal of Difference Equations and Applications , 15(11-12) (2009), 1117-1133  
          http://dx.doi.org/10.1080/10236190902877764  
           
          The analytic behaviour of classical and difference versions of Hermite polynomials is investigated from two different viewpoints: first using oscillation theory which is important in quantum oscillator systems and second using a factorization method which may serve as a stable numerical investigation of the function systems under investigation. The resulting polynomial systems are basically of type unbounded orthogonal polynomial systems.  
         |