Predictor Corrector
      
      
        A broad class of numerical methods for solution of certain partial differential equations.
      
      
        PredictorCorrector methods proceed in two phases:
      
      
        - 
          use what you already know about the solution to predict a new, more extensive solution
        
 
        - 
          use what you know about the problem to examine your new solution and correct any evident errors in it