International Journal of Mathematics and Mathematical Sciences
Volume 2007 (2007), Article ID 28205, 9 pages
doi:10.1155/2007/28205
  
     
          
          λ-Rearrangements Characterization of Pringsheim Limit Points
          
            Richard F. Patterson
          
          Department of Mathematics and Statistics, University of North Florida, Building 14, Jacksonville 32224, FL, USA
          
          Abstract
Sufficient conditions are given to assure that a four-dimensional matrix A will have the property that any double sequence x with finite P-limit point has- a λ-rearrangement z such that each finite P-limit point of x is a P-limit point of Az.