Cheryl Grood

          Associate Professor of Mathematics                                                     
          Chair, Division of Natural Sciences and Engineering
          Science Center, Office 147                                       
          Department of Mathematics and Statistics                      
          Swarthmore College                                                      
          Swarthmore, PA  19081                                               
          (610)690-6860                                                            
          Email: cgrood1 "at" swarthmore.edu