[Trilinos-Users] Semantics of Epetra_vector reduction operations distributed conformally with overlapping Epetra_Maps

[Alberto F. Martín-Huertas]

 Dear all,

 Assume that you have an Epetra_Map with overlapping
 GIDS defined, e.g., accordingly to the following piece of code

   num_my_elements = 3;
   if (MyPID == 0)
   {
     my_global_elements [0] = 0;
     global_values [0] = 0.0;
     my_global_elements [1] = 1;
     global_values [1] = 1.0;
     my_global_elements [2] = 2;
     global_values [2] = 2.0;
   }
   else
   {
     my_global_elements [0] = 1;
     global_values [0] = 1.0;
     my_global_elements [1] = 2;
     global_values [1] = 2.0;
     my_global_elements [2] = 3;
     global_values [2] = 3.0;
   }

   Epetra_Map mapeb ( -1,
                      num_my_elements,
                      my_global_elements, 0, Comm);

 and an Epetra_Vector v, distributed conformally with mapeb, i.e.,

   Epetra_Vector v ( View, mapeb, global_values ) ;

 How are the semantics of vector reduction operations
 like, e.g., Norm2, or Norm1, defined for vectors with their
 distribution defined accordingly to overlapping maps ?

 Thanks in advance.

 Best regards,
  Alberto.