Signals in Natural Domain
Chapter 2 : Simple Operations and properties of Sequences
 
Sequence multiplication:
Let {x[n]} and  {y[n]} be two sequences, and {z[n]} be resulting sequence
                                                                  {z[n]} = {x[n]}{y[n]}

where                                                      
      z[n] =  x[n] y[n]
The notation used for this will be              {x[n]} {y[n]} = {x[n] y[n]}