n-1
FUNCTION :  qseries[aqprod] - the product (1-a)(1-aq)..(1-aq   )
    
CALLING SEQUENCE :  aqprod(a,q,n);
    
PARAMETERS :   a,q - names
               n   - positive integer
   
SYNOPSIS :   
   
 aqprod(a,q,n) returns the product                                      
   
                                                n-1
             (a)  =  (a;q)  = (1-a)(1-aq)..(1-aq   ),
                n         n   
 where n is a given positive integer. Here a and q are names, variables,
 or constants. If n=0 then 1 is returned. 
   
EXAMPLES :   
   
> aqprod(q,q,6);
 
                            2        3        4        5        6
              (1 - q) (1 - q ) (1 - q ) (1 - q ) (1 - q ) (1 - q )
   
> aqprod(z,q,3);
 
                                                    2
                          (1 - z) (1 - z q) (1 - z q )
    
SEE  ALSO :