FUNCTION :  eta[etaprodWe] - Computes that action of W_e on a given etaproduct
                             where  W_e is an Atkin-Lehner involution of GAMMA_0(N).

                

CALLING SEQUENCE :  etaprodWe(etaprod,W,ee,N) 
                    

PARAMETERS :      -  
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GLOBAL VARIABLES : 

SYNOPSIS :   
   

EXAMPLES :   

DISCUSSION :

SEE ALSO :