FUNCTION :  ETA[qetacombo] -  q-expansion of a symbolic linear combo of eta-products

CALLING SEQUENCE :  qetacombo()
                    qetacombo(etacombo,TT)
                    qetacombo(etacombo,TT,BB)

PARAMETERS : 
   etacombo - lin combo of eta-products                      
         TT - positive integer                                     
         BB - nonnegative integer (default = 0)                    
                  -            

GLOBAL VARIABLES : consL

SYNOPSIS :   
   Compute q-expansions of etacombo up to q^TT   
   Increase BB if not enough terms               

EXAMPLES :   

> with(ETA):
> qetacombo();
-------------------------------------------------------------
qetacombo()                                
qetacombo(etacombo,TT)                                
qetacombo(etacombo,TT,BB)                                
   etacombo = lin combo of eta-products                      
   TT = positive integer                                     
   BB = nonnegative integer (default = 0)                    
                                                             
   Compute q-expansions of etacombo up to q^TT   
   Increase BB if not enough terms               
-------------------------------------------------------------
> gpP:=[1,2,3,-2]: gpQ:=[2,2,6,-2]:
> P:=gp2etaprod(gpP):
> Q:=gp2etaprod(gpQ):
> ETAid:=P*Q+9/P/Q - (Q/P)^3 - (P/Q)^3:
> ETAidn:=etanormalid(%):
> f1:=op(2,ETAidn)/9:
> f2:=-op(3,ETAidn):
> f3:=-op(4,ETAidn):
> qetacombo(1+9*f1-f2-f3,100);
                                       0


DISCUSSION :

SEE ALSO :