 Usage:  (FGNcov)=FGNcov(n,H)  
 
 Input:

  n length of vector for the calculated autocovariances  
                         
  H Hurst coefficient    
                         
 Output:

  FGNcov vector of the autocovariances  
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
