 Usage:  covci =fncovci(f,covu,om,c,di,ord,rk)  
 
 Input:

  f                      matrix, 
                         
  covu                   matrix, covariance 
                         
  om                     matrix, 
                         
  c                      vector, 
                         
  di                     integer, dimension of time series 
                         
  ord                    integer, order of series 
                         
  rk                     integer, rank of matrix (dimension-cointegration rank) 
                         
 Output:

  covci                  matrix, covariance matrix 
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
