 Usage:  y = eigsm (x)  
 
 Input:

  x                      p x p matrix 
                         
 Output:

  y.values               p x 1 vector with the eigenvalues 
                         
  y.vectors              p x p matrix with the normalized eigenvectors 
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
