... Q ( CC , ) || , D = i k = 1 C i = 1 Ź || ( CC , 1 ) - ( CC ) || ( 16 ) -k ... [ 6 ] . So , clustering with small S and large D has optimal c . c = arg min r = arg min . CE { 2,3 , ... , Cn } ( 17 ) 4.2 Label ... max { μ1k } ie { 1,2 , .. , c } k ...