  and \(H(\bB,\psi)\) similarly in terms of the probability distribution  \(\abs{\braket{b_j}{\psi}}^2\) for a complete set of eigenstates \(\ket{b_j}\), (\(j =1, \ldots, n\)) of observable \(\bB\). Then we obtain the uncertainty relation (Maassen and Uffink 1988):