We know that in an EPR pair the particles are maximally entangled. each of them has 2 degrees of freedom (one bit). Tracing out the system gives the density matrix of each particle. Their Von Neumann entropy is null so we may say that two bits are encoded in the correlation. If they are loosely entangled information is encoded in the particles and in the correlation With a pure state system of 3 particles (A B C) we can trace out A and B so we find the part of in formation stored on C. Is it possible to compute the information in the correlations between A and B, B and C, C and A? Thanks.