“…It is quite interesting that, generally, V CRF (r) P (ρ) = V CRF (s) M −P (ρ) unless they both vanish, this means that the above two degrees of the difficulties can be different. In addition, it is known that if ρ is (r) P − (s) M−P -inseparability, then there must be the so-called partial entanglement [4,6]. What a pity, an entanglement measure, generally, should be in form as a Neumann entropy and it must at least obey some limits [11], however V (r) P (s) M −P (ρ) has no these properties, so we cannot taken it as a measure of the partial entanglement.…”