As a guest user you are not logged in or recognized by your IP address. You have
access to the Front Matter, Abstracts, Author Index, Subject Index and the full
text of Open Access publications.
Problem of classification of the set of all entangled states is considered. Invariance of entangled states relative to the transformations from a group of symmetry of qubit space leads to classification of all states of the system through irreducible representations from that group. Excess of entropy the of a subsystem over the entropy of the whole system indicates the presence of entaglement in the system.