Аннотация:The joint distribution P of random variables η(1) ,···,η(n) uniquely
determines the conditional distribution P(i) of each η(i) with respect
to {η(j);1≤j≤n,j≠i}·When does the family P(1) ,···,P(n), in its turn,
determine P? Or, more generally, what is the set of all joint
distributions P with given P(1),···,P(n)? We answer these questions
under some general assumptions.