Borisov I. S.,  Vorozheikin I. S.
          Accuracy of approximation in the Poisson theorem in terms of the χ{2}-distance
        We study the limit behavior of the χ{2}-distance between the distributions of the nth partial sum of  independent not necessarily identically distributed Bernoulli random variables  and the accompanying Poisson law. As a consequence in the i.i.d. case we make  the multiplicative constant preciser in the available upper bound for the rate  of convergence in the Poisson limit theorem.