Dynamical systems and statistical mechanics have been developing in close interaction during the past decade, and the papers in this book attest to the productiveness of this interaction. The first paper in the collection contains a new result in the theory of quantum chaos, a burgeoning line of inquiry that combines mathematics and physics and is likely in time to produce many new connections and applications. Another paper, related to the renormalization group method for the study of maps of the circle with singularities due to a jump in the derivative, demonstrates that the fixed point of the renormgroup can be sufficiently described in this case. In certain situations, the renormgroup methods work better than the traditional KAM method.Other topics covered include thermodynamic formalism for certain infinite-dimensional dynamical systems, numerical simulation of dynamical systems with hyperbolic behavior, periodic points of holomorphic maps, the theory of random media, statistical properties of the leading eigenvalue in matrix ensembles of large dimension, spectral properties of the one-dimensional Schrodinger operator. This volume will appeal to many readers, as it covers a broad range of topics and presents a view of the some of the frontier research in the Soviet Union today.
Phase space discretization in chaotic dynamical systems by M. L. Blank $G$-consistent estimates of eigenvalues and eigenvectors of matrices by V. L. Girko Circle homeomorphisms with weak discontinuities by K. M. Khanin and E. B. Vul Multidimensional KAM theory from the renormalization group viewpoint by D. V. Kosygin Symmetries on a Julia set by G. M. Levin Renormalization group and renormalization theory in p-adic and adelic scalar models by M. D. Missarov Space-time chaos in chains of weakly interacting hyperbolic mappings by Ya. B. Pesin and Ya. G. Sinai Poisson distribution in a geometric problem by Ya. G. Sinai Singular spectral properties of a one-dimensional Schrodinger operator with almost periodic potential by S. Ya. Zhitomirskaya.