Semi-infinite cohomology of quantum groups. II;Symmetry groups of regular polyhedra over finite fields;Coordinate ring of the quantum Grassmannian and intertwiners for the representations of Sklyanin algebras;Vector bundles on an elliptic curve and Sklyanin algebras;The singular supports of IC sheaves on spaces of quasimaps are irreducible;Cohomology of the Lie algebras of differential operators: Lifting formulas;On a higher analog of the linking number of two curves;Topological complexity of ^2 bundles over the circle;Tutte decomposition for graphs, weighted graphs, and symmetric matrices;Homology isomorphism of the complex of 2-connected graphs and the graph-complex of trees;On invariants and homology of spaces of knots in arbitrary manifolds