CONTENTS -- Preface -- Short Recollections about Sasha -- Sipping Tea with Sasha -- Part I. Analytic Topology of Groups, Actions, Strings and Varieties -- Analytic Topology of Groups, Actions, Strings and Varieties -- Part II. Research Articles -- Jørgensen's Inequality for Non-Archimedean Metric Spaces -- The Hypoelliptic Dirac Operator -- Generalized Operads and Their Inner Cohomomorphisms -- Chern Character for Twisted Complexes -- (C, F )-Actions in Ergodic Theory -- Homomorphic Images of Branch Groups, and Serre's Property (FA) -- On Nori's Fundamental Group Scheme -- The Reidemeister Number of Any Automorphism of a Baumslag-Solitar Group is Infinite -- Pentagon Relation for the Quantum Dilogarithm and Quantized M cyc 0,5 -- Geodesic Flow on the Normal Congruence of a Minimal Surface -- The Chern Character of a Parabolic Bundle, and a Parabolic Corollary of Reznikov's Theorem -- Kleinian Groups in Higher Dimensions -- A ∞ -bimodules and Serre A ∞ -functors -- Geometrization of Probability -- Milnor Invariants and l-Class Groups -- Three Topological Properties of Small Eigenfunctions on Hyperbolic Surfaces -- Quantum p-adic Spaces and Quantum p-adic Groups -- Convolution Equations on Lattices: Periodic Solutions with Values in a Prime Characteristic Field.