Contents

Preface

G-Manifolds with One-Dimensional Orbit Space

A V. ALEKSEEVSKII and D V. ALEKSEEVSKIl

Arithmetic Crystallographic Groups Generated by Reflections,

and Reflective Hyperbolic Lattices

V.O. BUGAENKO

Invariant Algebras

A.G. ELASHVILI

On the Existence of Galois Sections

L. YU. GALITSKII

On Some Cohomology Invariants of Compact Homogeneous

Manifolds

VV. GORBATSEVICH

Explicit Form of Certain Multivector Invariants

AA. KATANOVA

On the Birational Geometry of the Space of Termary Quartics

P I. KATSYLO

Rationality of the Module Variety of Mathematical Instantons

with

P.I. KATSYLO

Holomorphic Vector Fields on Super-Grassmannians

A L. ONISHCHIK and AA SEROV

Affine Quasihomogeneous Normal SL2-Varieties: Hilbert Function

and Blow-ups

D. I PANYUSHEV

Complexity of Quasiaffine Homogeneous Varieties, t-Decompositions,

and Affine Homogeneous Spaces of Complexity 1

D. I PANYUSHEV

On the“ Lemma of Seshadri”

V L. POPOV

Coregular Algebraic Linear Groups Locally Isomorphic to SL2

D.A. SHMEL/KIN

An Example of a Nonarithmetic Discrete Group in the Complex Ball

O. V SHVARTSMAN

Free Subsemigroups of the Affine Group, and the Schoenflies

Bieberbach Theorem

G. A SOIFER