Meeting held Aug. 30-Sept. 4, 1989.

Includes bibliographical references.

Quasiderivations in diagonal matrix algebras; (^2) Atiyah-Bott-Lefschetz theorem;Topological structure of saddle surfaces;On uniqueness of reconstruction of the form of convex and visible bodies from their projections;On subalgebras of maximal rank of semisimple Lie algebras;Algebraic principles of building mathematical structures;On the absence of Sullivan's cusp finiteness theorem in higher dimensions;The variety of all rings has Higman's property;Boolean-valued introduction to the theory of vector lattices;The Whitehead groups of algebraic groups and applications to some problems of algebraic group theory;Diffeomorphicity criteria for simply connected manifolds;On the theory of generalized fibre bundles and some of their twisted forms;On mappings preserving convexity;Affine crystallographic groups;Integrals with respect to vector-valued measures: Theoretical problems and applications;Generalized derivations of algebras