On a construction connecting Lie algebras with general algebras
On a convergence property of set algebras
On a degenerate parabolic boundary value problem
On a distinguished class of infinite dimensional representations of
On a factorization lemma and a construction of absolute without separation axioms
On a fixed point index method for the analysis of the asymptotic behavior and boundary value problems of process and semidynamical systems
On a general conception of duality in optimal control
On a mechanism of choosing morphisms in concrete categories
On a method which leads to extremally disconnected covers
On a nonlinear boundary value problem of higher order
On a nonlinear perturbation of a selfadjoint boundary value problem
On a problem of Katětov
On a problem of Tamas Varga
On a theorem of Brunovsky for periodic optimal control
On a theorem of Michael-Morita-Hanai
On admissible groups of diffeomorphisms
The phenomenon of determining a geometric structure on a manifold by the group of its automorphisms is a modern analogue of the basic ideas of the Erlangen Program of F. Klein. The author calls such diffeomorphism groups admissible and he describes them by imposing some axioms. The main result is the followingTheorem. Let , , be a geometric structure such that its group of automorphisms satisfies either axioms 1, 2, 3 and 4, or axioms 1, 2, 3’, 4, 5, 6 and 7, and is compact, or axioms 1, 2,...
On almost geodesic mappings of the type of Riemannian spaces preserving a system -orthogonal hypersurfaces
On almost geodesic mappings onto Riemannian spaces
On an example of Mary Ellen (Estill) Rudin
On an extension of Pontryagin's duality theory