K теореме о натуральных уравнениях кривой
Kähler manifolds of quasi-constant holomorphic sectional curvatures
The Kähler manifolds of quasi-constant holomorphic sectional curvatures are introduced as Kähler manifolds with complex distribution of codimension two, whose holomorphic sectional curvature only depends on the corresponding point and the geometric angle, associated with the section. A curvature identity characterizing such manifolds is found. The biconformal group of transformations whose elements transform Kähler metrics into Kähler ones is introduced and biconformal tensor invariants are obtained....
Kinematics of relative motion of test particles in general relativity
Krümmungstheorie und Variationsrechnung.
Krümmungstreue Diffeomorphismen Riemannscher und pseudo-Riemannscher Mannigfaltigkeiten.
K-пространства постоянного типа.