Kennzeichnung der geodätischen Abstandssphären in Hn+ 1 durch ihr Schattengrenzen-Verhalten bei paralleler und punktförmiger Beleuchtung.
Kikkawa loops and homogeneous loops
In H. Kiechle's publication ``Theory of K-loops'' [3], the name Kikkawa loops is given to symmetric loops introduced by the author in 1973. This concept started from an analogical imagination of sum of vectors in Euclidean space brought up on a sphere. In 1975, this concept was extended by him to the more general concept of homogeneous loops, and it led us to a non-associative generalization of the theory of Lie groups. In this article, the backstage of finding these concepts will be disclosed from...
Killing vector fields of constant length on Riemannian manifolds.
Knots in derived from Sym(2, ℝ)
We realize closed geodesics on the real conformal compactification of the space V = Sym(2, ℝ) of all 2 × 2 real symmetric matrices as knots or 2-component links in and show that these knots or links have certain types of symmetry of period 2.
Kompakte Unterräume symmetrischer Räume.