O čtvrtém Hilbertově problému
O množině středů křivek konstantní křivosti rozšířené hyperbolické roviny, které procházejí daným bodem hyperbolické roviny a dotýkají se dané křivky konstantní křivosti
On a problem for isometric mappings of posed by Th. M. Rassias.
On analytic models of synthetic differential geometry
On four-colourings of the rational four-space.
On Lorentz-Minkowski geometry in real inner product spaces.
On metric products
On moduli of expansion of the duality mapping of smooth Banach spaces.
On pairs of metrics invariant under a cocompact action of a group.
On some properties of the metric dimension
On the -angle and -angle in normed spaces.
On the integration theorem for Lie groupoids
On the interpoint distance sum inequality.
On the iso-taxicab trigonometry.
On the Lifshits Constant for Hyperspaces
The Lifshits theorem states that any k-uniformly Lipschitz map with a bounded orbit on a complete metric space X has a fixed point provided k < ϰ(X) where ϰ(X) is the so-called Lifshits constant of X. For many spaces we have ϰ(X) > 1. It is interesting whether we can use the Lifshits theorem in the theory of iterated function systems. Therefore we investigate the value of the Lifshits constant for several classes of hyperspaces.
On the ordered sets in -dimensional real inner product spaces.
On the plane geometry with generalized absolute value metric.
On the relation between ordered sets and Lorentz--Minkowski distances in real inner product spaces.
On the tangency of sets in generalized metric spaces for certain functions of the class
On -distance in three dimensional space.