To concept “middle" of affine planes.
To construct a regular polygon of 17 sides. (Mit 1 Figur im Text)
To the isotropic analogue of the theorem of Abramescu.
To the isotropic generalization of Wallace lines.
Topological and smooth unitals.
Topological pseudo-ovals, elation Laguerre planes, and elation generalized quadrangles.
Topological Representation of Dual Pairs of Oriented Matroids.
Topologische desarguessche Ebenen (Char. ... 2) im spiegelungsgeometrischen Aufbau
Topologische Möbiusebenen in spiegelungsgeometrischer Darstellung
Topology and dimension of stable planes: On a conjecture of H. Freudenthal.
Topology of the isometry group of the Urysohn space
Using classical results of infinite-dimensional geometry, we show that the isometry group of the Urysohn space, endowed with its usual Polish group topology, is homeomorphic to the separable Hilbert space ℓ²(ℕ). The proof is based on a lemma about extensions of metric spaces by finite metric spaces, which we also use to investigate (answering a question of I. Goldbring) the relationship, when A,B are finite subsets of the Urysohn space, between the group of isometries fixing A pointwise, the group...
Towards Sub-cellular Modeling with Delaunay Triangulation
In this article a novel model framework to simulate cells and their internal structure is described. The model is agent-based and suitable to simulate single cells with a detailed internal structure as well as multi-cellular compounds. Cells are simulated as a set of many interacting particles, with neighborhood relations defined via a Delaunay triangulation. The interacting sub-particles of a cell can assume specific roles – i.e., membrane sub-particle, internal sub-particle, organelles, etc –,...
Towards the determination of the regular -covers of
A set of lines of is said to cover a point of times if there are exactly lines of incident with . An -cover of is a set of lines of which covers each point of times. In this paper, the properties and known examples of -covers...
Traces, lengths, axes and commensurability
The focus of this paper are questions related to how various geometric and analytical properties of hyperbolic 3-manifolds determine the commensurability class of such manifolds. The paper is for the large part a survey of recent work.
Trägerflächen isophotischer Elemente aus einer Schar gleicher Stellung bei Zentralbeleuchtung 2. Art mit einem Drehellipsoid als Indikatrix
Transfinite methods in geometry.
Transformace souřadnic pravoúhelných
Transformaciones que conservan el área.
Transformation of Hyperbolic Escher Patterns
Transformationen von Polyedern in Polyederketten.