Tangential Symmetries of Planar Curves and Space Curves
The return sequence of the Bowen-Series map for punctured surfaces
For a non-compact hyperbolic surface M of finite area, we study a certain Poincaré section for the geodesic flow. The canonical, non-invertible factor of the first return map to this section is shown to be pointwise dual ergodic with return sequence (aₙ) given by aₙ = π/(4(Area(M) + 2π)) · n/(log n). We use this result to deduce that the section map itself is rationally ergodic, and that the geodesic flow associated to M is ergodic with respect to the Liouville measure. ...
The Steiner Ratio Conjecture for Cocircular Points.
The use of visual schema to find properties of a hexagon
Théorème sur les surfaces
To construct a regular polygon of 17 sides. (Mit 1 Figur im Text)
Trisection de l'angle au moyen du limaçon de Pascal
Tro- i četverokut u savezu sa aritmetičkimi i geometrijskimi progresijami
Two-distance preserving functions.
Typisierung der elliptischen Dreiecke nach der Qualität ihrer Winkel und Seiten.