A 2-metric Characterization of the Euclidean Plane.
A Characterization of Motions as Bijections Preserving Inradius or Circumradius One.
A consistency equation for three geometries.
A new geometric inequality.
A normed space with the Beckman-Quarles property.
A projective characterization of cyclicity.
A supplement to Eddy's paper.
A Sylvester Theorem for Conic Sections.
Affine and projective generalization of Wallace lines.
An axiom system for full -dimensional Euclidean geometry
We present an axiom system for class of full Euclidean spaces (i.e. of projective closures of Euclidean spaces) and prove the representation theorem for our system, using connections between Euclidean spaces and elliptic planes.
An upper bound for a sequence of cevian inequalities.
Angle-preserving transformations of spheres.
Application de la généralisation du principe de correspondance à la théorie de l'élimination
Approximation eines Evolventenstücks durch ein Kreisbogenstück