Combinatorial handles and manifolds with boundary Paola BandieriCarlo GagliardiGaetano Volzone OriginalPaper Pages: 10 - 19
The compact cyclides of Dupin and a conjecture of B.-Y. Chen Filip DefeverRyszard DeszczLeopold Verstraelen OriginalPaper Pages: 33 - 38
Ein Darstellungssatz für Translations-Hjelmslev-Ebenen mit Spiegelungen Gerald Fischbach OriginalPaper Pages: 45 - 54
A proof of Pasch's axiom in the absolute theory of oriented parallelity Małgorzata Grochowska-Prazmowska OriginalPaper Pages: 66 - 81
Points of difference: Relative infinity in the Euclidean plane J. A. Lester OriginalPaper Pages: 92 - 118
A four vertex theorem for strictly convex space curves Juan J. Nuño BallesterosM. Carmen Romero Fuster OriginalPaper Pages: 119 - 126
Generalized double involutive geometry of the triangle Adolfo QuirósPablo Rubio OriginalPaper Pages: 133 - 173
A note on projective coordinate systems of modular lattices Stefan E. Schmidt OriginalPaper Pages: 174 - 176
On 0-distance-preserving permutations of affine and projective quadrics Eberhard M. Schröder OriginalPaper Pages: 177 - 185
Über die Leitflächen konstanten Mittenabstandes von Geradenkongruenzen des einfach isotropen Raumes Georg Stamou OriginalPaper Pages: 186 - 200
