On a theorem of Pedrini concerning the non-existence of certain finite Minkowski —m — structures Pasquale Quattrocchi OriginalPaper Pages: 108 - 112
A proof of a relation between the numbers of singularities of a closed polygon Fr. Fabricius-Bjerre OriginalPaper Pages: 126 - 132
On the curvatures of midcurve and gable curve Flemming Damhus Pedersen OriginalPaper Pages: 133 - 143
Fundamentalsätze der quasielliptischen Differentialgeometrie Hellmuth Stachel OriginalPaper Pages: 144 - 153
Partial t-spreads and group constructible (s,r,μ)-nets David A. DrakeJ. W. Freeman OriginalPaper Pages: 210 - 216