Circles through two points that always enclose many points H. EdelsbrunnerN. HasanX. J. Shen OriginalPaper Pages: 1 - 12
A Gauss map and hybrid degree formula for compact hypersurfaces in Minkowski space Marek Kossowski OriginalPaper Pages: 13 - 23
Automorphisms of split Cayley algebras over real closed fields Erich W. EllersHuberta Lausch OriginalPaper Pages: 25 - 29
The coverse of the Jordan Curve Theorem and a characterization of planar maps Carsten Thomassen OriginalPaper Pages: 53 - 57
Some local-global principles for ordered projective planes Franz Kalhoff OriginalPaper Pages: 59 - 79