1. Circles through two points that always enclose many points

   • H. Edelsbrunner
   • N. Hasan
   • X. J. Shen

   OriginalPaper Pages: 1 - 12

2. A Gauss map and hybrid degree formula for compact hypersurfaces in Minkowski space

   • Marek Kossowski

   OriginalPaper Pages: 13 - 23

3. Automorphisms of split Cayley algebras over real closed fields

   • Erich W. Ellers
   • Huberta Lausch

   OriginalPaper Pages: 25 - 29

4. On abelian cubic arcs

   • D. Ghinelli
   • N. Melone
   • U. Ott

   OriginalPaper Pages: 31 - 52

5. The coverse of the Jordan Curve Theorem and a characterization of planar maps

   • Carsten Thomassen

   OriginalPaper Pages: 53 - 57

6. Some local-global principles for ordered projective planes

   • Franz Kalhoff

   OriginalPaper Pages: 59 - 79

7. Equivalence theorems in affine differential geometry

   • Franki Dillen

   OriginalPaper Pages: 81 - 92

8. An essay on skew translation generalized quadrangles

   • Stanley E. Payne

   OriginalPaper Pages: 93 - 118

9. Translation triple systems

   • Lynn Margaret Batten

   OriginalPaper Pages: 119 - 123