1. Cyclic surfaces in E ⁵ generated by equiform motions

   • Nassar H. Abdel-All
   • Fathi M. Hamdoon

   Original Paper Pages: 1 - 11

2. Direct sum decomposition of geometries based on maximal subgroups

   • Claude Archer

   Original Paper Pages: 12 - 18

3. Extensions of distance preserving mappings in euclidean and hyperbolic geometry

   • Walter Benz

   Original Paper Pages: 19 - 26

4. Mappings preserving area 1 of triangles

   • Walter Benz

   OriginalPaper Pages: 27 - 30

5. Projectively flat affine surfaces

   • Thomas Binder

   Original Paper Pages: 31 - 45

6. Set of involutions arising from an egglike inversive plane

   • Giovanna Bonoli
   • Sveva Freni

   Original Paper Pages: 46 - 55

7. Paradoxical decompositions of planar sets of positive outer measure

   • Maxim R. Burke

   Original Paper Pages: 56 - 58

8. Self-dual sets of type (m, n) in projective spaces

   • Osvaldo Ferri
   • Stefania Ferri
   • Mauro Zannetti

   Original Paper Pages: 59 - 66

9. Linear spaces with many projective planes

   • Reinhard Freitag
   • Alexander Kreuzer

   Original Paper Pages: 67 - 74

10. On conformally flat contact metric manifolds

    • Florence Gouli-Andreou
    • Niki Tsolakidou

    Original Paper Pages: 75 - 88

11. Residual intersection theory with reducible schemes

    • Georg Hein

    Original Paper Pages: 89 - 101

12. Geometrical contributions to secret sharing theory

    • Wen-Ai Jackson
    • Keith M. Martin
    • Christine M. O’Keefe

    Original Paper Pages: 102 - 133

13. On neighborly families of convex bodies

    • Alexandr V. Kuzminykh

    Original Paper Pages: 134 - 145

14. Constructions of rank five geometries for the Mathieu group M ²²

    • Dimitri Leemans

    Original Paper Pages: 146 - 155

15. Weingarten rotation surfaces in 3-dimensional de Sitter space

    • Huili Liu
    • Guili Liu

    Original Paper Pages: 156 - 168

16. Transformations of Grassmannians preserving the class of base subsets

    • Mark Pankov

    Original Paper Pages: 169 - 176

17. Geometry of the structure of linear complements

    • Krzysztof Prażmowski
    • Mariusz Żynel

    Original Paper Pages: 177 - 189

18. Sets expressible as finite unions of starshaped sets

    • Fausto A. Toranzos
    • Ana Forte Cunto

    Original Paper Pages: 190 - 195