1. Immersions with totally reducible focal set

   • Sheila Carter
   • Ridvan Ezentas

   OriginalPaper Pages: 1 - 7

2. Spherical simplexes too big to exist

   • Boris V. Dekster

   OriginalPaper Pages: 8 - 22

3. Perspectivities of odd order and chevalley groups

   • Ulrich Dempwolff

   OriginalPaper Pages: 23 - 47

4. Hypersurfaces of non-negative ricci curvature in a euclidean space

   • Sharief Deshmukh

   OriginalPaper Pages: 48 - 50

5. Die gruppe der stetigen autotopismen des loops S⁷

   • Rudolf Z. Domiaty

   OriginalPaper Pages: 51 - 62

6. Volume estimate for a cone with a submanifold as vertex

   • Fernando Giménez

   OriginalPaper Pages: 63 - 86

7. Translation planes of large dimension admitting nonsolvable groups

   • V. Jha
   • Norman L. Johnson

   OriginalPaper Pages: 87 - 104

8. Free modules over hjelmslev rings in which not every maximal linearly independent subset is a basis

   • Alexander Kreuzer

   OriginalPaper Pages: 105 - 113

9. Grünbaum 4-arrangements on the 120-cell and the 600-cell

   • Matthew Marken
   • John E. Wetzel

   OriginalPaper Pages: 114 - 120

10. Cassini-kurven in der lichtfeldtheorie

    • Horst Martini
    • Uwe Schiel

    OriginalPaper Pages: 121 - 130

11. Surfaces of positive curvature whose characteristic lines constitute two families of geodesic parallels

    • Abdülkadir Özdeger
    • Ömer Pek§en

    OriginalPaper Pages: 131 - 136

12. Faserungen, die Aus Reguli mit Einem Gemeinsamen Geradenpaar Zusammengesetzt Sind

    • Rolf Riesinger

    OriginalPaper Pages: 137 - 157

13. Configurations of weighted circles in finite inversive planes

    • F. A. Sherk

    OriginalPaper Pages: 158 - 173

14. A family of translation planes of order q³

    • Chihiro Suetake

    OriginalPaper Pages: 174 - 176

15. Simplicial arrangements associated with the 24-cell

    • John E. Wetzel

    OriginalPaper Pages: 177 - 200