1. Primitive Illumination Systems for Families of Convex Bodies in the Plane

   • VALERIU SOLTAN
   • LÁSZLÓ SZABÓ
   • ÉVA VÁSÁRHELYI

   OriginalPaper Pages: 125 - 148

2. Determining Knotsw and Links by Cyclic Branched Coverings

   • BRUNO ZIMMERMANN

   OriginalPaper Pages: 149 - 157

3. A Liouville-Type Theorem for Strongly Subharmonic Functions on Complete Non-compact Riemannian Manifolds and Some Applications

   • PUI-FAI LEUNG

   OriginalPaper Pages: 159 - 162

4. Flocks, Ovoids of Q(4,q)and Designs

   • GUGLIELMO LUNARDON

   OriginalPaper Pages: 163 - 173

5. Geodesics in Heisenberg Groups

   • VALERY MARENICH

   OriginalPaper Pages: 175 - 185

6. Einstein Metrics with Nonpositive Sectional Curvature on Extensions of Lie Algebras of Heisenberg Type

   • MARTIN LANZENDORF

   OriginalPaper Pages: 187 - 202

7. Cubic Form Methods and Relative Tchebychev Hypersurfaces

   • A.-M. LI
   • H. L. LIU
   • C. P. WANG

   OriginalPaper Pages: 203 - 221

8. Cubical 4-Polytopes with Few Vertices

   • G. BLIND
   • R. BLIND

   OriginalPaper Pages: 223 - 231

9. Conformal Invariants of Manifolds of Non-posotive Scalar Curvature

   • MAN CHUN LEUNG

   OriginalPaper Pages: 233 - 243