1. Penrose tilings as coverings of congruent decagons

   • Petra Gummelt

   OriginalPaper Pages: 1 - 17

2. Ovoids with a pencil of translation ovals

   • Christine M. O'Keefe
   • Tim Penttila

   OriginalPaper Pages: 19 - 34

3. On tactical decompositions of class number 2

   • Yutaka Hiramine
   • Chihiro Suetake

   OriginalPaper Pages: 35 - 52

4. On the vertex group of n-manifolds

   • Sóstenes Lins
   • Michele Mulazzani

   OriginalPaper Pages: 53 - 64

5. On Ricci eigenvalues of locally homogeneous Riemannian 3-manifolds

   • O. Kowalski
   • S. Ž. Nikčević

   OriginalPaper Pages: 65 - 72

6. Venn diagrams and planar graphs

   • Kiran B. Chilakamarri
   • Peter Hamburger
   • Raymond E. Pippert

   OriginalPaper Pages: 73 - 91

7. On the isoperimetric deficit of a simplex and of a polygon

   • Qi-Ji Mao

   OriginalPaper Pages: 93 - 98

8. Conjugate points and closed geodesic arcs on convex surfaces

   • Tudor Zamfirescu

   OriginalPaper Pages: 99 - 105

9. Nice decompositions of R ⁿ entirely into nice sets are mostly impossible

   • John Cobb

   OriginalPaper Pages: 107 - 114