1. Geleitwort

   EditorialNotes Pages: 1 - 2

2. Regular and semi-regular polytopes. III

   • H. S. M. Coxeter

   OriginalPaper Pages: 3 - 45

3. Duality inG-algebras

   • Jacques Thévenaz

   OriginalPaper Pages: 47 - 85

4. Surfaces rationnelles non-spéciales dans ℙ⁴

   • James Alexander

   OriginalPaper Pages: 87 - 110

5. On the simon conjecture for minimal immersions withS ¹-symmetry

   • J. Bolton
   • L. M. Woodward

   OriginalPaper Pages: 111 - 121

6. Compactness results for orbifold instantons

   • Terry Lawson

   OriginalPaper Pages: 123 - 140

7. Surjectivity of certain injective semialgebraic transformations of ℝ ⁿ

   • Krzysztof Kurdyka
   • Kamil Rusek

   OriginalPaper Pages: 141 - 148