1. Dupin Hypersurfaces with Four Principal Curvatures

   • Thomas E. Cecil
   • Gary R. Jensen

   OriginalPaper Pages: 1 - 49

2. Statement from the Editors

   • Benson Farb
   • Robert Zimmer

   Legacy Pages: 5 - 6

3. Ferdinand Douwe Veldkamp: 5 September 1931–3 August 1999

   • Karl Strambach

   Legacy Pages: 7 - 7

4. Wulff-shape and Density Deviation

   • Uwe Schnell

   OriginalPaper Pages: 51 - 63

5. Conjugate Points on 2-Step Nilpotent Groups

   • Changrim Jang
   • Keun Park

   OriginalPaper Pages: 65 - 80

6. Projective Generalizations of Lelieuvre's Formula

   • B. G. Konopelchenko
   • U. Pinkall

   OriginalPaper Pages: 81 - 99

7. A Transfer Principle in the Real Plane from Nonsingular Algebraic Curves to Polynomial Vector Fields

   • Rudolf Winkel

   OriginalPaper Pages: 101 - 108