1. Möbius- und Laguerre-Geometrien über schwach konvexen Semiflächen

   • Helmut Mäurer

   OriginalPaper Pages: 355 - 386

2. Heisenberg's commutation relations and Pontryagin's duality theorem

   • S. Sankaran

   OriginalPaper Pages: 387 - 390

3. Anti-isomorphisms of the endomorphism rings of torsion-free modules

   • Leonard Gewirtzman

   OriginalPaper Pages: 391 - 400

4. Symmetrie elliptischer Differentialoperatoren

   • Johann Walter

   OriginalPaper Pages: 401 - 406

5. Some results on multiplicity of solutions in frame mappings

   • Masami Wakae

   OriginalPaper Pages: 407 - 421