1. A Reference to Perfect Numbers in Plato’s Theaetetus

   • F. Acerbi

   OriginalPaper 15 February 2005 Pages: 319 - 348

2. A Delicate Collaboration: Adrian Albert and Helmut Hasse and the Principal Theorem in Division Algebras in the Early 1930’s

   • Della D. Fenster
   • Joachim Schwermer

   OriginalPaper 15 February 2005 Pages: 349 - 379

3. Frobenius, Cartan, and the Problem of Pfaff

   • Thomas Hawkins

   OriginalPaper 05 March 2005 Pages: 381 - 436