A tale of three equations; or the emperors have no clothes Neal Koblitz Department 07 January 2009 Pages: 4 - 10
Unclad emperors: A case of mistaken identity Herbert A. Simon Department 07 January 2009 Pages: 11 - 14
Regular polyhedra with hidden symmetries Jürgen BokowskiJörg M. Wills Article 07 January 2009 Pages: 27 - 32
José anastácio da cunha: A forgotten forerunner Joäo Filipe Queirö Article 07 January 2009 Pages: 38 - 43
From pythagoras’ theorem via sums of squares to celestial mechanics Olga Taussky Article 07 January 2009 Pages: 52 - 55
On the Gregorian revision of the Julian calendar Jacques Dutka Article 07 January 2009 Pages: 56 - 64