Mathematical intelligencer news: Online edition, electronic submission Chandler DavisMajorie Senechal EditorialNotes 25 April 2009 Pages: 3 - 3
Non-Euclidean pythagorean triples, a problem of euler, and rational points on K3 surfaces Robin HartshorneRonald Van Luijk Article 25 April 2009 Pages: 4 - 10
Erratum to: Max von laue’s role in the relativity revolution David E. Rowe Erratum 25 April 2009 Pages: 10 - 10
An introduction to infinite hat problems Christopher S. HardinAlan D. Taylor Article 25 April 2009 Pages: 20 - 25
Stefan Banach remembered in Krakow Danuta CiesielskaKrzysztof Ciesielski Department 25 April 2009 Pages: 31 - 35
The double life of Felix Hausdorff/ Paul Mongré Walter Purkert Department 25 April 2009 Pages: 36 - 50
Arthur Cayley mathematician laureate of the victorian age Henry E. Heatherly Review 25 April 2009 Pages: 64 - 67
Helmut Hasse und Emmy Noether. Die korrespondenz 1925–1935 Winfried Scharlau Review 25 April 2009 Pages: 67 - 68
Mathematics and the divine. A historical study Jean-Michel Kantor Review 25 April 2009 Pages: 70 - 71
Nonplussed! mathematical proof of implausible ideas Christina Birkenhake Review 25 April 2009 Pages: 71 - 72
