A white paper is now available!

Treurfeest White Paper

Photos from the conference are available on the following web sites:

• Hendrik's baby pictures (shown at the banquet)
• Everett Howe's Treurfeest photos
• William Stein's website:
  • March 21
  • March 22
  • March 22 (Dinner)
  • March 23
• Alice Silverberg's Treurfeest pictures

Steven Hillion presented a poem to Hendrik which he phrased as a challenge problem to all participants. A copy of "The Cattle Problem of Archimedes", translated by Professor Lenstra and Dr. Hillion, will be awarded to the first person to solve the problem implied by the poem.

The slides from William Stein's talk on Non-square Orders of the Shafarevich-Tate Group are available on his website.

For those enticed by the Escher talk given by Bart de Smit, check out the Escher-Droste effect website.

To prepare for the conference, you might check out the following links:

• Hendrik Lenstra: A Bio
• The Wisdom of Hendrik W. Lenstra, Jr.
• Mathematician Fills in a Blank for a Fresh Insight on Art, an article in the New York Times concerning Lenstra's ongoing Escher project

Attention former Lenstra students! Find your name on the Lenstra genealogy chart courtesy of Everett Howe!