William Thomas Tutte. 14 May 1917 — 2 May 2002

William T. Tutte (1917–2002), Volume 51, Number 3

ing from the behavior of linearly independent sets of columns of a matrix, in 1935, Whitney defined a matroid M to consist of a finite set E (or E(M)) and a collection I (or I(M)) of subsets of E called independent sets with the properties that the empty set is independent; every subset of an independent set is independent; and if one independent set has more elements than another, then an elem...

20 May 2001 − − 1917

May 29, 2002

I apologize both to Jane Fountain and to my fellow workshop participants for the lateness of this memo, which reflects both an overwrought end-of-semester schedule and a certain diffidence stemming from my lack of expertise in the topic of the workshop. My own empirical research on digital technologies has dealt with how typical Americans – that is, the cross-section of folks that a well design...

FEATURE STORY1 May 2002

Wil Stewart is a former HIV/AIDS clinical trials nurse, a member of the Harm Reduction Action Society and works in the Day Health Program at the Dr. Peter Centre, Vancouver. Acknowledgment: The authors thank the following for their expertise and support: Thomas Kerr, Fiona Gold, Judith Thompson, Irene Goldstone, Mary Adlersberg and the participants, staff and Board of the Dr. Peter AIDS Foundat...

Research Activities #261, May 2002

blockers (drugs to slow the heart rate and reduce contractions of the heart muscle) prior to bypass surgery appear to have improved survival and fewer complications during and after the procedure, according to a study supported by the Agency for Healthcare Research and Quality (HS10403). Researchers indicate that up to 1,000 lives potentially could be saved each year by giving patients beta blo...