Adrian Henri – Total Artist

Adrian Dumitrescu

This column is devoted to maximum (respectively, maximum weight) independent set problems in geometric intersection graphs. We illustrate with one example in each class: (I) The following question was asked by T. Rado in 1928: What is the largest number c such that, for any finite set F of axis-parallel squares in the plane, there exists an independent subset I ⊆ F of pairwise disjoint squares ...

Adrian Bird

comprised populations that differ genetically in their response to the environment at spatial scales of around 600–800 km, undetected by microsatellite DNA variations. They caught cod from four populations within the Atlantic and looked at larval growth in the laboratory. Among all four populations, growth increased with food supply and temperature but the influence of changes in food and tempe...

Charles-Jules-Henri Nicolle

sia. Nicolle's many accomplishments include the discovery that epidemic typhus is transmitted by body lice (Pediculus humanis corporis), discovery of the phenomenon of inap-parent infection, and possibly the first isolation of human influenza virus after experimental transmission. Nicolle made many other fundamental contributions to knowledge of infectious diseases. This year is the centenary o...

Henri De Mondeville *

Henri ’ s Crystal Ball

O n April 10, 1908, at the general session of the Fourth International Congress of Mathematicians held in Rome, Gaston Darboux presented a talk by Henri Poincaré (1854–1912) entitled The Future of Mathematics (Poincaré was unfortunately unable to deliver the talk himself). The original can be found on the web at: http://gallica. bnf.fr/ark:/12148/bpt6k17083c/f934n10. capture. It is now a full c...