Also Notable
Also Notable
MATHEMATICS AND THE UNEXPECTED Ivar Ekeland University of Chicago Press; Chicago; 146 pages; $19.95 Ekeland writes, “This is the task I have set myself to accomplish: to sum up, in a few pictures;, the mathematics of time, which is the common background of much of contemporary science.” Like art, science has its compelling images, he argues—planets revolving around the sun in elliptical orbits, or more recently, Arnold’s cat, Smale’s horseshoe, and Thom’s c