This summary of that exciting epoch will be useful. A crucial omission is the Eilenberg-Zilber 1950 paper in the Annals (reviewed by H. Cartan). This introduction of the category now called simplicial sets was quite crucial in the development of category theory and its applications, for example the 1949 application by Eilenberg and Mac Lane in their discovery of the k-invariants. The first lines of the paper emphasize that the points functor is not faithful . I like to cite this category when confronted by recalcitrant logicians or "universal topologists" who insist that such categories are "abstract"; " real mathematicians" have been using them routinely for over fifty years. ************************************************************ F. William Lawvere Mathematics Department, State University of New York 244 Mathematics Building, Buffalo, N.Y. 14260-2900 USA Tel. 716-645-6284 HOMEPAGE: http://www.acsu.buffalo.edu/~wlawvere ************************************************************ 10-Jan-2002 10:02:13 -0400,2242;000000000000-00000000