This column is a forum for discussion of mathematical communities thro
ughout the world and through all time. Our definition of ''mathematica
l community'' is the broadest. We include ''schools'' of mathematics,
circles of correspondence, mathematical societies, student organizatio
ns, and informal communities of cardinality greater than one. What we
say about the communities is just as unrestricted. We welcome contribu
tions from mathematicians of all kinds and in all places, and also fro
m scientists, historians, anthropologists, and others.