 In the area of history and philosophy of mathematics there are no book length accounts of mathematical styles that explain the emergence of a certain style with sociological or psychological categories (although Netz 1999 has been of interest to theoreticians of style as an attempt at a cognitive history of an important segment of Greek mathematics). This is in contrast to books in history of the natural sciences such as Harwood 1993, whose goal is to explain the emergence of the thought style of the German genetics community through sociological arguments. The closest one comes to such an account is Bieberbach’s conception of style in mathematics as dependent on psychological and racial factors. He will be discussed in the next section on national styles.