Lenny Taelman (University of Groningen)

Behind this title lies an entire branch of mathematics that has as its goal a combinatorial description of the absolute Galois group of the field of rational numbers 1 + ¹/4 + ¹/9 + ... = ¹/6 π².In this lecture I shall give an introduction to this beautiful part of mathematics, assuming only some familiarity with elementary Group Theory and Complex Analysis in one variable. |