The book describes some interactions of topology with other areas of
mathematics and it requires only basic background. The first chapter
deals with the topology of pointwise convergence and proves results of
Bourgain, Fremlin, Talagrand and Rosenthal on compact sets of Baire
class-1 functions. In the second chapter some topological dynamics of
beta-N and its applications to combinatorial number theory are
presented. The third chapter gives a proof of the
Ivanovskii-Kuzminov-Vilenkin theorem that compact groups are dyadic. The
last chapter presents Marjanovic's classification of hyperspaces of
compact metric zerodimensional spaces.