Provides an introduction to Ramanujan's work in number theory, which arose out of $q$-series and theta functions. This book provides an introduction to these tw... » 

Provides an introduction to Ramanujan's work in number theory, which arose out of $q$-series and theta functions. This book provides an introduction to these two important subjects and to some of the topics in number theory that are inextricably intertwined with them, including the theory of partitions and sums of squares and triangular numbers. «