Ramanujans Lost Notebook : Part I

In the spring of 1976, George Andrews of Pennsylvania State University found "Ramanujans lost notebook." Its discovery has frequently been deemed the mathematical equivalent of finding Beethovens tenth symphony. The "lost notebook" contains considerable material on mock theta functions and so undoubtedly emanates from the last year of Ramanujans life. It should be emphasized that the material on mock theta functions is perhaps Ramanujans deepest work. Mathematicians are probably several decades away from a complete understanding of those functions.