In 1976, the American mathematician George Andrews found what is nowadays known as the "Lost Notebook" of Ramanujan. It contains many remarkable results, including the mysterious mock theta functions. This notebook contains what many specialists regard as Ramanujan’s deepest work. It was Sander Zwegers who, as a PhD student, had groundbreaking ideas how to fit the mock theta functions into a broader context. His 2002 PhD thesis has led to numerous publications and international conferences.3
Zwegers' general area of interest is number theory. More specifically, he studies modular forms and variations thereof, such as Maass forms, mock modular forms, (indefinite) theta functions, and (Maass) Jacobi forms.
27] S. P. ZWEGERS – Mock Theta Functions. Thesis, Utrecht, 2002. Republished in 2008. ↩
Don Zagier Ramanujan´s Mock Theta Functions and their Applications (d'après Zwegers and Bringmann-Ono), Séminaire Bourbaki, No. 986, 2007 http://people.mpim-bonn.mpg.de/zagier/files/aster/326 ↩
Peter Lynch, Timely reminder of a mathematical genius, The Irish Times, Dec 6, 2012. https://www.irishtimes.com/news/science/timely-reminder-of-a-mathematical-genius-1.1329 ↩