Sander Pieter Zwegers (born April 16, 1975) is a Dutch mathematician who made a connection between Maass forms and Srinivasa Ramanujan's mock theta functions in 2002.
After a period at the Max-Planck Institute in Bonn, he became an assistant professor at the University College Dublin in 2008.
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.
It was Sander Zwegers who, as a PhD student, had groundbreaking ideas how to fit the mock theta functions into a broader context.