Rousseau earned her Ph.D. from the Université de Montréal in 1977, under the supervision of Dana Schlomiuk, with a thesis entitled "Topos Theory and Complex Analysis".[1][2] After postdoctoral research at McGill University, she joined the Montréal faculty in 1979, and was promoted to full professor in 1991.[1] She was interim Director of Centre de Recherches Mathématiques from 2008 to 2009.
She was the first female vice-president of the International Mathematical Union, from 2011 to 2014. She implemented and led the Mathematics on Planet Earth initiative in 2013 (MPE 2013), supported by UNESCO, and played a leading role in having March 14 declared the International Day of Mathematics by UNESCO.[3]
She actively participates in mathematics popularization programs in high schools and cégeps, namely through presentations as well as the publication of over 35 vulgarization articles in the Accromath journal.[5]
Recognition
She has received the Adrien-Pouliot Prize and the Abel-Gauthier Prize of the Mathematical Association of Québec,[1] and the 2009 Graham Wright Award for Distinguished Service from the Canadian Mathematical Society.[6] She also received the 2014 George Pólya Award of the Mathematical Association of America for her article about a discovery by Inge Lehmann, "How Inge Lehmann Discovered the Inner Core of the Earth".[7] In 2012, she became a fellow of the American Mathematical Society (AMS).[8] In 2017 she became the inaugural recipient of the AMS' Bertrand Russell prize for furthering human values and the common good through mathematics.[9]
In 2018 the Canadian Mathematical Society listed her in their inaugural class of fellows.[10]