The 2009 Srinivasa Ramanujan Prize has been awarded to Ernesto Lupercio, CINVESTAV, Instituto Politécnico Nacional, Mexico.
The prize is in recognition of "his outstanding contributions to algebraic topology, geometry and mathematical physics. He is an expert in the theory of orbifolds (spaces with singularities arising from finite symmetric groups). He has fundamental results on K-theory, gerbes, and Chas-Sullivan type string topology operations.
The prize is also in acknowledgement of the enormous contribution that Professor Lupercio has made to mathematics in Mexico, through his energy, enthusiasm and collaborations with young researchers."