Imre Simon (August 14, 1943 – August 13, 2009) was a Hungarian-born Brazilian mathematician and computer scientist. His research mainly focused on theoretical computer science, automata theory, and tropical mathematics, a subject he founded, and which was so named because he lived in Brazil. He was a professor of mathematics at the University of São Paulo in Brazil. He was also actively interested in questions of intellectual property and collaborative work, and was an enthusiastic advocate for open collaborative information systems, of which Wikipedia is an example.