Please answer the following question: What type of details about imre simon can be gathered from the following bio? Bio: imre simon -lrb- august 14 , 1943 -- august 13 , 2009 -rrb- 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 sao 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 . he received his ph.d. at the university of waterloo in 1972 , under janusz brzozowski with the thesis : '' hierarchies of events with dot-depth one '' . he died of lung cancer in sao paulo , brazil on august 13 , 2009 , aged 65 .
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