Brazilian historian of mathematics (1932–2021)
Ubiratan D'Ambrosio (December 8, 1932 – May 12, 2021) was a Brazilian mathematics educator and historian of mathematics.
Life.
D'Ambrosio was born in São Paulo, and earned his doctorate from the University of São Paulo in 1963. He retired as a professor of mathematics from the State University of Campinas, São Paulo, Brazil in 1993.
He was a member of many societies, including Pugwash, and served the International Commission on the History of Mathematics (ICHM) for five years. 
D'Ambrosio was also the founder of the Brazilian Society for Mathematics and History of the International Group of Ethnomathematicians. 
In 2001, he and Lam Lay Yong were jointly awarded the Kenneth O. May Prize.
References.
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