Djairo Guedes de Figueiredo (academic signature: D. G. De Figueiredo, born on 2 April 1934, in Limoeiro do Norte) is a Brazilian mathematician noted for his researches on differential equations, elliptic operators, and calculus of variations. He is considered the greatest analyst from Brazil. He was the president of the Brazilian Mathematical Society from 1977 to 1979.
Figueiredo is a well-known figure among Brazilian students in physics, engineering and mathematics, and has received many Brazilian national prizes, mostly for his popular mathematics textbooks (about analysis and differential equations) and expository writing papers, but also for his research in pure mathematics.
He was a Ph.D. student of Louis Nirenberg at New York University, and is currently a titular professor at UNICAMP, a position he earned in 1989.
He is a recipient of Brazil's National Order of Scientific Merit in mathematics (1995). Since 1969 he has been a member of the Brazilian Academy of Sciences.
The book Selected Papers of Djairo Guedes Figueiredo has been published by Springer, as part of the collection “Selected Works of Outstanding Brazilian Mathematicians”. (Google Preview)