Person: Borel (2), Armand

Armand Borel was a Swiss mathematician who worked in algebraic topology and in the theory of linear algebraic groups.

As well as Stiefel, Borel had attended lectures at the École Polytechnique Fédérale by Hopf who played an important role in influencing Borel's mathematical tastes.
Following his graduation, Borel was appointed as a teaching assistant at the École Polytechnique Fédérale in Zürich.
Jean Leray became Borel's thesis supervisor and he attended courses which he gave at the Collège de France.
After his year in Paris, Borel went to Geneva where he substituted for the professor of algebra from 1950 to 1952.
Borel had been invited to spend a year at the Institute for Advanced Study at Princeton and this was extended to a second year.
This was an opportunity for Borel to learn a great deal about algebraic geometry and number theory from Weil.
We should note at this point the major contribution that Borel made to Bourbaki.
Borel's work, apart from a dozen books, lecture notes ...encompasses more than 150 articles.
Among his books are Topics in the homology theory of fibre bundles (1967), which is based on lectures Borel gave at the University of Chicago in 1954 in which he described the state of the topic at that time adopting the same methods and points of view as in his thesis.
Also in 1969 Linear algebraic groups was published based on a graduate course given by Borel at Columbia University in the spring of 1968.
Borel loved to travel and made visits to many countries including India, Mexico and China.

Born 21 May 1923, La Chaux-de-Fonds, Switzerland. Died 11 August 2003, Princeton, New Jersey, USA.

View full biography at MacTutor

Bourbaki, Origin Switzerland

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O’Connor, John J; Robertson, Edmund F: MacTutor History of Mathematics Archive