Jean-Louis Koszul

{{Infobox scientist

| name = Jean-Louis Koszul

| image = Jean-Louis Koszul.jpg

| image_size =

| caption =

| birth_date = {{birth date|1921|01|03|df=y}}

| birth_place = Strasbourg, France

| death_date = {{death date and age|2018|01|12|1921|01|03|df=y}}

| death_place =

| nationality = French

| fields = Mathematics

| workplaces = University of Grenoble (Joseph Fourier University)
University of Strasbourg

French Academy of Sciences

| alma_mater = University of Strasbourg

École Normale Superieure

| doctoral_advisor = Henri Cartan

| doctoral_students =

| thesis_title = Homologie et cohomologie des algèbres de Lie

| thesis_url = http://www.numdam.org/article/BSMF_1950__78__65_0.pdf

| thesis_year = 1950

| known_for = Koszul complex
Koszul duality
Koszul connection

| awards =

}}

Jean-Louis Koszul ({{IPA|fr|kɔsyl|lang}}; 3 January 1921 – 12 January 2018) was a French mathematician, best known for studying geometry and discovering the Koszul complex. He was a second generation member of Bourbaki.

Biography

Koszul was educated at the {{ill|Lycée Fustel-de-Coulanges (Strasbourg)|lt=Lycée Fustel-de-Coulanges|fr}} in Strasbourg before studying at the Faculty of Science University of Strasbourg and the Faculty of Science of the University of Paris. His Ph.D. thesis, titled Homologie et cohomologie des algèbres de Lie, was written in 1950 under the direction of Henri Cartan.

He lectured at many universities and was appointed in 1963 professor in the Faculty of Science at the University of Grenoble. He was a member of the French Academy of Sciences.

Koszul was the cousin of the French composer Henri Dutilleux, and the grandchild of the composer Julien Koszul.

Koszul married Denise Reyss-Brion on 17 July 1948. They had three children: Michel, Bertrand, and Anne.

He died on 12 January 2018, at the age of 97, nine days after his 97th birthday.[https://smf.emath.fr/node/27037 Décès de Jean-Louis Koszul]