Joseph Gustave Jacques Deruyts (18 March 1862,

Liège Liège ( , , ; wa, Lîdje ; nl, Luik ; german: Lüttich ) is a major city and municipality of Wallonia and the capital of the Belgian province of Liège. The city is situated in the valley of the Meuse, in the east of Belgium, not far from b ...

– 5 July 1945, Liège)Deruyts, Joseph Gustave Jacques, bestor.be
/ref> was a Belgian mathematician, known as a pioneer of group representation theory. He is the elder brother of the mathematician :fr:François Deruyts Deruyts received his doctorate in 1883 from the University of Liège and was appointed there as assistant to Louis Pérard in

experimental physics Experimental physics is the category of disciplines and sub-disciplines in the field of physics that are concerned with the observation of physical phenomena and experiments. Methods vary from discipline to discipline, from simple experiments and ...

. Deruyts joined the academic staff in mathematics and was appointed in 1883 a professor of geometry at the University of Liège, where he remained until retirement as professor emeritus. He was elected in 1892 as a member of the Royal Academy of Science, Letters and Fine Arts of Belgium, which has been awarding since 1952 the

Jacques Deruyts Prize The Jacques Deruyts Prize, or Prix Jacques Deruyts, is a monetary prize that recognizes distinguished research contributions in Mathematics. It was first awarded in 1952 by the Académie Royale de Belgique, Classe des Sciences and is named for Ja ...

. He published in 1892 a treatise ''Essai d'une théorie générale des formes algébriques'' which was pioneering research in the representation theory of linear groups and

algebraic groups In mathematics, an algebraic group is an algebraic variety endowed with a group structure which is compatible with its structure as an algebraic variety. Thus the study of algebraic groups belongs both to algebraic geometry and group theory. M ...

. He was an Invited Speaker of the ICM with talk "Sur la théorie algébrique des formes à séries de ''n'' variables" in 1920 at

Strasbourg Strasbourg (, , ; german: Straßburg ; gsw, label=Bas Rhin Alsatian, Strossburi , gsw, label=Haut Rhin Alsatian, Strossburig ) is the prefecture and largest city of the Grand Est region of eastern France and the official seat of the Eu ...

References

1862 births 1945 deaths 19th-century Belgian mathematicians 20th-century Belgian mathematicians Scientists from Liège Members_of_the_Royal_Academy_of_Belgium {{Europe-mathematician-stub