Ernst Leonard Lindelöf

Ernst Lindelof
Born	7 March 1870 Helsinki
Died	4 June 1946 Helsinki
Nationality	Finnish
Fields	Mathematics
Alma mater	University of Helsinki (Ph.D., 1893)
Thesis	Sur les systèmes complets et le calcul des invariants différentiels des groupes continus finis (1893)
Doctoral advisor	Hjalmar Mellin
Known for	Lindelöf hypothesis Lindelöf's lemma Lindelöf's theorem Lindelöf space Phragmén–Lindelöf principle Picard–Lindelöf theorem

Ernst Leonard Lindelöf (7 March 1870 – 4 June 1946) was a Finnish topologist after whom Lindelöf spaces are named. He was the son of Lorenz Leonard Lindelöf and brother of the philologist Uno Lorenz Lindelöf.

Biography

Lindelöf studied at the University of Helsinki, where he completed his Ph.D. in 1893, became a docent in 1895 and professor of Mathematics in 1903. He was a member of the Finnish Society of Sciences and Letters.

In addition to working on mathematical topics as diverse as differential equations (the Picard–Lindelöf theorem is named after him) and the gamma function, Lindelöf promoted the study of the history of Finnish mathematics.

Selected bibliography

• Le calcul des résidus et ses applications à la théorie des fonctions (Paris, 1905)
• Mémoire sur la théorie des fonctions entières d'ordre fini ("Acta societatis scientiarum fennicae" 31, 1903)
• With Lars Edvard Phragmén: "Sur une extension d'un principe classique de l'analyse et sur quelques propriétés des fonctions monogènes dans le voisinage d'un point singulier", in: Acta mathematica 31, 1908.

External links

• O'Connor, John J.; Robertson, Edmund F., "Ernst Leonard Lindelöf", MacTutor History of Mathematics archive, University of St Andrews.
• Ernst Leonard Lindelöf at the Mathematics Genealogy Project
• Works by Ernst Leonard Lindelöf at Project Gutenberg
• Works by or about Ernst Leonard Lindelöf at Internet Archive