Ernst Lindelöf | |
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| Born | 7 March 1870 |
| Died | 4 June 1946 (1946-06-05) (aged 76) Helsinki |
| Alma mater | University of Helsinki (PhD, 1893) |
| Known for | Lindelöf hypothesis Lindelöf's lemma Lindelöf's theorem Lindelöf space Phragmén–Lindelöf principle Picard–Lindelöf theorem |
| Scientific career | |
| Fields | Mathematics |
| Thesis | Sur les systèmes complets et le calcul des invariants différentiels des groupes continus finis (1893) |
| Doctoral advisor | Hjalmar Mellin |
| Doctoral students | Lars Ahlfors Rolf Nevanlinna Pekka Myrberg |
Ernst Leonard Lindelöf (Swedish pronunciation:[ˈlɪ̂nːdɛˌløːv]; 7 March 1870 – 4 June 1946) was aFinnish mathematician, who made contributions inreal analysis,complex analysis andtopology.Lindelöf spaces are named after him. He was the son of mathematicianLorenz Leonard Lindelöf and brother of thephilologistUno Lorenz Lindelöf [fi].[1]
He was secretary of theFinnish Society of Science and Letters (societas scientiarum Fennica) in its centenary year, 1938.[2]
Lindelöf studied at theUniversity of Helsinki, where he completed hisPhD in 1893, became adocent in 1895 andprofessor of Mathematics in 1903. He was a member of theFinnish Society of Sciences and Letters.
In addition to working in a number of different mathematical domains includingcomplex analysis,conformal mappings,topology,ordinary differential equations and thegamma function, Lindelöf promoted the study of the history of Finnish mathematics. He is known for thePicard–Lindelöf theorem on differential equations and thePhragmén–Lindelöf principle, one of several refinements of themaximum modulus principle that he proved incomplex function theory. He was the PhD supervisor forLars Ahlfors at theUniversity of Helsinki.
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