Erling Følner
| Erling Følner | |
|---|---|
| Born |
18 November 1919 Copenhagen |
| Died | 10 October 1991 (aged 71) Hillerød |
| Nationality | Danish |
| Occupation | Mathematician |
| Known for | Følner sequence |
Erling Følner (18 November 1919 – 10 October 1991) was a Danish mathematician known for the Følner sequence.
Professor at the Technical University of Denmark (Danmarks Tekniske Højskole, DtH) in the period from 1954 to 1974. Følner published a comprehensive survey of almost periodic functions with Harald Bohr, and continued with further studies on this topic in his doctoral dissertation.
Følner is known internationally for the Følner sequence: a Følner sequence for a group is a sequence of sets satisfying a particular condition. If a group has a Følner sequence with respect to its action on itself, the group is amenable. A more general notion of Følner nets can be defined analogously, and is suited for the study of uncountable groups.
Følner married Harald Bohr's daughter, Ellen Bohr (1923–1972).
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