Alfréd Haar

Alfréd hair [ ɒlfre ː d ha ː r] ( born October 11, 1885 in Budapest, † March 16, 1933 in Szeged ) was a Hungarian mathematician.

Hair studied from 1904 in Göttingen and received his PhD in 1909 at Hilbert. After several years as an assistant in Göttingen, he was (today Cluj- Napoca in Romania ) was appointed in 1912 to the University of Kolozsvár ( Cluj ). After an interlude in Budapest, he went to the First World War to Szeged, where the University of Kolozsvár was moved to the cession of Transylvania to Romania through Hungary as a result of the Treaty of Trianon. In Szeged he worked closely with Frigyes Riesz.

Hair worked on partial differential equations, Chebyshev approximations and in particular on topological groups. The now named after him Haar measure is the transfer of the Lebesgue measure on locally compact groups. According to him, is also the Haar wavelet and named in the approximation theory of the hair room.

Honors

The asteroid ( 24907 ) Alfred Hair was named after him.