Alfréd Haar was a Hungarian mathematician. In 1904 he began to study at the University of Göttingen. His doctorate was supervised by David Hilbert. The Haar measure, Haar wavelet, and Haar transform are named in his honor. Between 1912 and 1919 he taught at Franz Joseph University in Kolozsvár. Together with Frigyes Riesz, he made the University of Szeged a centre of mathematics. He also founded the Acta Scientiarum Mathematicarum journal together with Riesz.
Alfréd Haar
Conference at the University of Szeged, 1928. Left to right, standing: Frigyes Riesz, Béla Kerékjártó, Alfréd Haar, Gyula Kőnig, Rudolf Ortvay [hu], on chairs: József Kürschák, George David Birkhoff, O.D. Kellog, Leopold Fejér, sitting on the floor: Tibor Radó, István Lipka [hu], László Kalmár, Pál Szász [hu]
David Hilbert was a German mathematician and one of the most influential mathematicians of the 19th and early 20th centuries. Hilbert discovered and developed a broad range of fundamental ideas including invariant theory, the calculus of variations, commutative algebra, algebraic number theory, the foundations of geometry, spectral theory of operators and its application to integral equations, mathematical physics, and the foundations of mathematics.
Hilbert in 1912
Hilbert in 1886
Hilbert in 1907
The Mathematical Institute in Göttingen. Its new building, constructed with funds from the Rockefeller Foundation, was opened by Hilbert and Courant in 1930.