Hugo Dyonizy Steinhaus

Hugo Steinhaus
Hugo Steinhaus (1968)
Born	Władysław Hugo Dionizy Steinhaus (1887-01-14)January 14, 1887 Jasło, Austria-Hungary (now Poland)
Died	February 25, 1972(1972-02-25) (aged 85) Wrocław, Poland
Residence	Poland
Nationality	Polish
Fields	Mathematician and mathematics populariser
Institutions	Jan Kazimierz University University of Wrocław University of Notre Dame University of Sussex
Alma mater	Lemberg University Göttingen University
Doctoral advisor	David Hilbert
Doctoral students	Stefan Banach Z. W. (Bill) Birnbaum Mark Kac Władysław Orlicz Aleksander Rajchman Juliusz Schauder Stanisław Trybula
Known for	Banach–Steinhaus theorem, many others, see section below.

Władysław Hugo Dionizy Steinhaus /ˈhjuːɡoʊ ˈstaɪnˌhaʊs/ (January 14, 1887 – February 25, 1972) was a Polish mathematician and educator. Steinhaus obtained his PhD under David Hilbert at Göttingen University in 1911 and later became a professor at the Jan Kazimierz University in Lwów (now Lviv, Ukraine), where he helped establish what later became known as the Lwów School of Mathematics. He is credited with "discovering" mathematician Stefan Banach, with whom he gave a notable contribution to functional analysis through the Banach–Steinhaus theorem. After World War II Steinhaus played an important part in the establishment of the mathematics department at Wrocław University and in the revival of Polish mathematics from the destruction of the war.

Author of around 170 scientific articles and books, Steinhaus has left his legacy and contribution in many branches of mathematics, such as functional analysis, geometry, mathematical logic, and trigonometry. Notably he is regarded as one of the early founders of game theory and probability theory which led to later development of more comprehensive approaches by other scholars.