Bronisław Knaster

Bronisław Knaster ( May 22nd, 1893 in Warsaw, † November 3, 1980 in Wrocław) was a Polish mathematician.

Knaster his doctorate in 1923 with Stefan Mazurkiewicz in Warsaw and completed his habilitation two years later. After some years in Italy, he returned to Warsaw. From 1939 he taught at the University of Lwów. He moved in 1945 to Wrocław. In 1963 he was awarded the State Prize 1st class.

Knasters main area of ​​work was the topology to which he gave fundamental contributions. Particularly well known he was by the construction of various examples with unusual properties. These include named after him Knaster continuum as well as the pseudo -arc, the first example of a hereditary, indecomposable continuum. According to him, the Tarski fixed-point theorem of Tarski and Knaster is named.