Education
Leiden University.
Leiden University.
After completing his master"s degree in Leiden from 1918–1922 he studied in Copenhagen with Harald Bohr and in Oxford with G. H. Hardy. In 1924 he received his Doctor of Philosophy in Leiden under supervision of J. C. Kluyver. From 1926 to 1928 he studied in Göttingen and Hamburg, and he was assistant in Münster from 1928-1930.
Kloosterman was appointed lector (associate professorship) in Leiden in 1930 and full professor in 1947.
Royal Netherlands Academy of Arts and Sciences.