List of Famous people who died in 1973

Hellmuth Kneser was a Baltic German mathematician, who made notable contributions to group theory and topology. His most famous result may be his theorem on the existence of a prime decomposition for 3-manifolds. His proof originated the concept of normal surface, a fundamental cornerstone of the theory of 3-manifolds.

Friedrich Ahlers-Hestermann was a German painter and art writer from Hamburg. He was a member of the Hamburgische Künstlerclub of 1897, as well as of the Hamburg artist's workshop of 1832 and pupil of the Académie Matisse in Paris. In 1913, he met the Russian painter Alexandra Povorina, whom he married in 1916. After the First World War, he was a co-founder of the Hamburg Secession.

Geertruida Luberta de Haas-Lorentz was a Dutch physicist and the first to perform fluctuational analysis of electrons as Brownian particles. Consequently she is considered to be the first woman to work in electrical noise theory.