Adolf Lindenbaum

Adolf Lindenbaum was a Polish-Jewish logician and mathematician, born on June 12, 1904, in Warsaw, Poland. He is best known for his contributions to logic and mathematics, including Lindenbaum's lemma and Lindenbaum–Tarski algebras. Lindenbaum earned his Ph.D. in 1928 under Wacław Sierpiński and habilitated at the University of Warsaw in 1934. His research spanned various fields such as mathematical logic, set theory, cardinal and ordinal arithmetic, the axiom of choice, the continuum hypothesis, theory of functions, measure theory, point-set topology, geometry, and real analysis. He served as an assistant professor at the University of Warsaw from 1935 until the outbreak of World War II in September 1939. Lindenbaum was a close collaborator of Alfred Tarski and was married to Janina Hosiasson-Lindenbaum, also a logician. They were adherents of logical empiricism and participants in the unity of science movement, and members of the Vienna Circle. Tragically, Adolf Lindenbaum and his sister Stefanja were executed by the occupying German forces or Lithuanian collaborators sometime before the middle of August 1941 in Naujoji Vilnia, Lithuania, at the age of 37.