Ferdinand von Lindemann (1852–1939)
Born 1852 CE, died 1939 CE.
Carl Louis Ferdinand von Lindemann (12 April 1852 – 6 March 1939) was a German mathematician who proved in 1882 that π (pi) is a transcendental number, meaning it is not a root of any nonzero polynomial with rational coefficients.
Text from the Wikipedia article Ferdinand_von_Lindemann, licensed CC BY-SA 4.0.