Karl Reinhardt (mathematician)

Karl August Reinhardt
Karl August Reinhardt
Born	January 27, 1895; Frankfurt am Main
Died	April 27, 1941 (aged 46); Berlin
Education	Goethe Univ. Frankfurt
Known for	Hilbert's eighteenth problem; Pentagonal tiling; Reinhardt polygons; Reinhardt's conjecture; Reinhardt domains;
	Scientific career
Fields	Geometry
Institutions	Goethe University Frankfurt; University of Greifswald;
Thesis	Über die Zerlegung der Ebene in Polygone (1918)
Doctoral advisor	Ludwig Bieberbach

Karl August Reinhardt (27 January 1895 – 27 April 1941) was a German mathematician whose research concerned geometry, including polygons and tessellations. He solved one of the parts of Hilbert's eighteenth problem, and is the namesake of the Reinhardt domains in several complex variables, and Reinhardt polygons and the Reinhardt conjecture on packing density.