Herbert Grötzsch

Herbert Grötzsch (1914–2003) was a German mathematician known for his contributions to graph theory and combinatorial geometry. He is often recognized for the Grötzsch Graph, which is a notable example in the study of properties of graphs, particularly in relation to coloring and planar graphs. The Grötzsch Graph is a triangle-free graph that requires four colors for a proper coloring, illustrating concepts in the field of graph coloring.