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Heinrich Heesch (June 25, 1906, Kiel–July 26, 1995, Hannover) was a German mathematician. Events 524 - Battle of Vézeronce, the Franks defeat the Burgundians Year 1906 ( MCMVI) was a Common year starting on Monday (link will display full calendar of the Gregorian calendar (or a Common year starting For the city in the United States, see Kiel Wisconsin. For the name see Kiel (name. Events 657 - Battle of Siffin. 811 - Battle of Pliska; Byzantine Emperor Nicephorus Year 1995 ( MCMXCV) was a Common year starting on Sunday. Events of 1995 Hanover (i ( haˈnoːfɐ on the river Leine, is the capital of the federal state of Lower Saxony ( Niedersachsen Germany, officially the Federal Republic of Germany ( ˈbʊndəsʁepuˌbliːk ˈdɔʏtʃlant is a Country in Central Europe. A mathematician is a person whose primary area of study and research is the field of Mathematics.

In Göttingen he worked on Group theory. Göttingen ( ˈgœtɪŋən, Low German: Chöttingen is a College town in Lower Saxony, Germany. Group theory is a mathematical discipline the part of Abstract algebra that studies the Algebraic structures known as groups. In 1933 Heesch witnessed the National Socialist purges among the university staff. Year 1933 ( MCMXXXIII) was a Common year starting on Sunday (link will display full calendar of the Gregorian calendar. Nazism, which was a short name for National Socialism (Nationalsozialismus refers primarily to the Ideology and practices of the National Socialist German Not willing to become member of the National Socialist organization of university teachers as required, he resigned from his university position in 1935 and worked privately at his parent's home in Kiel until 1948. For the city in the United States, see Kiel Wisconsin. For the name see Kiel (name. During this time he did research on tilings. A tessellation or tiling of the plane is a collection of Plane figures that fills the plane with no overlaps and no gaps In 1955 Heesch began teaching at the Hannover Institute of Technology and worked on graph theory. Hanover (i ( haˈnoːfɐ on the river Leine, is the capital of the federal state of Lower Saxony ( Niedersachsen In Mathematics and Computer science, graph theory is the study of graphs: mathematical structures used to model pairwise relations between objects In this period Heesch did pioneer work in developing methods for a computer-aided proof of the then unproved Four color theorem. The four color theorem (also known as the four color map theorem) states that given any plane separated into regions such as a political map of the states of a country In particular, he was the first to investigate the notion of "discharging", which turned out to be a fundamental ingredient of the eventual computer-aided proof by Kenneth Appel and Wolfgang Haken. Kenneth Appel (born 1932 is a mathematician who in 1976 with colleague Wolfgang Haken at the University of Illinois at Urbana-Champaign, solved one of the most famous Between 1967 and 1971 Heesch came to the United States of America several times, where bigger and faster computers were available and where he worked with Haken and Y. The United States of America —commonly referred to as the Shimamoto. During the crucial phase of his project, the German national research fund DFG cancelled financial support. The Deutsche Forschungsgemeinschaft (abbreviated DFG, German Research Foundation in English) is an important German research funding organization After the 1977 success of Appel and Haken, Heesch worked on refining and shortening their proof, even after his retirement.

Works

Literature on Heinrich Heesch's work

External links

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