Heinrich Heesch (June 25, 1906 – July 26, 1995) was a German mathematician. He was born in Kiel and died in Hanover.
Heinrich Heesch (1930)
In Göttingen he worked on Group theory. In 1933 Heesch witnessed the National Socialist purges of university staff. Not willing to become a member of the National Socialist organization of university teachers as required, he resigned from his university position in 1935 and worked privately at his parents' home in Kiel until 1948.
During this time he did research on tilings. In 1955 Heesch began teaching at Leibniz University Hannover and worked on graph theory. In this period Heesch did pioneering work in developing methods for a computer-aided proof of the then unproved four color theorem. 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.
Between 1967 and 1971, Heesch made several visits to the United States, where bigger and faster computers were available, working with Haken at University of Illinois at Urbana-Champaign and with Karl Durre and Yoshio Shimamoto at Brookhaven National Laboratory. During the crucial phase of his project, the German national research fund DFG cancelled financial support. After the 1977 success of Appel and Haken, Heesch worked on refining and shortening their proof, even after his retirement.
heinrich, heesch, june, 1906, july, 1995, german, mathematician, born, kiel, died, hanover, 1930, göttingen, worked, group, theory, 1933, heesch, witnessed, national, socialist, purges, university, staff, willing, become, member, national, socialist, organizat. Heinrich Heesch June 25 1906 July 26 1995 was a German mathematician He was born in Kiel and died in Hanover Heinrich Heesch 1930 In Gottingen he worked on Group theory In 1933 Heesch witnessed the National Socialist purges of university staff Not willing to become a member of the National Socialist organization of university teachers as required he resigned from his university position in 1935 and worked privately at his parents home in Kiel until 1948 During this time he did research on tilings In 1955 Heesch began teaching at Leibniz University Hannover and worked on graph theory In this period Heesch did pioneering work in developing methods for a computer aided proof of the then unproved four color theorem 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 Between 1967 and 1971 Heesch made several visits to the United States where bigger and faster computers were available working with Haken at University of Illinois at Urbana Champaign and with Karl Durre and Yoshio Shimamoto at Brookhaven National Laboratory During the crucial phase of his project the German national research fund DFG cancelled financial support After the 1977 success of Appel and Haken Heesch worked on refining and shortening their proof even after his retirement Contents 1 Works 2 Literature on Heinrich Heesch s work 3 See also 4 External linksWorks EditHeinrich Heesch Otto Kienzle Flachenschluss Berlin Gottingen Heidelberg Springer Verlag 1963 Heinrich Heesch Untersuchungen zum Vierfarbenproblem Bibliographisches Institut Mannheim 1969 Bigalke Hans Gunther Hrsg Heinrich Heesch Gesammelte Abhandlungen Bad Salzdetfurth 1986 Literature on Heinrich Heesch s work EditBigalke Hans Gunther Heinrich Heesch Kristallgeometrie Parkettierungen Vierfarbenforschung Basel 1988 See also EditHeesch s problemExternal links Edithttp www ifg uni kiel de eckenundkanten hk 02 de html Biography in German Retrieved from https en wikipedia org w index php title Heinrich Heesch amp oldid 1133403973, wikipedia, wiki, book, books, library,
