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Allen Hatcher
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
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Allen Hatcher (* 1944 in Indianapolis)cite-ref-1[1] ist ein US-amerikanischer Mathematiker, der sich mit geometrischer Topologie befasst.
Hatcher wurde 1971 bei Hans Samelson an der Stanford University promoviert (A K 2 {\displaystyle K_{2}} obstruction to pseudo-isotopies).cite-ref-2[2] Er war Associate Professor an der University of California, Los Angeles, und ist seit 1983 Professor an der Cornell University. 1976 erhielt er ein Forschungsstipendium der Alfred P. Sloan Foundation (Sloan Research Fellowship).
1975/76 und 1979/80 war er am Institute for Advanced Study.
1983 bewies er eine Vermutung von Stephen Smale (1959) ΓΌber die Diffeomorphismen-Gruppe der 3-SphΓ€recite-ref-3[3]. Er klassifizierte inkompressible FlΓ€chen in verschiedenen 3-Mannigfaltigkeiten, unter anderem mit William Floyd in BΓΌndeln von punktierten Tori ΓΌber dem Kreis und mit William Thurston in 2-BrΓΌcken-Knoten-Komplementen. Mit Thurston gab er einen Algorithmus fΓΌr die PrΓ€sentation der Abbildungsklassengruppe geschlossener orientierbarer FlΓ€chen an (1980). Er arbeitete auch ΓΌber Pseudo-Isotopie und K-Theorie.
Er ist auch als Verfasser von Topologie-LehrbΓΌchern bekannt (teilweise online von ihm zur VerfΓΌgung gestellt).
Contents
β’ Schriften
β’ Homepage
β’ Einzelnachweise
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
Schriften
β’ Algebraic Topology, Cambridge University Press 2002
β’ mit John Wagoner Pseudo-isotopies of compact manifolds, SocietΓ© MathΓ©matiques de France, 1973
β’ Higher simple homotopy theory, Annals of Mathematics, Band 102, 1975, S. 101β137.
β’ mit Thurston A presentation for the mapping class group of a closed orientable surface, Topology, Band 19, 1980, S. 221β237.
β’ On the boundary curves of incompressible surfaces, Pacific J. Math., Band 99, 1982, S. 373β377.
β’ mit William Floyd Incompressible surfaces in punctured-torus bundles, Topology and its Applications, Band 13, 1982, S. 263β282.
β’ A proof of the Smale conjecture, D i f f ( S 3 ) β β O ( 4 ) {\displaystyle \mathrm {Diff} (S^{3})\simeq {\mathrm {O} }(4)} , Annals of Mathematics, Band 117, 1983, S. 553β607.
β’ mit Thurston Incompressible surfaces in 2-bridge knot complements, Inventiones Mathematicae, Band 79, 1985, S. 225β246
Homepage
β’ Homepage an der Cornell University
β’ Webseite mit seinen Online BΓΌchern
Einzelnachweise