American mathematician
Allen Edward Hatcher (born October 23, 1944) is an American mathematician specializing in geometric topology .
Hatcher was born in Indianapolis , Indiana .[ 1] B.A. and B.Mus. from Oberlin College in 1966,[ 2] Stanford University , where he received his Ph.D. in 1971.[ 1] A K2 Obstruction for Pseudo-Isotopies , was written under the supervision of Hans Samelson .[ 3]
Afterwards, Hatcher went to Princeton University , where he was an NSF postdoc for a year, then a lecturer for another year, and then Assistant Professor from 1973 to 1979. He was also a member of the Institute for Advanced Study in 1975–76 and 1979–80.[ 1] University of California, Los Angeles as an assistant professor in 1977. From 1983 he has been a professor at Cornell University ; he is now a professor emeritus .[ 4]
In 1978 Hatcher was an invited speaker at the International Congress of Mathematicians in Helsinki.[ 5]
In 1983 Hatcher proved the Smale conjecture , named after Stephen Smale .[ 6] [ 7]
Selected publications [ edit ] Allen Hatcher and William Thurston , A presentation for the mapping class group of a closed orientable surface, Topology 19 (1980), no. 3, 221–237.
Allen Hatcher, On the boundary curves of incompressible surfaces, Pacific Journal of Mathematics 99 (1982), no. 2, 373–377.
William Floyd and Allen Hatcher, Incompressible surfaces in punctured-torus bundles, Topology and its Applications 13 (1982), no. 3, 263–282.Allen Hatcher and William Thurston , Incompressible surfaces in 2-bridge knot complements, Inventiones Mathematicae 79 (1985), no. 2, 225–246.
Allen Hatcher, A proof of the Smale conjecture,
D
i
f
f
(
S
3
)
≃
O
(
4
)
{\displaystyle \mathrm {Diff} (S^{3})\simeq {\mathrm {O} }(4)}
Annals of Mathematics (2) 117 (1983), no. 3, 553–607.
^ a b c "Annual Report for the Fiscal Year July 1, 1979–June 30, 1980" (PDF) . Institute for Advanced Study . 1980. p. 41. Retrieved January 3, 2021 .^ Glaser, Linda B. "Mathematician Allen Hatcher receives inaugural book prize" . Retrieved 21 February 2025 . ^ Allen Hatcher at the Mathematics Genealogy Project ^ "Allen Hatcher, Professor Emeritus" . Department of Mathematics, Cornell University .^ "ICM Plenary and Invited Speakers" . International Mathematical Union. Retrieved 2024-07-03 .^ Visualization and Mathematics: Experiments, Simulations and Environments. pg. 5. Germany: Springer Berlin Heidelberg, 2012.^ Hatcher, Allen E. (May 1983). "A Proof of the Smale Conjecture, Diff(S3 ) ≃ O(4)". The Annals of Mathematics . 117 (3): 553. doi :10.2307/2007035 . JSTOR 2007035 .
International National Academics Other
