Allen Hatcher

Allen Hatcher books and biography

Sponsored Links

Algebraic Topology By Hatcher

By Allen Hatcher

Download Details Report

Share this Book!

Allen Hatcher

The image “” cannot be displayed, because it contains errors.

Allen Edward Hatcher is an American topologist and also a noted author. His book Algebraic Topology is oft-praised and the first part of a series.

He received his Ph.D. under the advisorship of Hans Samelson at Stanford University in 1971. He went on to become a professor in UCLA. Since 1985 he has been a professor at Cornell University. His students include Ulrich Oertel, Kiyoshi Igusa, Mark Brittenham, Charles Delman, and Rachel Roberts.


Mathematical contributions

His contributions include a proof of the Smale conjecture for the 3-sphere and important results in the theory of surfaces and 3-manifolds.


Perhaps among his most recognized results in 3-manifolds concern the classification of incompressible surfaces in certain 3-manifolds and their boundary slopes. Bill Floyd and Hatcher classified all the incompressible surfaces in punctured-torus bundles over the circle. Bill Thurston and Hatcher classified the incompressible surfaces in 2-bridge knot complements. As corollaries, this gave more examples of non-Haken, non-Seifert fibered, irreducible 3-manifolds and extended the techniques and line of investigation started in Thurston's Princeton lecture notes. Hatcher also showed that irreducible, boundary-irreducible 3-manifolds with toral boundary have at most "half" of all possible boundary slopes resulting from essential surfaces. In the case of one torus boundary, one can conclude that the number of slopes given by essential surfaces is finite.

Hatcher is also a pioneer in the theory of essential laminations in 3-manifolds. He invented the notion of "end-incompressibility" and several of his students, such as Mark Brittenham, Charles Delman, and Rachel Roberts, have made important contributions to the theory.


Hatcher and Thurston exhibited an algorithm to produce a presentation of the mapping class group of a closed, orientable surface. Their work relied on the notion of a cut system and moves that relate any two systems.

Selected publications


  • Hatcher and Thurston, A presentation for the mapping class group of a closed orientable surface. Topology 19 (1980), no. 3, 221--237.
  • Hatcher, On the boundary curves of incompressible surfaces. Pacific J. Math. 99 (1982), no. 2, 373--377.
  • Floyd and Hatcher, Incompressible surfaces in punctured-torus bundles. Topology Appl. 13 (1982), no. 3, 263--282.
  • Hatcher and Thurston, Incompressible surfaces in $2$-bridge knot complements. Invent. Math. 79 (1985), no. 2, 225--246.
  • Hatcher, A proof of a Smale conjecture, ${rm Diff}(Ssp{3})simeq {rm O}(4)$. Ann. of Math. (2) 117 (1983), no. 3, 553--607.


Hatcher, Allen, Algebraic topology. Cambridge University Press, Cambridge, 2002. xii+544 pp. ISBN 0-521-79160-X and ISBN 0-521-79540-0

Books in progress

Vector Bundles and K-Theory

Spectral Sequences in Algebraic Topology

Basic Topology of 3-Manifolds

This article might use material from a Wikipedia article, which is released under the Creative Commons Attribution-Share-Alike License 3.0.

Convert any Books to Kobo

* Notice to all users: You can export our search engine to your blog, website, facebook or my space.

message of the week Message of The Week

Bookyards Facebook, Tumblr, Blog, and Twitter sites are now active. For updates, free ebooks, and for commentary on current news and events on all things books, please go to the following:

Bookyards at Facebook

Bookyards at Twitter

Bookyards at Pinterest

Bookyards at Tumblr

Bookyards blog

message of the daySponsored Links