doi:10.1016/B978-044482375-5/50028-6
Hess, Kathryn
A history of rational homotopy theory
Rational homotopy theory is the study of topological spaces “modulo torsion”. When rational homotopy theorists calculate algebraic invariants of a topological space, such as its homotopy or homology groups, they retain only the nontorsion information. Algebraic models of topological spaces are the most important tools of the rational homotopy theorist.
2008-11-14T15:00:13Z
http://infoscience.epfl.ch/record/129261