Difference between revisions of "Homotopy"
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Revision as of 05:27, 20 February 2016
In topology, two continuous functions from one topological space to another are called homotopic (Greek ὁμός (homós) = same, similar, and τόπος (tópos) = place) if one can be "continuously deformed" into the other.
Such a deformation is a homotopy between the two functions.
Description
A notable use of homotopy is the definition of homotopy groups and cohomotopy groups, important invariants in algebraic topology.
In practice, there are technical difficulties in using homotopies with certain spaces. Algebraic topologists work with compactly generated spaces, CW complexes, or spectra.
See also
External links
- Homotopy @ Wikipedia
