Back Zusammenziehbarer Raum German Espacio contráctil Spanish فضای انقباضپذیر Persian Espace contractile French מרחב כוויץ HE Spazio contraibile Italian 可縮空間 Japanese 축약 가능 공간 Korean Samentrekbare ruimte Dutch Przestrzeń ściągalna Polish
In mathematics, a topological space X is contractible if the identity map on X is null-homotopic, i.e. if it is homotopic to some constant map.[1][2] Intuitively, a contractible space is one that can be continuously shrunk to a point within that space.
- ^ Munkres, James R. (2000). Topology (2nd ed.). Prentice Hall. ISBN 0-13-181629-2.
- ^ Hatcher, Allen (2002). Algebraic Topology. Cambridge University Press. ISBN 0-521-79540-0.
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