Retraction
From Encyclopedia of Mathematics
A continuous mapping 
of a topological space 
into a subspace 
which is the identity on 
, i.e. is such that 
for all 
.
Comments
Cf. Retract of a topological space for more information and references.
How to Cite This Entry:
Retraction. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Retraction&oldid=11680
Retraction. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Retraction&oldid=11680
This article was adapted from an original article by M.I. Voitsekhovskii (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article