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absolute retract∗
rspuzio†
2013-03-21 17:59:25
A topological space X is an absolute retract if, for every embedding of X as
a closed subset of a normal space Y , the image of X is a retract of Y .
A topological space X is an absolute neighborhood retract if, for every embedding of X as a closed subset of a normal space Y , the image of X is a
neighborhood retract of Y .
∗ hAbsoluteRetracti created: h2013-03-21i by: hrspuzioi version: h36253i Privacy setting:
h1i hDefinitioni h54A99i
† This text is available under the Creative Commons Attribution/Share-Alike License 3.0.
You can reuse this document or portions thereof only if you do so under terms that are
compatible with the CC-BY-SA license.
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