Download PDF

retract∗
rspuzio†
2013-03-21 13:22:05
Let X be a topological space and Y a subspace of X. If there exists a
continuous map r : X → Y such that r(y) = y for all y ∈ Y , then we say Y is a
retract of X and r is a retraction.
∗ hRetracti created: h2013-03-21i by: hrspuzioi version: h31693i Privacy setting: h1i
hDefinitioni h54C15i
† 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.
1