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retract$70040$ - translation to greek
CONTINUOUS MAPPING FROM A TOPOLOGICAL SPACE INTO A SUBSPACE
Deformation retraction; Neighborhood retract; Strong deformation retract; Absolute retract; Absolute neighborhood retract; Defamation retraction; Neighborhood deformation retract; Deformation retract; NDR-pair; No-retraction theorem; Retract (topology)
retract
v. παλινωδώ, ανακαλώ, αποσύρω, αποσύρομαι, υπαναχωρώ
Definition
retract
(retracts, retracting, retracted)
1.
If you retract something that you have said or written, you say that you did not mean it. (FORMAL)
Mr Smith hurriedly sought to retract the statement, but it had just been broadcast on national radio...
He's hoping that if he makes me feel guilty, I'll retract.
VERB: V n, V
• retraction (retractions)
Miss Pearce said she expected an unqualified retraction of his comments within twenty four hours.
= withdrawal
N-COUNT: usu sing
2.
When a part of a machine or a part of a person's body retracts or is retracted, it moves inwards or becomes shorter. (FORMAL)
Torn muscles retract, and lose strength, structure, and tightness.
VERB: V, also V n
Wikipedia
Retraction (topology)
In topology, a branch of mathematics, a retraction is a continuous mapping from a topological space into a subspace that preserves the position of all points in that subspace. The subspace is then called a retract of the original space. A deformation retraction is a mapping that captures the idea of continuously shrinking a space into a subspace.
An absolute neighborhood retract (ANR) is a particularly well-behaved type of topological space. For example, every topological manifold is an ANR. Every ANR has the homotopy type of a very simple topological space, a CW complex.
