﻿ retract - English German Dictionary        ## retract

1-20 21-30 English German
retract sich zurückziehen
to retract vt. einfahren einziehen widerrufen zurücknehmen zurückziehen retractable abklappbar abschwenkbar retractable adj. einfahrbar einziehbar versenkbar zurückziehbar retracted adj. eingezogen retracted nipple subst.   die Hohlwarze f die Schlupfwarze f retraction subst. die Einziehung f die Retraktion f die Rücknahme f retraction subst. der Widerruf m retraction subst. das Einziehen n accesses today: 119 289.966 words in the dictionary accesses total: 70.023

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Retract aus Wikipedia. Zum Beitrag

Deformation retract - Wikipedia, the free encyclopedia a:lang(ar),a:lang(ckb),a:lang(fa),a:lang(kk-arab),a:lang(mzn),a:lang(ps),a:lang(ur){text-decoration:none}a.new,#quickbar a.new{color:#ba0000} /* cache key: enwiki:resourceloader:filter:minify-css:4:c88e2bcd56513749bec09a7e29cb3ffa */ Deformation retract From Wikipedia, the free encyclopedia   (Redirected from Retract) Jump to: , "Retract" redirects here. For other meanings including concepts in group theory and category theory, see Retraction (disambiguation). In , as the name suggests, "retracts" an entire space into a subspace. A deformation retraction is a map which captures the idea of continuously shrinking a space into a subspace.

## Definitions

### Retract

Let X be a topological space and A a subspace of X. Then a continuous map is a retraction if the restriction of r to A is the identity map on A; that is, r(a) = a for all a in A. Equivalently, denoting by the inclusion, a retraction is a continuous map r such that that is, the composition of r with the inclusion is the identity of A. Note that, by definition, a retraction maps X onto A. A subspace A is called a retract of X if such a retraction exists. For instance, any space retracts to a point in the obvious way (the constant map yields a retraction). If X is hausdorff, then A must be closed. A space X is known as an absolute retract (or AR) if for every mehr

Retract aus Wikipedia. Zum Beitrag

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