3 Noun 4 Verb 0 Adj. 0 Adv.
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ENretractNoun
EN
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.
retraction
bn:01399627n Concept
English:
topology
EN
In category theory, a branch of mathematics, a section is a right inverse of some morphism.
sectionretractionsection and retraction
bn:00181691n Concept
English:
category theory
homological algebra
EN
In mathematics, in the field of group theory, a subgroup of a group is termed a retract if there is an endomorphism of the group that maps surjectively to the subgroup and is the identity on the subgroup.
bn:03277080n Concept
English:
group theory
ENretractVerb
EN
Formally reject or disavow a formerly held belief, usually under pressure
abjurerecantforswear
bn:00082141v Concept
EN
Pull away from a source of disgust or fear
shrink back
bn:00092952v Concept
EN
Use a surgical instrument to hold open (the edges of a wound or an organ)
pull backdraw back
bn:00087268v Concept
EN
Pull inward or towards a center
draw in
bn:00087270v Concept