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(Q60727552)
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English
section and retraction
two kinds of possible inverses of a morphism in a category
left and right inverses
left and right inverse morphisms
section and cosection
coretraction and retraction
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has part(s)
section
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retraction
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/g/1hc0gb1w0
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dewiki
Retraktion und Koretraktion
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역사상
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