🌐中文EnglishDeutschEspañolFrançaisItalianoPortuguêsРусский한국어中文日本語EntityQ7595945· pop 5· linked from 54 articles叠形Also known as 2-sheaf层的范畴化及推广;其为容许有效下降的纤维范畴Available in 5 languagesDeutsch中文日本語한국어via Wikidata sitelinks · CC0ConnectionsSpringer Science+Business MediaEntitypullbackEntityCategoriesAlgebraic geometryCategory theoryStacks (mathematics)