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幾何學入面,局部系統(local system)即係局部常值嘅層(en:locally constant sheaf);咁即係話,渠係一層,其中層結構畀嘅限制影射(restriction maps)都係恆等影射。
如果我地攞咗一舊向量叢,而且響上面定義一個平坦聯絡(en:flat connection),咁啲局部平截面(flat local sections)所構成嘅層就係一局部系統。
局部系統嘅單值化monodromy研究,係好多數學課題嘅基本問題。
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