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Modulgarbe
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
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Eine Modulgarbe ΓΌber einem geringten Raum ist in der Mathematik eine Verallgemeinerung des Begriffs eines Moduls ΓΌber einem Ring.
Contents
β’ Definition
β’ Literatur
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
Definition
Es sei ( X , O X ) {\displaystyle (X,{\mathcal {O}}_{X})} ein geringter Raum (es ist also X {\displaystyle X} ein topologischer Raum und O X {\displaystyle {\mathcal {O}}_{X}} eine Garbe von Ringen ΓΌber X {\displaystyle X} ). Eine Garbe F {\displaystyle {\mathcal {F}}} von abelschen Gruppen ΓΌber X {\displaystyle X} heiΓt eine O X {\displaystyle {\mathcal {O}}_{X}} -Modulgarbe (oder auch Garbe von O X {\displaystyle {\mathcal {O}}_{X}} -Moduln) wenn fΓΌr jedes offene U β β X {\displaystyle U\subset X} die abelsche Gruppe F ( U ) {\displaystyle {\mathcal {F}}(U)} ein O X ( U ) {\displaystyle {\mathcal {O}}_{X}(U)} -Modul ist und die Strukturhomomorphismen von F {\displaystyle {\mathcal {F}}} und O X {\displaystyle {\mathcal {O}}_{X}} vertrΓ€glich sind.
Literatur