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S-equivalence is an equivalence relation on the families of semistable vector bundles on an algebraic curve. == Definition == Let ''X'' be a projective curve over an algebraically closed field ''k''. A vector bundle on ''X'' can be considered as a locally free sheaf. Every semistable locally free ''E'' on ''X'' admits a Jordan-Hölder filtration with stable subquotients, i.e. : where are locally free sheaves on ''X'' and are stable. Although the JH-Filtration is not unique, the subquotients are, which means that is unique up to isomorphism. Two semistable locally free sheaves ''E'' and ''F'' on ''X'' are ''S''-equivalent if ''gr E'' ≅ ''gr F''. 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「S-equivalence」の詳細全文を読む スポンサード リンク
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