本篇論文的目標是找出ADE型奇點之米爾諾纖維中的封閉正合拉格朗日子流形。我們將會回顧Kronheimer的研究結果，證明這些米爾諾纖維可以被描述為ALE空間。此外，我們也會回顧Ritter關於辛上同調的工作，證明唯一的封閉正合拉格朗日子流形是球面。

The goal of this paper is to identify the closed exact Lagrangian submanifolds in the Milnor fibers of ADE singularities. We will recall Kronheimer's results that describe these Milnor fibers as ALE spaces. Additionally, we will review Ritter's work on symplectic cohomologies, demonstrating that the only closed exact Lagrangian submanifolds are spheres.

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