Beilinson ’ s construction of nearby cycles and gluing

Beilinson ’ s construction of nearby cycles and gluing
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贝林森建造附近的自行车和粘合

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发表时间:
2017
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通讯作者:
March
March
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作者:
S. Morel;March

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我们固定一个字段k。我们将考虑的所有方案都是分离的,并且是k上的有限型。如果X是一个概型,我们写Dc(X)为X上有界可构造的`-adic复形范畴,或者,如果k = C,为X(C)上有界可构造的复形范畴。(The形式主义在这两种情况下都行得通。在这两种情况下,我们都将Perv(X)写为Dc(X)上的自对偶反常结构的核心。当我们后来说“精确”时,它总是被理解为“对反常的t结构精确”。这一段的标准参考是BeilinsonBernstein-Deligne的书[2]。
We fix a field k. All the schemes we will consider will be separated and of finite type over k. If X is a scheme, we write D c(X) for the category of bounded constructible `-adic complexes on X or, if k = C, for bounded constructible complexes on X(C). (The formalism will work in both cases.) In both cases, we’ll write Perv(X) for the heart of the selfdual perverse tstructure on D c(X). When we say “exact” later, it is always understood to mean “exact for the perverse t-structure”. The standard reference for this paragraph is the book [2] by BeilinsonBernstein-Deligne.