Infinite Intersections of open subschemes and the Hilbert scheme of points

Details Infinite Intersections of open subschemes and the Hilbert scheme of points Infinite Intersections of open subschemes and the Hilbert scheme of points

2002-05-23

arxiv.org/abs/math/0205239v1

Mathematics

Algebraic Geometry

Scientific paper

We study infinite intersections of open subschemes and the corresponding intersection of Hilbert schemes. If $\{U_i\}$ is the collection of open subschemes of a variety $X$ containing a fixed point $P$, then we show that the Hilbert functor of flat and finite families on the spectrum of the local ring of $P$ is given by the intersection of ${\Cal H}_i$, where ${\Cal H}_i$ is the Hilbert functor of flat and finite families on $U_i$. In particular we show that the Hilbert functor of flat and finite families on the spectrum of the local ring of $P$ is representable by a scheme.

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