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arXiv 1003.4935math.FA
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一类Hilbert模的奇点的奇点的分解

Resolution of singularities for a class of Hilbert modules

Shibananda Biswas, Gadadhar Misra

摘要:

利用多项式环上Hilbert模的层理论模型给出了“刚性定理”的一个简短证明。描述了一大子模类的联合核。希尔伯特模中的齐次(多项式)理想$\mathcal I$的完备化$[\mathcal I]$是一个子模,其联合核被证明是$$ \{p_i(\tfrac{\partial}{\partial \bar{w}_1}, ..., \tfrac{\partial}{\partial \bar{w}_m}) K_{[\mathcal I]}(\cdot,w)|_{w=0}, 1 \leq i \leq n\}, $$的形式,其中$K_{[\mathcal I]}$是子模$[\mathcal I]$的再生核,$p_1, ..., p_n$是理想$\mathcal I$的某个最小“规范生成元集”。证明包括一个算法,用于构建这个典型的一套发电机,这是唯一确定的模线性关系,齐次理想。一组易于计算的不变量,这些子模块,使用monoidal变换,提供。给出了几个例子来说明这些不变量的显式计算。

英文摘要:

A short proof of the "Rigidity theorem" using the sheaf theoretic model for Hilbert modules over polynomial rings is given. The joint kernel for a large class of submodules is described. The completion $[\mathcal I]$ of a homogeneous (polynomial) ideal $\mathcal I$ in a Hilbert module is a submodule for which the joint kernel is shown to be of the form $$ \{p_i(\tfrac{\partial}{\partial \bar{w}_1}, ..., \tfrac{\partial}{\partial \bar{w}_m}) K_{[\mathcal I]}(\cdot,w)|_{w=0}, 1 \leq i \leq n\}, $$ where $K_{[\mathcal I]}$ is the reproducing kernel for the submodule $[\mathcal I]$ and $p_1, ..., p_n$ is some minimal "canonical set of generators" for the ideal $\mathcal I$. The proof includes an algorithm for constructing this canonical set of generators, which is determined uniquely modulo linear relations, for homogeneous ideals. A set of easily computable invariants for these submodules, using the monoidal transformation, are provided. Several examples are given to illustrate the explicit computation of these invariants.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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