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arXiv math/0507372math.ACmath.CO
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半序集上的代数

On algebras associated to partially ordered sets

Morten Brun, Tim Roemer

摘要:

我们继续研究有限偏序集上环的层。我们提出的例子,其中的环的整体瓣符合复曲面的面孔环,由单项式理想和代数的多项式环与拉直法律。我们证明了一个秩选择定理,它推广了著名的Stanley-Reisner环的秩选择定理。最后,我们确定了一个明确的介绍某些全球环的部分。

英文摘要:

We continue the study on sheaves of rings on finite posets. We present examples where the ring of global sections coincide with toric faces rings, quotients of a polynomial ring by a monomial ideal and algebras with straightening laws. We prove a rank-selection theorem which generalizes the well-known rank-selection theorem of Stanley-Reisner rings. Finally, we determine an explicit presentation of certain global rings of sections.

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