A Commutative Algebra for Oriented Matroids
A Commutative Algebra for Oriented Matroids
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有向拟阵的交换代数
DOI:
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发表时间:
2002
影响因子:
0.8
通讯作者:
R. Cordovil
中科院分区:
文献类型:
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作者:
R. Cordovil
AbstractLet V be a vector space of dimension d over a field K and let A be a central arrangement of hyperplanes in V. To answer a question posed by K. Aomoto, P. Orlik and H. Terao construct a commutative K -algebra U(A) in terms of the equations for the hyperplanes of A. In the course of their work the following question naturally occurred:
\circ Is U(A) determined by the intersection lattice L(A) of the hyperplanes of A?
We give a negative answer to this question. The theory of oriented matroids gives rise to a combinatorial analogue of the algebra of Orlik—Terao, which is the main tool of our proofs.