Algebraic Approach to Generalized Rough Sets

Algebraic Approach to Generalized Rough Sets
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DOI:
10.1007/11548669_14
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发表时间:
2005-08
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通讯作者:
M. Kondo
M. Kondo
中科院分区:
其他
文献类型:
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作者:
M. Kondo

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本文引入了广义代数下(上)逼近算子的概念,给出了它的刻划定理。也就是说,对于任何具有原子集的原子完备布尔代数,映射是代数下近似算子当且仅当存在二元关系使得L=R−,其中−是由二元关系R定义的下近似。这推广了姚给出的结果。
In this paper, we introduce the notion of generalized algebraic lower (upper) approximation operator and give its characterization theorem. That is, for any atomic complete Boolean algebrawith the setof atoms, a mapis an algebraic lower approximation operator if and only if there exists a binary relationRonsuch thatL=R−, whereR−is the lower approximation defined by the binary relationR. This generalizes the results given by Yao.