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
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文献类型:
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作者:
M. Kondo
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.