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属性约简是粗糙集理论的重要研究方向之一。本文针对决策表,从三支决策的角度提出了保持负域不变的约简及保持边界域不变的约简,并研究保持负域不变的约简、保持边界域不变的约简与基于粗糙集理论代数角度的约简之间的关系。
Attribute reduction is one of the important research directions of rough set theory. In this paper, aiming at the decision table, this paper proposes to keep invariant negative reduction of the negative domain and maintain invariant reduction of the boundary domain from the perspective of the three decision-making, and to study reducing the invariant of the negative domain while maintaining the reduction of the negative domain And the reduction based on algebraic perspective of rough set theory.