【摘要】 本文由经典集合、模糊集合和可拓集合的产生、联系和区别出发 ,着重介绍一种全新的集合——可拓集合。指出集合论的多样性和集合思想的充实与更新 ,拓宽了应用领域中多学科、多方法的交叉与互补。提出了农业资源可拓利用的新思路更多还原

【Abstract】 Based on the origination, relationship and difference among cantor set, fuzzy set and extension set, this paper is focused on describing a novel set —— extension set. The authors point out that the variety of set theory and the richness and innovation of set idea extended the intercrossing and complement each other of various subject and methodology in applied field, as well as the novel thinking about the extended utilization of agricultural resources .更多还原