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拟阵的确定
引用本文:程茜.拟阵的确定[J].青海师范大学学报(自然科学版),2008(1):15-18.
作者姓名:程茜
作者单位:陕西师范大学,数学系,陕西,西安,710062
摘    要:本文定义了拟阵的差导算子,证明了对每个给定的有限集X,可以给加(X)(即X上拟阵差导算子的全体)上赋予适当的序≤使得(DD(X),≤)与(CL(X),≤)(即X上拟阵闭包算子的全体),(F(X),≤)(即X上拟阵闭集族的全体)之间是完备格同构的.

关 键 词:拟阵  拟阵差导算子  完备格同构
文章编号:1001-7542(2008)01-0015-04
修稿时间:2007年12月25

The determinination of matroid
CHENC Qian.The determinination of matroid[J].Journal of Qinghai Normal University(Natural Science Edition),2008(1):15-18.
Authors:CHENC Qian
Institution:CHENG Qian (College of Mathematics and Information Science, Shaanxi Nonmal University,Xi'an 710062,China)
Abstract:The concepts of difference derived operator are introduced in this paper.It is proved that ,for a given finite set X, appropriate order relations ≤ can be defined on DD(X) (the set of all matroids difference derived operators on X), CL(X) (the set of all matroids closure operators on X) and F(X) (the set of all matroids closed sets on X),respetively, so that both (CL(X),≤) and (F(X),≤) are complete lattices which are isomorphic to (DD(X),≤) (the set of all matroids difference derived operators on the finite set X).
Keywords:matroids  matroids difference derived operators  complete lattices isomorphie
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