拟阵M+M^e中集的结构与关系

The Structure and Relation of Set in Matriod M+M^e

研究拟阵M+Me中集的结构与关系。应用单扩张与模割的一一对应,讨论了X∈L(M+Me)的各种情况。讨论了在单平行扩张下拟阵M+Me,模割M,主模割MF的等价关系。给出了拟阵主扩张M+Fe中基与极小圈的表示。

The structure and relation of set in matriod M＋Me is studied. By the relation of single-element extension and modular cut,every case of X∈L（M＋Me） is discussed,and then the equivalence relationship of modular cut M,principal modular cut MFand matriod M＋Me is discussed. Finally the representation of base and circuit under single element parallel extension is given.