作　　者： ;

机构地区： 上海交通大学

出　　处： 《Chinese Quarterly Journal of Mathematics》 1992年第1期1-4,共4页

摘　　要： Ditroid is a directed version of matroid. In this paper we investigate transversal theory of ditroids. Directed versions of Rado-Hall and Edmonds-Fulkerson theorems are obtained. Our results provide partial answers to two questions raised by L. Qi.

领　　域： [理学] [理学]