论文标题
在商lift Matroid关系上
On the Quotient-Lift Matroid Relation
论文作者
论文摘要
众所周知，当且仅当l的每个电路都是M的某些电路的结合时，矩形L是Matroid M的提升。在本文中，我们提供了更简单的证明此重要定理。我们还描述了在同一地面组合的两个不同等级的基型矩形上的离散均匀定理。
It is well known that a matroid L is a lift of a matroid M if and only if every circuit of L is the union of some circuits of M. In this paper we give a simpler proof of this important theorem. We also described a discrete homotopy theorem on two matroids of different ranks on the same ground set.
