Infinite Gammoids: Minors and Duality

Electronic Journal Of Combinatorics

Seyed Hadi Afzali Borujeni¹ 

关键词: Infinite matroids;    Gammoids;    Transversal matroids;    Matchings;    Linkages;    Contractions;   

DOI  :  

学科分类：离散数学和组合数学

来源: Electronic Journal Of Combinatorics

【 摘 要 】

This sequel to Afzali Borujeni et. al. (2015) considers minors and duals of infinite gammoids. We prove that the class of gammoids defined by digraphs not containing a certain type of substructure, called an outgoing comb, is minor-closed. Also, we prove

【 授权许可】

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