Duality respecting representations and compatible complexity measures for gammoids

نویسندگان

چکیده

We show that every gammoid has special digraph representations, such a representation of the dual may be easily obtained by reversing all arcs. In an informal sense, duality notion poset applied to commutes with operation forming gammoid. use these representations in order define complexity measure for gammoids, classes gammoids bounded are closed under duality, minors, and direct sums.

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ژورنال

عنوان ژورنال: Discrete Mathematics

سال: 2021

ISSN: ['1872-681X', '0012-365X']

DOI: https://doi.org/10.1016/j.disc.2020.112157