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Erschienen in: Journal of Combinatorial Optimization 3/2021

15.05.2019

Tropical paths in vertex-colored graphs

verfasst von: Johanne Cohen, Giuseppe F. Italiano, Yannis Manoussakis, Nguyen Kim Thang, Hong Phong Pham

Erschienen in: Journal of Combinatorial Optimization | Ausgabe 3/2021

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Abstract

A subgraph of a vertex-colored graph is said to be tropical whenever it contains each color of the initial graph. In this work we study the problem of finding tropical paths in vertex-colored graphs. There are two versions for this problem: the shortest tropical path problem (STPP), i.e., finding a tropical path with the minimum total weight, and the maximum tropical path problem (MTPP), i.e., finding a path with the maximum number of colors possible. We show that both versions of this problems are NP-hard for directed acyclic graphs, cactus graphs and interval graphs. Moreover, we also provide a fixed parameter algorithm for STPP in general graphs and several polynomial-time algorithms for MTPP in specific graphs, including bipartite chain graphs, threshold graphs, trees, block graphs, and proper interval graphs.

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Metadaten
Titel
Tropical paths in vertex-colored graphs
verfasst von
Johanne Cohen
Giuseppe F. Italiano
Yannis Manoussakis
Nguyen Kim Thang
Hong Phong Pham
Publikationsdatum
15.05.2019
Verlag
Springer US
Erschienen in
Journal of Combinatorial Optimization / Ausgabe 3/2021
Print ISSN: 1382-6905
Elektronische ISSN: 1573-2886
DOI
https://doi.org/10.1007/s10878-019-00416-y

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