ITM Web Conf.
Volume 25, 20192018 3rd International Conference on Intelligent Computing and Cognitive Informatics (ICICCI 2018)
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Feedback Numbers of Goldberg Snark, Twisted Goldberg Snarks and Related Graphs
School of Information Engineering, Dalian Ocean University, Dalian, 116023, China
a Corresponding author: email@example.com
A subset of vertices of a graph G is called a feedback vertex set of G if its removal results in an acyclic subgraph. The minimum cardinality of a feedback vertex set is called the feedback number. In this paper, we determine the exact values of the feedback numbers of the Goldberg snarks Gn and its related graphs Gn*, Twisted Goldberg Snarks TGn and its related graphs TGn*. Let f(n) denote the feedback numbers of these graphs, we prove that f(n)=2n+1, for n≥3.
© The Authors, published by EDP Sciences, 2019
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