Abstract
A walk with no arc repeated which begins and ends with forward arcs, in which the arcs alternate between forward and backward arcs, is called forward antidirected trail. A digraph D with order at least three containing a forward antidirected (x, y)-trail for every pair of distinct vertices x, y of D is antistrong. In this paper, we show that the Cartesian product of two antistrong digraphs is antistrong. Moreover, one of the results is that the Lexicographic product of an antistrong digraph and a digraph is antistrong. Finally, the subject is researched to give a necessary and sufficient condition to decide whether a tournament is antistrong.
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Acknowledgements
The authors would like to express their gratitude to the editor and anonymous reviewers for their valuable comments and constructive suggestions on the original manuscript. This research is supported by the Natural Science Foundation of Xinjiang Province, China (Nos. 2020D04046, 2021D01C116).
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The research is supported by NSFXJ (No. 2020D04046, 2021D01C116)
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Yuan, L., Meng, J. & Sabir, E. The Antistrong Property for Special Digraph Families. Graphs and Combinatorics 37, 2511–2519 (2021). https://doi.org/10.1007/s00373-021-02375-w
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DOI: https://doi.org/10.1007/s00373-021-02375-w