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. 2019 Aug 29;9:12575. doi: 10.1038/s41598-019-49075-3

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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The propagation of defector fronts in the stag-hunt game, as obtained for T₂ = 0.92, S₂ = −0.5, and τ = 100. The evolution starts from a horizontal strip od blue cooperators, marked by white dashed lines. After 200 (left), 400 (middle), and 600 (right) steps the original strip shrinks gradually because the invasion of defectors during the (T₂, S₂) period is more effective than the invasion of cooperators during the (T₁ = 0.9, S₁ = 0.1) period. We here used L = 400 linear size for clarity, as in the corresponding animations obtained with smaller values of τ^76–78.