{"72615":{"#nid":"72615","#data":{"type":"event","title":"The emergence of cooperation in the evolutionary spatial prisoners\u0027 dilemma on a path or cycle","body":[{"value":"\u003Cp\u003ETITLE: The emergence of cooperation\n          in the evolutionary spatial prisoners\u0027 dilemma on a path or\n          cycle\u003C\/p\u003E\u003Cp\u003ESPEAKER: Prof. Jan van Vuuren, Univ. of Stellenbosch, South Africa\u003C\/p\u003E\u003Cp\u003EABSTRACT:\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;In\n              this talk we consider the\u0026nbsp;\u003Cem\u003EEvolutionary Spatial\n                Prisoners\u0027 Dilemma\u003C\/em\u003E\u0026nbsp;(ESPD) in which players are\n              modelled by the vertices of an underlying graph\u0026nbsp;\u003Cem\u003EG\u003C\/em\u003E\u0026nbsp;representing\n              some spatial organisational structure amongst the players.\n              During each round of the ESPD every pair of adjacent\n              players in\u0026nbsp;\u003Cem\u003EG\u003C\/em\u003E\u0026nbsp;play a classical prisoners\u0027 dilemma\n              against each other, and they update their strategies from\n              one round to the next based on the perceived success (as\n              measured by pay-off values) achieved by the strategies of\n              their neighbours during the previous round. In this way\n              players are able to adapt and learn good strategies from\n              each other as the game progresses, without understanding\n              why these strategies are good. We characterise all steady\n              states of the ESPD for the two cases where\u0026nbsp;\u003Cem\u003EG\u003C\/em\u003E\u0026nbsp;is a\n              path or a cycle, and we also characterise those initial\n              states that lead to the emergence of persistent substates\n              of cooperation over time. We finally determine\n              analytically (\u003Cem\u003Ei.e.\u003C\/em\u003E\u0026nbsp;without using simulation) the\n              probability that the game\u0027s states will evolve from a\n              randomly generated initial state towards a steady state\n              which accommodates some form of persistent cooperation.\u003C\/p\u003E\u003Cp\u003EJoint work with Alewyn Burger \u0026amp; Martijn\n          van der Merwe\u0026nbsp; \u0026nbsp;\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"The emergence of cooperation in the evolutionary spatial prisoners\u0027 dilemma on a path or cycle"}],"uid":"27187","created_gmt":"2011-11-10 12:23:56","changed_gmt":"2016-10-08 01:56:37","author":"Anita Race","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2012-01-10T10:00:00-05:00","event_time_end":"2012-01-10T11:00:00-05:00","event_time_end_last":"2012-01-10T11:00:00-05:00","gmt_time_start":"2012-01-10 15:00:00","gmt_time_end":"2012-01-10 16:00:00","gmt_time_end_last":"2012-01-10 16:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1242","name":"School of Industrial and Systems Engineering (ISYE)"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003EJohn Bartholdi\u003C\/p\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}