Resumo: We analyze the network of transactions among cities based on the electronic invoice database for the municipalities in the Cear\u00e1 state, Brazil. It consists of approximately 3.7 billion records, registered during the period between the years 2016 to 2019. We use modularity algorithms to detect the partition which provides the shortest description length and captures the optimal community structure of the network in terms of its associated flow dynamics. From the inter-City network of traded products, we also build bipartite structures considering both selling and buying activities and use the revealed comparative advantage (RCA) concept to define a non-monetary and binary activity index that can distinguish the RCA of a city in a class of goods or services as evidenced by trade flows. Finally, through the pairwise Maximum Entropy Model, we can associate to the largest communities their corresponding binary Ising-like Hamiltonian models. In an analogy with critical phenomena, our results reveal that each community operates at a \u201ctemperature\u201d that is close to the corresponding \u201ccritical point\u201d, suggesting a high degree of \u201ceconomic cohesiveness\u201d in its trade network of cities.<\/p>\n\n\n\n O Centro Internacional de F\u00edsica (CIF) da Universidade de Bras\u00edlia (UnB) realizar\u00e1 no dia 4 de julho (sexta-feira), \u00e0s 16:15, o Col\u00f3quio intitulado “From Correlations to ‘Interactions’: Application of a Maximum Entropy Model to Finance” apresentado pelo Prof. Jos\u00e9 Soares de Andrade Jr. (DF – UFC). O evento ocorrer\u00e1 no Audit\u00f3rio do CIF da Universidade de Bras\u00edlia, […]<\/p>\n","protected":false},"author":4,"featured_media":16567,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[461],"tags":[],"class_list":["post-27791","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-eventos"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.sbfisica.org.br\/v1\/sbf\/wp-json\/wp\/v2\/posts\/27791","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sbfisica.org.br\/v1\/sbf\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sbfisica.org.br\/v1\/sbf\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sbfisica.org.br\/v1\/sbf\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sbfisica.org.br\/v1\/sbf\/wp-json\/wp\/v2\/comments?post=27791"}],"version-history":[{"count":1,"href":"https:\/\/www.sbfisica.org.br\/v1\/sbf\/wp-json\/wp\/v2\/posts\/27791\/revisions"}],"predecessor-version":[{"id":27793,"href":"https:\/\/www.sbfisica.org.br\/v1\/sbf\/wp-json\/wp\/v2\/posts\/27791\/revisions\/27793"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.sbfisica.org.br\/v1\/sbf\/wp-json\/wp\/v2\/media\/16567"}],"wp:attachment":[{"href":"https:\/\/www.sbfisica.org.br\/v1\/sbf\/wp-json\/wp\/v2\/media?parent=27791"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sbfisica.org.br\/v1\/sbf\/wp-json\/wp\/v2\/categories?post=27791"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sbfisica.org.br\/v1\/sbf\/wp-json\/wp\/v2\/tags?post=27791"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"\"](\"https:\/\/www.sbfisica.org.br\/v1\/sbf\/wp-content\/uploads\/2025\/07\/Coloquio-Soares-1024x1024.png\")
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