{"id":16086,"date":"2020-08-07T09:35:37","date_gmt":"2020-08-07T09:35:37","guid":{"rendered":"https:\/\/elpais.com\/ciencia\/2020-08-07\/smullyan-el-infinito-y-algo-mas.html"},"modified":"2020-08-13T07:37:15","modified_gmt":"2020-08-13T07:37:15","slug":"smullyan-el-infinito-y-algo-mas","status":"publish","type":"post","link":"http:\/\/forocilac.org\/en\/smullyan-el-infinito-y-algo-mas\/","title":{"rendered":"Smullyan, infinity and something more"},"content":{"rendered":"<p>The question, raised a couple of weeks ago, of proving that the set of all finite sets of N (N being the set of natural numbers, that is, integers and positive) is countable, remained pending. The clearest and simplest proof can be found in the excellent book by <a href=\"https:\/\/elpais.com\/elpais\/2016\/07\/01\/ciencia\/1467365714_362171.html\" >Raymond Smullyan<\/a> <i>Satan, Singer and the Infinite<\/i> (which is not the first time I cite in this section nor will it be the last):<\/p>\n<p><a href=\"https:\/\/elpais.com\/ciencia\/2020-08-07\/smullyan-el-infinito-y-algo-mas.html\" >Keep reading<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>En su libro &lsquo;Sat&aacute;n, Cantor y el infinito&#8217;, el matem&aacute;tico nos ofrece una fascinante retah&iacute;la de preguntas desconcertantes y respuestas sorprendentes<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[123],"tags":[],"class_list":{"0":"post-16086","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-portal"},"aioseo_notices":[],"_links":{"self":[{"href":"http:\/\/forocilac.org\/en\/wp-json\/wp\/v2\/posts\/16086","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/forocilac.org\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/forocilac.org\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/forocilac.org\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/forocilac.org\/en\/wp-json\/wp\/v2\/comments?post=16086"}],"version-history":[{"count":2,"href":"http:\/\/forocilac.org\/en\/wp-json\/wp\/v2\/posts\/16086\/revisions"}],"predecessor-version":[{"id":16520,"href":"http:\/\/forocilac.org\/en\/wp-json\/wp\/v2\/posts\/16086\/revisions\/16520"}],"wp:attachment":[{"href":"http:\/\/forocilac.org\/en\/wp-json\/wp\/v2\/media?parent=16086"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/forocilac.org\/en\/wp-json\/wp\/v2\/categories?post=16086"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/forocilac.org\/en\/wp-json\/wp\/v2\/tags?post=16086"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}