{"id":3247,"date":"2013-04-24T06:02:39","date_gmt":"2013-04-24T06:02:39","guid":{"rendered":"https:\/\/www.glc.us.es\/~jalonso\/vestigium\/?p=3247"},"modified":"2013-04-24T06:03:11","modified_gmt":"2013-04-24T06:03:11","slug":"resena-a-formal-proof-of-kruskals-tree-theorem-in-isabellehol","status":"publish","type":"post","link":"https:\/\/www.glc.us.es\/~jalonso\/vestigium\/resena-a-formal-proof-of-kruskals-tree-theorem-in-isabellehol\/","title":{"rendered":"Rese\u00f1a: A formal proof of Kruskal&#8217;s tree theorem in Isabelle\/HOL"},"content":{"rendered":"<p>Se ha publicado un art\u00edculo de razonamiento formalizado en <a href=\"http:\/\/www.cl.cam.ac.uk\/research\/hvg\/Isabelle\/index.html\">Isabelle\/HOL<\/a> titulado <a href=\"http:\/\/www.jaist.ac.jp\/~c-sterna\/publications\/S-Draft-2013.pdf\">A formal proof of Kruskal&#8217;s tree theorem in Isabelle\/HOL<\/a>.<\/p>\n<p>Su autor es <a href=\"http:\/\/www.jaist.ac.jp\/~c-sterna\/\">Christian Sternagel<\/a> (del JAIST, Jap\u00f3n).<\/p>\n<p>Su resumen es<\/p>\n<blockquote><p>\nWe give the first formalization of Kruskal\u2019s tree theorem in a proof assistant \u2013 the closure of a long-standing challenge. More concretely, we present our Isabelle\/HOL development of Nash-Williams\u2019 minimal bad sequence argument for proving the tree theorem. Along the way, we discuss proofs of Dickson\u2019s lemma and Higman\u2019s lemma; and close all gaps in the original proofs.\n<\/p><\/blockquote>\n<p>El c\u00f3digo con las correspondiente teor\u00edas en Isabelle\/HOL se encuentra <a href=\"http:\/\/afp.sourceforge.net\/devel-entries\/Well_Quasi_Orders.shtml\">aqu\u00ed<\/a>. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>Se ha publicado un art\u00edculo de razonamiento formalizado en Isabelle\/HOL titulado A formal proof of Kruskal&#8217;s tree theorem in Isabelle\/HOL. Su autor es Christian Sternagel (del JAIST, Jap\u00f3n). Su resumen es We give the first formalization of Kruskal\u2019s tree theorem in a proof assistant \u2013 the closure of a long-standing challenge. More concretely, we present&#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"footnotes":"","_jetpack_memberships_contains_paid_content":false},"categories":[1],"tags":[144,285],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_likes_enabled":false,"_links":{"self":[{"href":"https:\/\/www.glc.us.es\/~jalonso\/vestigium\/wp-json\/wp\/v2\/posts\/3247"}],"collection":[{"href":"https:\/\/www.glc.us.es\/~jalonso\/vestigium\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.glc.us.es\/~jalonso\/vestigium\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.glc.us.es\/~jalonso\/vestigium\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.glc.us.es\/~jalonso\/vestigium\/wp-json\/wp\/v2\/comments?post=3247"}],"version-history":[{"count":2,"href":"https:\/\/www.glc.us.es\/~jalonso\/vestigium\/wp-json\/wp\/v2\/posts\/3247\/revisions"}],"predecessor-version":[{"id":3249,"href":"https:\/\/www.glc.us.es\/~jalonso\/vestigium\/wp-json\/wp\/v2\/posts\/3247\/revisions\/3249"}],"wp:attachment":[{"href":"https:\/\/www.glc.us.es\/~jalonso\/vestigium\/wp-json\/wp\/v2\/media?parent=3247"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.glc.us.es\/~jalonso\/vestigium\/wp-json\/wp\/v2\/categories?post=3247"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.glc.us.es\/~jalonso\/vestigium\/wp-json\/wp\/v2\/tags?post=3247"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}