{"id":659,"date":"2026-09-16T14:19:07","date_gmt":"2026-09-16T13:19:07","guid":{"rendered":"https:\/\/lig-membres.imag.fr\/denisb\/?p=659"},"modified":"2026-09-16T14:19:07","modified_gmt":"2026-09-16T13:19:07","slug":"lean-lang","status":"publish","type":"post","link":"https:\/\/lig-membres.imag.fr\/denisb\/lean-lang\/","title":{"rendered":"Lean-lang !"},"content":{"rendered":"<p>[mon avis] Lean-lang (<a href=\"https:\/\/fr.wikipedia.org\/wiki\/Lean_(assistant_de_preuve)\">lean4<\/a>) vaut le d\u00e9tour, c&#8217;est un langage de programmation sympa (fluide, concis, \u00e9l\u00e9gant, puissant, etc.), mais surtout, c&#8217;est un environnement qui permet de prouver ses programmes.<\/p>\n<p>Je ne dirais pas qu&#8217;il est simple (en particulier pour les preuves), mais c&#8217;est tr\u00e8s encourageant pour l&#8217;avenir.<\/p>\n<p>S&#8217;il me semble d\u00e9licat de l&#8217;utiliser avec des \u00e9tudiants juste pour quelques s\u00e9ances (je crains qu&#8217;il ne faille lui consacrer plus de temps), on peut au moins le leur montrer.<\/p>\n<p>Pour se faire une id\u00e9e, j&#8217;ai fait quelques vid\u00e9os :<\/p>\n<ul>\n<li><a href=\"https:\/\/www.youtube.com\/watch?v=o-4wMoIFIjU\">int\u00e9gration de lean dans Jupyter<\/a> (on peut donc, raconter, programmer, ex\u00e9cuter, tester et prouver en jupyter)<\/li>\n<li><a href=\"https:\/\/www.youtube.com\/watch?v=FlNHJzClyB8\">premiers programmes<\/a> et <a href=\"https:\/\/www.youtube.com\/watch?v=isdOxkU8NxI\">programmes suivants<\/a> (quand les probl\u00e8mes arrivent)<\/li>\n<li><a href=\"https:\/\/www.youtube.com\/watch?v=1r8S_qdLBDI\">premi\u00e8res preuves<\/a><\/li>\n<\/ul>\n<p>J&#8217;esp\u00e8re que Lean va progresser encore et devenir vraiment facile \u00e0 utiliser pour tout le monde (novice et expert) et sur tous les sujets (programmation et preuve).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[mon avis] Lean-lang (lean4) vaut le d\u00e9tour, c&#8217;est un langage de programmation sympa (fluide, concis, \u00e9l\u00e9gant, puissant, etc.), mais surtout, [&hellip;]<\/p>\n","protected":false},"author":42,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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