{"id":429,"date":"2016-01-21T16:11:13","date_gmt":"2016-01-21T15:11:13","guid":{"rendered":"http:\/\/perso.ens-lyon.fr\/ghys\/?page_id=429"},"modified":"2020-03-31T17:55:20","modified_gmt":"2020-03-31T16:55:20","slug":"surveys-2","status":"publish","type":"page","link":"https:\/\/perso.ens-lyon.fr\/ghys\/surveys-2\/","title":{"rendered":"Surveys"},"content":{"rendered":"<p><a href=\"https:\/\/scholar.google.com\/citations?view_op=list_works&amp;hl=en&amp;user=3zEVRpYAAAAJ&amp;gmla=AJsN-F79r8hulM9Mhhsh4ep5lA1U2b3BF9JD5OeW51aA5hXPtmzcAj4JJMihsWXl1SCeu4DLb2NyPTNTbSyvNTYxG7axU1xDZvaZn9iShD2-jwTzdajSfyty0VpfSkouOUDQKWQbgY0l\" class=\"broken_link\">Google Scholar<\/a><\/p>\n<ul>\n<li>L&rsquo;invariant de Godbillon-Vey. S\u00e9minaire Bourbaki, Vol. 1988\/89. Ast\u00e9risque No. 177-178 (1989), Exp. No. 706, 155-181.<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/reviews\/invariantgodbillonvey-rev.pdf\"><br \/>\nAbstract MR<\/a>\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/articles\/invariantgodbillonvey.pdf\">Article pdf<\/a><\/li>\n<li>Les groupes hyperboliques. S\u00e9minaire Bourbaki, Vol. 1989\/90. Ast\u00e9risque No. 189-190 (1990), Exp. No. 722, 203-238.<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/reviews\/groupeshyperboliquesbourbaki-rev.pdf\"><br \/>\nAbstract MR<\/a>\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/articles\/groupeshyperboliquesbourbaki.pdf\">Article.pdf<\/a><\/li>\n<li>Infinite groups as geometric objects (after Gromov), avec P. de la Harpe. Ergodic theory, symbolic dynamics, and hyperbolic spaces (Trieste, 1989), 299-314, Oxford Sci. Publ., Oxford Univ. Press, New York, 1991.\u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/reviews\/infinitegroups-rev.pdf\"><br \/>\nAbstract MR<\/a>\u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/articles\/infinitegroups.pdf\">Article.pdf<\/a><\/li>\n<li>Dynamique des flots unipotents sur les espaces homog\u00e8nes. S\u00e9minaire Bourbaki, Vol. 1991\/92. Ast\u00e9risque No. 206 (1992), Exp. No. 747, 3, 93-136.<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/reviews\/dynamiqueflots-rev.pdf\"><br \/>\nAbstract MR<\/a>\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/articles\/dynamiqueflots.pdf\">Article.pdf<\/a><\/li>\n<li>Construction de champs de vecteurs sans orbite p\u00e9riodique (d&rsquo;apr\u00e8s Krystyna Kuperberg).\u00a0 S\u00e9minaire Bourbaki, Vol. 1993\/94. Ast\u00e9risque No. 227 (1995), Exp. No. 785, 5, 283-307.\u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/reviews\/constructionschamps-rev.pdf\"><br \/>\nAbstract MR<\/a>\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/articles\/constructionchamps.pdf\">Article.pdf<\/a><\/li>\n<li>Les syst\u00e8mes dynamiques holomorphes. Dynamique et g\u00e9om\u00e9trie complexes (Lyon, 1997), 1-10, Panor. Synth\u00e8ses, 8, Soc. Math. France, Paris, 1999.\u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/reviews\/systemesdynamiques-rev.pdf\"><br \/>\nAbstract MR<\/a>\u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0 \u00a0\u00a0 \u00a0 \u00a0\u00a0 \u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/articles\/systemesdynamiques.pdf\">\u00a0Article.pdf<\/a><\/li>\n<li>Laminations par surfaces de Riemann.\u00a0 Dynamique et g\u00e9om\u00e9trie complexes (Lyon, 1997), ix, xi, 49-95, Panor. Synth\u00e8ses, 8, Soc. Math. France, Paris, 1999.<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/reviews\/laminationssurfaces.pdf\"><br \/>\nAbstract MR<\/a>\u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/articles\/laminationssurfaces.pdf\">\u00a0\u00a0 Article pdf<\/a><\/li>\n<li>Groups acting on the circle. Enseign. Math. (2) 47 (2001), no. 3-4, 329-407.<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/reviews\/groupsacting-rev.pdf\"><br \/>\nAbstract MR<\/a>\u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/articles\/groupscircle.pdf\">Article pdf<\/a><\/li>\n<li>R\u00e9sonances et petits diviseurs, Colloque \u00ab\u00a0Fourier\u00a0\u00bb, Auxerre 2002, publi\u00e9 dans la deuxi\u00e8me \u00e9dition de \u00ab\u00a0L&rsquo;h\u00e9ritage de Kolmogorov\u00a0\u00bb, Belin. Traduction anglaise dans \u00ab\u00a0Kolmogorov\u2019s heritage in mathematics\u00a0\u00bb, 187\u2013213, Springer, Berlin, 2007.\u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/reviews\/resonancessmall-rev.pdf\"><br \/>\nAbstract MR<\/a>\u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/articles\/resonancesdiviseurs.pdf\">Article pdf<\/a>\u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/articles\/resonancesmall.pdf\">En anglais.pdf<\/a><\/li>\n<li>Groupes al\u00e9atoires (d&rsquo;apr\u00e8s Misha Gromov, &#8230;). Ast\u00e9risque No. 294 (2004), viii, 173-204.\u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/reviews\/groupesaleatoires-rev.pdf\"><br \/>\nAbstract MR<\/a>\u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/articles\/groupesaleatoires.pdf\">Article pdf<\/a><\/li>\n<li>Poincar\u00e9 et son disque, dans\u00a0<a href=\"https:\/\/www.belin-education.com\/lheritage-scientifique-de-poincare\" class=\"broken_link\">L&rsquo;h\u00e9ritage scientifique de Poincar\u00e9<\/a><br \/>\nAbstract MR\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/articles\/disque-poincare.pdf\">Article.pdf<\/a><\/li>\n<li>Six le\u00e7ons sur les surfaces de Riemann, avec D. Smai, Travaux en cours (2008).<br \/>\nAbstract MR\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/articles\/Sixlecons.pdf\">Article.pdf<\/a><\/li>\n<li>G\u00e9od\u00e9siques sur les surfaces \u00e0 courbure n\u00e9gative,\u00a0<a href=\"http:\/\/www.amazon.fr\/Le%E7ons-math%E9matiques-daujourdhui-Volume-4\/dp\/2842251148\" class=\"broken_link\">Le\u00e7ons de math\u00e9matiques d&rsquo;aujourd&rsquo;hui<\/a>, volume 4, pr\u00e9sent\u00e9 par Fr\u00e9d\u00e9ric Bayart et Eric Charpentier, Belin (2009)<br \/>\nAbstract MR\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/articles\/geodesiquessurfaces.pdf\">Article.pdf<\/a><\/li>\n<li>L&rsquo;attracteur de Lorenz, paradigme du chaos,\u00a0<a href=\"http:\/\/www.bourbaphy.fr\/juin2010.html\" class=\"broken_link\">s\u00e9minaire Poincar\u00e9<\/a>, juin 2010. English translation :\u00a0<span class=\"title\">The Lorenz attractor, a paradigm for chaos.<\/span> <em>Chaos, <\/em>1\u201354, <a href=\"https:\/\/mathscinet-ams-org.acces.bibliotheque-diderot.fr\/mathscinet\/search\/series.html?id=4496\" class=\"broken_link\">Prog. Math. Phys., 66,<\/a> <em>Birkh\u00e4user\/Springer, Basel,<\/em> 2013.<br \/>\nAbstract MR\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/articles\/lorenzparadigme.pdf\">Article.pdf<\/a><\/li>\n<li>The butterfly effect, Actes du \u00ab\u00a012th International Congress on Mathematical Education\u00a0\u00bb 2012.<br \/>\nAbstract MR\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/articles\/butterflyeffect.pdf\">Article.pdf<\/a><\/li>\n<li><span class=\"title\">The dynamics of vector fields in dimension 3.<\/span> <a href=\"https:\/\/mathscinet-ams-org.acces.bibliotheque-diderot.fr\/mathscinet\/search\/series.html?id=4844\" class=\"broken_link\">Ramanujan Mathematical Society Lecture Notes Series, 22.<\/a> <em>Ramanujan Mathematical Society, Mysore,<\/em> 2015. vii + 45 pp. Notes by Matthias Moreno and Siddhartha Bhattacharya.<br \/>\nAbstract MR\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/articles\/dynamicsvector.pdf\">Article.pdf<\/a><\/li>\n<li><span class=\"title\">Signatures in algebra, topology and dynamics, with Andrew Ranicki, <\/span><em>Six papers on signatures, braids and Seifert surfaces, <\/em>1\u2013173, <a href=\"https:\/\/mathscinet-ams-org.acces.bibliotheque-diderot.fr\/mathscinet\/search\/series.html?id=4801\" class=\"broken_link\">Ensaios Mat., 30,<\/a> <em>Soc. Brasil. Mat., Rio de Janeiro,<\/em> 2016.<br \/>\nAbstract MR \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/articles\/signaturesalgtopdyn.pdf\">Article.pdf<\/a><\/li>\n<li><span class=\"title\">Inner simplicity vs. outer simplicity.<\/span> <em>Simplicity: ideals of practice in mathematics and the arts, <\/em>3\u201314, <a href=\"https:\/\/mathscinet-ams-org.acces.bibliotheque-diderot.fr\/mathscinet\/search\/series.html?id=5892\" class=\"broken_link\">Math. Cult. Arts,<\/a> <em>Springer, Cham,<\/em> 2017.\u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/reviews\/simple.pdf\"><br \/>\nReview.pdf<\/a>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0<a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/articles\/Simplicity.pdf\">Article.pdf<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Google Scholar L&rsquo;invariant de Godbillon-Vey. S\u00e9minaire Bourbaki, Vol. 1988\/89. Ast\u00e9risque No. 177-178 (1989), Exp. No. 706, 155-181. Abstract MR\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0Article pdf Les groupes hyperboliques. S\u00e9minaire Bourbaki, Vol. 1989\/90. Ast\u00e9risque No. 189-190 (1990), Exp. No. 722, 203-238. Abstract MR\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0Article.pdf Infinite groups as geometric objects (after Gromov), avec P. de &hellip; <a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/surveys-2\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Surveys<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","ub_ctt_via":"","_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"episode_type":"","audio_file":"","cover_image":"","cover_image_id":"","duration":"","filesize":"","date_recorded":"","explicit":"","block":"","itunes_episode_number":"","itunes_title":"","itunes_season_number":"","itunes_episode_type":"","filesize_raw":"","footnotes":""},"class_list":["post-429","page","type-page","status-publish","hentry"],"featured_image_src":null,"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Surveys - \u00c9tienne Ghys<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/perso.ens-lyon.fr\/ghys\/surveys-2\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Surveys - \u00c9tienne Ghys\" \/>\n<meta property=\"og:description\" content=\"Google Scholar L&rsquo;invariant de Godbillon-Vey. S\u00e9minaire Bourbaki, Vol. 1988\/89. Ast\u00e9risque No. 177-178 (1989), Exp. No. 706, 155-181. Abstract MR\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0Article pdf Les groupes hyperboliques. S\u00e9minaire Bourbaki, Vol. 1989\/90. Ast\u00e9risque No. 189-190 (1990), Exp. No. 722, 203-238. Abstract MR\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0Article.pdf Infinite groups as geometric objects (after Gromov), avec P. de &hellip; Continuer la lecture de Surveys &rarr;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/perso.ens-lyon.fr\/ghys\/surveys-2\/\" \/>\n<meta property=\"og:site_name\" content=\"\u00c9tienne Ghys\" \/>\n<meta property=\"article:modified_time\" content=\"2020-03-31T16:55:20+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/perso.ens-lyon.fr\/ghys\/surveys-2\/\",\"url\":\"https:\/\/perso.ens-lyon.fr\/ghys\/surveys-2\/\",\"name\":\"Surveys - \u00c9tienne Ghys\",\"isPartOf\":{\"@id\":\"https:\/\/perso.ens-lyon.fr\/ghys\/#website\"},\"datePublished\":\"2016-01-21T15:11:13+00:00\",\"dateModified\":\"2020-03-31T16:55:20+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/perso.ens-lyon.fr\/ghys\/surveys-2\/#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/perso.ens-lyon.fr\/ghys\/surveys-2\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/perso.ens-lyon.fr\/ghys\/surveys-2\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"https:\/\/perso.ens-lyon.fr\/ghys\/accueil\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Surveys\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/perso.ens-lyon.fr\/ghys\/#website\",\"url\":\"https:\/\/perso.ens-lyon.fr\/ghys\/\",\"name\":\"\u00c9tienne Ghys\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/perso.ens-lyon.fr\/ghys\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Surveys - \u00c9tienne Ghys","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/perso.ens-lyon.fr\/ghys\/surveys-2\/","og_locale":"fr_FR","og_type":"article","og_title":"Surveys - \u00c9tienne Ghys","og_description":"Google Scholar L&rsquo;invariant de Godbillon-Vey. S\u00e9minaire Bourbaki, Vol. 1988\/89. Ast\u00e9risque No. 177-178 (1989), Exp. No. 706, 155-181. Abstract MR\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0Article pdf Les groupes hyperboliques. S\u00e9minaire Bourbaki, Vol. 1989\/90. Ast\u00e9risque No. 189-190 (1990), Exp. No. 722, 203-238. Abstract MR\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0Article.pdf Infinite groups as geometric objects (after Gromov), avec P. de &hellip; Continuer la lecture de Surveys &rarr;","og_url":"https:\/\/perso.ens-lyon.fr\/ghys\/surveys-2\/","og_site_name":"\u00c9tienne Ghys","article_modified_time":"2020-03-31T16:55:20+00:00","twitter_card":"summary_large_image","twitter_misc":{"Dur\u00e9e de lecture estim\u00e9e":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/perso.ens-lyon.fr\/ghys\/surveys-2\/","url":"https:\/\/perso.ens-lyon.fr\/ghys\/surveys-2\/","name":"Surveys - \u00c9tienne Ghys","isPartOf":{"@id":"https:\/\/perso.ens-lyon.fr\/ghys\/#website"},"datePublished":"2016-01-21T15:11:13+00:00","dateModified":"2020-03-31T16:55:20+00:00","breadcrumb":{"@id":"https:\/\/perso.ens-lyon.fr\/ghys\/surveys-2\/#breadcrumb"},"inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/perso.ens-lyon.fr\/ghys\/surveys-2\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/perso.ens-lyon.fr\/ghys\/surveys-2\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Accueil","item":"https:\/\/perso.ens-lyon.fr\/ghys\/accueil\/"},{"@type":"ListItem","position":2,"name":"Surveys"}]},{"@type":"WebSite","@id":"https:\/\/perso.ens-lyon.fr\/ghys\/#website","url":"https:\/\/perso.ens-lyon.fr\/ghys\/","name":"\u00c9tienne Ghys","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/perso.ens-lyon.fr\/ghys\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"fr-FR"}]}},"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"post-thumbnail":false},"uagb_author_info":{"display_name":"ghys","author_link":"https:\/\/perso.ens-lyon.fr\/ghys\/author\/ghys\/"},"uagb_comment_info":0,"uagb_excerpt":"Google Scholar L&rsquo;invariant de Godbillon-Vey. S\u00e9minaire Bourbaki, Vol. 1988\/89. Ast\u00e9risque No. 177-178 (1989), Exp. No. 706, 155-181. Abstract MR\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0Article pdf Les groupes hyperboliques. S\u00e9minaire Bourbaki, Vol. 1989\/90. Ast\u00e9risque No. 189-190 (1990), Exp. No. 722, 203-238. Abstract MR\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0Article.pdf Infinite groups as geometric objects (after Gromov), avec P. de\u2026","_links":{"self":[{"href":"https:\/\/perso.ens-lyon.fr\/ghys\/wp-json\/wp\/v2\/pages\/429","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/perso.ens-lyon.fr\/ghys\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/perso.ens-lyon.fr\/ghys\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/perso.ens-lyon.fr\/ghys\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/perso.ens-lyon.fr\/ghys\/wp-json\/wp\/v2\/comments?post=429"}],"version-history":[{"count":15,"href":"https:\/\/perso.ens-lyon.fr\/ghys\/wp-json\/wp\/v2\/pages\/429\/revisions"}],"predecessor-version":[{"id":1372,"href":"https:\/\/perso.ens-lyon.fr\/ghys\/wp-json\/wp\/v2\/pages\/429\/revisions\/1372"}],"wp:attachment":[{"href":"https:\/\/perso.ens-lyon.fr\/ghys\/wp-json\/wp\/v2\/media?parent=429"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}