{"version":"1.0","provider_name":"\u00c9tienne Ghys","provider_url":"https:\/\/perso.ens-lyon.fr\/ghys","author_name":"ghys","author_url":"https:\/\/perso.ens-lyon.fr\/ghys\/author\/ghys\/","title":"Le th\u00e9or\u00e8me de l'indice, au sommet - \u00c9tienne Ghys","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"zkspA5swHg\"><a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/2021\/03\/21\/le-theoreme-de-lindice-au-sommet\/\">Le th\u00e9or\u00e8me de l&rsquo;indice, au sommet<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/perso.ens-lyon.fr\/ghys\/2021\/03\/21\/le-theoreme-de-lindice-au-sommet\/embed\/#?secret=zkspA5swHg\" width=\"600\" height=\"338\" title=\"\u00ab\u00a0Le th\u00e9or\u00e8me de l&rsquo;indice, au sommet\u00a0\u00bb &#8212; \u00c9tienne Ghys\" data-secret=\"zkspA5swHg\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n<\/script>\n","description":"Le math\u00e9maticien am\u00e9ricain Isadore Singer est d\u00e9c\u00e9d\u00e9 le 11 f\u00e9vrier, \u00e0 l\u2019\u00e2ge de 96 ans. Avec son collaborateur Michael Atiyah, mort en 2019, il avait d\u00e9montr\u00e9 le th\u00e9or\u00e8me de l\u2019indice, c\u00e9l\u00e8bre parmi les math\u00e9maticiens, qui leur a valu le prix Abel en 2004. L\u2019importance exceptionnelle de ce th\u00e9or\u00e8me est attest\u00e9e par le fait qu\u2019il \u00e9tablit &hellip; Continuer la lecture de &rarr;"}