{"version":"1.0","provider_name":"Istituto Grothendieck","provider_url":"https:\/\/igrothendieck.org\/fr\/","author_name":"Miranda Martinengo","author_url":"https:\/\/igrothendieck.org\/fr\/author\/miranda\/","title":"La Poste rend hommage \u00e0 Alexander Grothendieck - Istituto Grothendieck","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"C5Hhh8JBQH\"><a href=\"https:\/\/igrothendieck.org\/fr\/la-poste-rend-hommage-a-alexander-grothendieck\/\">La Poste rend hommage \u00e0 Alexander Grothendieck<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/igrothendieck.org\/fr\/la-poste-rend-hommage-a-alexander-grothendieck\/embed\/#?secret=C5Hhh8JBQH\" width=\"600\" height=\"338\" title=\"\u00ab\u00a0La Poste rend hommage \u00e0 Alexander Grothendieck\u00a0\u00bb &#8212; Istituto Grothendieck\" data-secret=\"C5Hhh8JBQH\" 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\/\/# sourceURL=https:\/\/igrothendieck.org\/wp-includes\/js\/wp-embed.min.js\n<\/script>\n","thumbnail_url":"https:\/\/igrothendieck.org\/wp-content\/uploads\/2025\/06\/20250620_TimbreLaPoste_Grothendieck.webp","thumbnail_width":441,"thumbnail_height":600,"description":"Le 16 juin 2025, La Poste a rendu hommage \u00e0 Alexander Grothendieck en \u00e9mettant un timbre postal.Le professeur Caramello, pr\u00e9sident de l'Institut, a eu l'honneur de contribuer \u00e0 la cr\u00e9ation de ce timbre. Elle a notamment particip\u00e9 au choix de la formule math\u00e9matique qui figure sur le timbre.Celle-ci repr\u00e9sente l'un des principes fondamentaux des travaux de Grothendieck, la m\u00e9thode de la relativit\u00e9 (qui consiste \u00e0 remplacer l'\u00e9tude des objets par celle des morphismes entre eux), qu'il a introduite dans ses nouveaux fondements de la g\u00e9om\u00e9trie alg\u00e9brique.Grothendieck avait pour habitude de commencer ses s\u00e9minaires en \u00e9crivant cette expression au tableau."}