{"id":77,"date":"2012-05-06T15:28:00","date_gmt":"2012-05-06T09:58:00","guid":{"rendered":"http:\/\/ckraju.net\/blog\/?p=77"},"modified":"2012-05-06T15:28:00","modified_gmt":"2012-05-06T09:58:00","slug":"retarded-gravity","status":"publish","type":"post","link":"https:\/\/ckraju.net\/wordpress_F\/?p=77","title":{"rendered":"Retarded gravity"},"content":{"rendered":"<p>Presented this talk at a <a href=\"http:\/\/sixthschoolunila.com.br\/?pagina=convidados&amp;idioma=en\">school <\/a>at\u00a0Petropolis, Brazil.\u00a0Lorentz covariance requires that gravity be velocity dependent.\u00a0But old physicists\u00a0can&#8217;t get over the 19th c. idea, reiterated by Eddington,\u00a0that introducing velocity dependence in gravity makes the two-body problem unstable! They never studied functional differential equations, and no physics texts yet mentions my <a href=\"http:\/\/arxiv.org\/abs\/quant-ph\/0511235\">first solution of\u00a0functional differential equations<\/a> in a serious physical context.\u00a0Old-time physicists\u00a0confuse the mathematical theory of ordinary differential equations with physics. But young people do better.<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/ckraju.net\/gif\/with-young-scientists-of-Brazil.gif\" alt=\"\" \/><\/p>\n<p>\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Presented this talk at a school at\u00a0Petropolis, Brazil.\u00a0Lorentz covariance requires that gravity be velocity dependent.\u00a0But old physicists\u00a0can&#8217;t get over the 19th c. idea, reiterated by Eddington,\u00a0that introducing velocity dependence in gravity makes the two-body problem unstable! They never studied functional differential equations, and no physics texts yet mentions my first solution of\u00a0functional differential equations in a serious physical context.\u00a0Old-time physicists\u00a0confuse the mathematical theory of ordinary differential equations with physics. But young people do better. \u00a0<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-77","post","type-post","status-publish","format-standard","hentry","category-physics"],"_links":{"self":[{"href":"https:\/\/ckraju.net\/wordpress_F\/index.php?rest_route=\/wp\/v2\/posts\/77","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ckraju.net\/wordpress_F\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ckraju.net\/wordpress_F\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ckraju.net\/wordpress_F\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ckraju.net\/wordpress_F\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=77"}],"version-history":[{"count":0,"href":"https:\/\/ckraju.net\/wordpress_F\/index.php?rest_route=\/wp\/v2\/posts\/77\/revisions"}],"wp:attachment":[{"href":"https:\/\/ckraju.net\/wordpress_F\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=77"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ckraju.net\/wordpress_F\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=77"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ckraju.net\/wordpress_F\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=77"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}