{"id":1558,"date":"2020-04-15T10:34:05","date_gmt":"2020-04-15T14:34:05","guid":{"rendered":"http:\/\/josmfs.net\/?p=1558"},"modified":"2020-04-15T10:34:05","modified_gmt":"2020-04-15T14:34:05","slug":"red-star-%d0%ba%d1%80%d0%b0%d1%81%d0%bd%d0%b0%d1%8f-%d0%b7%d0%b2%d0%b5%d0%b7%d0%b4%d0%b0","status":"publish","type":"post","link":"https:\/\/josmfs.net\/wordpress\/2020\/04\/15\/red-star-%d0%ba%d1%80%d0%b0%d1%81%d0%bd%d0%b0%d1%8f-%d0%b7%d0%b2%d0%b5%d0%b7%d0%b4%d0%b0\/","title":{"rendered":"Red Star (\u041a\u0440\u0430\u0441\u043d\u0430\u044f \u0417\u0432\u0435\u0437\u0434\u0430)"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-1556\" src=\"https:\/\/josmfs.net\/wordpress\/wp-content\/uploads\/2020\/04\/Red-Star-fig.jpg\" alt=\"\" width=\"251\" height=\"182\" \/>Here is another Brainteaser from the <em>Quantum<\/em> magazine.<\/p>\n<p>\u201cProve that the area of the red portion of the star is exactly half the area of the whole star. (N. Avilov)\u201d<\/p>\n<p>This is a relatively simple problem, but I wanted to include it because of its cartoon. Its implied gentle post-Soviet humor reminded me of that strange decade in US-Russian affairs between the end of the Cold War and the rise of Putin in the 21st century. The strangeness was brought home when we had our annual security checks of our classified document storage. Being mostly anti-submarine warfare (ASW) material the main concern was that it would not fall into the hands of the Soviets. But with the \u201cdemise\u201d of the Soviet Union in 1989 no one cared any more about the classification. After decades of painfully securing these documents we could not suddenly turn them loose and throw them into the public trash. So we kept them secure anyway. You can imagine how we old cold-warriors feel about the current regime.<\/p>\n<p>That is not to say that I didn\u2019t welcome the thaw. Russian literature, both classical and even \u201cSoviet realism\u201d, as well as Russian cinema, is some of the world\u2019s best. And Russian mathematicians have always been superior, and especially adept at communicating with novices. The collaboration of the American mathematicians and <em>Kvant<\/em> contributors in <em>Quantum<\/em> produced excellent results during the thaw. It is unfortunate that it could not survive the rise of Putin and his oligarchs.<\/p>\n<p>See the <a href=\"https:\/\/josmfs.net\/wordpress\/wp-content\/uploads\/2020\/04\/Red-Star-200409.pdf\">Red Star<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Here is another Brainteaser from the Quantum magazine. \u201cProve that the area of the red portion of the star is exactly half the area of the whole star. (N. Avilov)\u201d This is a relatively simple problem, but I wanted to include it because of its cartoon. Its implied gentle post-Soviet humor reminded me of that [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[13,194],"class_list":["post-1558","post","type-post","status-publish","format-standard","hentry","category-puzzles-and-problems","tag-plane-geometry","tag-quantum-magazine"],"_links":{"self":[{"href":"https:\/\/josmfs.net\/wordpress\/wp-json\/wp\/v2\/posts\/1558","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/josmfs.net\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/josmfs.net\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/josmfs.net\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/josmfs.net\/wordpress\/wp-json\/wp\/v2\/comments?post=1558"}],"version-history":[{"count":1,"href":"https:\/\/josmfs.net\/wordpress\/wp-json\/wp\/v2\/posts\/1558\/revisions"}],"predecessor-version":[{"id":1559,"href":"https:\/\/josmfs.net\/wordpress\/wp-json\/wp\/v2\/posts\/1558\/revisions\/1559"}],"wp:attachment":[{"href":"https:\/\/josmfs.net\/wordpress\/wp-json\/wp\/v2\/media?parent=1558"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/josmfs.net\/wordpress\/wp-json\/wp\/v2\/categories?post=1558"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/josmfs.net\/wordpress\/wp-json\/wp\/v2\/tags?post=1558"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}