<?xml version="1.0" encoding="UTF-8"?><rss xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:atom="http://www.w3.org/2005/Atom" version="2.0"><channel><title><![CDATA[RSS Feed]]></title><description><![CDATA[RSS Feed]]></description><link>http://direct.ecency.com</link><image><url>http://direct.ecency.com/logo512.png</url><title>RSS Feed</title><link>http://direct.ecency.com</link></image><generator>RSS for Node</generator><lastBuildDate>Thu, 30 Apr 2026 09:39:58 GMT</lastBuildDate><atom:link href="http://direct.ecency.com/created/recreational-mathematics/rss.xml" rel="self" type="application/rss+xml"/><item><title><![CDATA[How many "incomplete open hypercubes" are there in four dimensions?]]></title><description><![CDATA[Sol LeWitt's artwork "Incomplete Open Cubes" enumerates all distinct connected sets of edges of the cube which do not collapse into a smaller dimension (a figure that lies in the plane, or a]]></description><link>http://direct.ecency.com/stemq/@markgritter/how-many-incomplete-open-hypercubes-are-there-in-four-dimensions</link><guid isPermaLink="true">http://direct.ecency.com/stemq/@markgritter/how-many-incomplete-open-hypercubes-are-there-in-four-dimensions</guid><category><![CDATA[stemq]]></category><dc:creator><![CDATA[markgritter]]></dc:creator><pubDate>Fri, 02 Nov 2018 16:45:03 GMT</pubDate><enclosure url="https://images.ecency.com/p/3jpR3paJ37V8JxyWvtbhvcm5k3roJwHBR4WTALx7XaoRovbggwB82cDnZ7Pus1fthai13L8U2GV53picxMppP9A9i1VJtKiJK3drDYihXFPWdUgQEn6w5pr5oy3eRKtWBRZMY?format=match&amp;mode=fit" length="0" type="false"/></item></channel></rss>