<?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>Tue, 21 Apr 2026 16:44:12 GMT</lastBuildDate><atom:link href="http://direct.ecency.com/created/crossproduct/rss.xml" rel="self" type="application/rss+xml"/><item><title><![CDATA[Curvature Cross Product Formula: Proof and Example on Twisted Cubic]]></title><description><![CDATA[In this video, I derive a more convenient formula for the curvature of a space curve, which involves the cross product of the first two derivatives of the vector function. I derive this using the fact]]></description><link>http://direct.ecency.com/hive-128780/@mes/rbhcjajw</link><guid isPermaLink="true">http://direct.ecency.com/hive-128780/@mes/rbhcjajw</guid><category><![CDATA[hive-128780]]></category><dc:creator><![CDATA[mes]]></dc:creator><pubDate>Tue, 06 Jan 2026 05:25:06 GMT</pubDate><enclosure url="https://images.ecency.com/p/99pyU5Ga1kwr5bsMXthzYLbcngN4W2P8NtU9TWTdHC3HaQbjuuRfKKVdjVbFu4pKvsFcKD4v25HESWjZCrWXZ35JUmBtMWiHxti7m6MEvJ3fiH8ixcHy5uUzJcWvTmk9Rg?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[The Length of a Cross Product: Proof]]></title><description><![CDATA[In this video I go over the theorem for the length of a cross product as well as provide the proof for it. The length of a cross product is given by |a x b| = |a| |b| sin θ. I prove this by first applying]]></description><link>http://direct.ecency.com/hive-128780/@mes/mnbqlhir</link><guid isPermaLink="true">http://direct.ecency.com/hive-128780/@mes/mnbqlhir</guid><category><![CDATA[hive-128780]]></category><dc:creator><![CDATA[mes]]></dc:creator><pubDate>Tue, 14 Feb 2023 18:31:06 GMT</pubDate><enclosure url="https://images.ecency.com/p/99pyU5Ga1kwr5bsMXthzYLbcngN4W2P8NtU9TWTdHC3HaQbjuuRfHesJoVwWgJGJYjextvjQCBggGBTkM8vx6TQPzJF56YeKw4bETKmy55HKYXPfGvovLAJrLBY2a2gcD4?format=match&amp;mode=fit" length="0" type="false"/></item></channel></rss>