<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>First-Principles on Fernando Hermida</title><link>https://www.fernandohermida.com/tags/first-principles/</link><description>Recent content in First-Principles on Fernando Hermida</description><generator>Hugo</generator><language>en-us</language><lastBuildDate>Fri, 11 Sep 2026 00:00:00 +0000</lastBuildDate><atom:link href="https://www.fernandohermida.com/tags/first-principles/index.xml" rel="self" type="application/rss+xml"/><item><title>Music Theory for Software Developers</title><link>https://www.fernandohermida.com/posts/music-theory-for-software-developers/</link><pubDate>Fri, 11 Sep 2026 00:00:00 +0000</pubDate><guid>https://www.fernandohermida.com/posts/music-theory-for-software-developers/</guid><description>I derived the twelve-note system in TypeScript to find out why it exists. Then I read the rest of the syllabus and found canonical forms, permutation groups and an assignment problem.</description></item></channel></rss>