<?xml version="1.0" encoding="UTF-8"?><rss version="2.0"><channel><title>David&apos;s blog</title><description>Programming languages, math, ...</description><link>https://roboguy13.github.io/</link><item><title>String diagrams and the monad laws</title><link>https://roboguy13.github.io/blog/string-diagrams-and-monads/</link><guid isPermaLink="true">https://roboguy13.github.io/blog/string-diagrams-and-monads/</guid><description>A look at string diagrams, and how to use them to understand the monad laws.</description><pubDate>Sat, 17 Oct 2026 00:00:00 GMT</pubDate></item></channel></rss>