<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:content="http://purl.org/rss/1.0/modules/content/"><channel><title>比安基恒等式 on s-ai-unix's Blog</title><link>https://s-ai-unix.github.io/tags/%E6%AF%94%E5%AE%89%E5%9F%BA%E6%81%92%E7%AD%89%E5%BC%8F/</link><description>Recent content in 比安基恒等式 on s-ai-unix's Blog</description><generator>Hugo -- 0.161.1</generator><language>zh-cn</language><lastBuildDate>Sun, 22 Feb 2026 00:00:00 +0000</lastBuildDate><atom:link href="https://s-ai-unix.github.io/tags/%E6%AF%94%E5%AE%89%E5%9F%BA%E6%81%92%E7%AD%89%E5%BC%8F/index.xml" rel="self" type="application/rss+xml"/><item><title>[八] 比安基恒等式：弯曲空间的深层对称</title><link>https://s-ai-unix.github.io/posts/bianchi-identity/</link><pubDate>Sun, 22 Feb 2026 00:00:00 +0000</pubDate><guid>https://s-ai-unix.github.io/posts/bianchi-identity/</guid><description>从微分几何的核心恒等式到广义相对论的数学基础，用大一新生能听懂的语言，详解比安基恒等式的来龙去脉。</description></item></channel></rss>