> For the complete documentation index, see [llms.txt](https://qiiingc.gitbook.io/fopp3/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://qiiingc.gitbook.io/fopp3/chap2.md).

# 第二章 与钢琴有关的信息

- [67.Mozart's Formula, Beethoven and Group Theory](https://qiiingc.gitbook.io/fopp3/chap2/67.mozarts-formula-beethoven-and-group-theory.md): (67) Mozart's Formula, Beethoven and Group Theory