---
title: "Discussion on \"정수론 Chapter 7.4 - Möbius Inversion\" | Hashnode"
description: "Discussion on \"정수론 Chapter 7.4 - Möbius Inversion\". 이 글의 내용은 성균관대학교 권순학 교수님의 2019년 5월 9일 수업 내용을 재구성한 것입니다.\nMöbius function\n$$\n\\\\mu(x) = \\\\begin{cases}\n        1 &\\\\text{if } n = 1\n\\\\\\\\    0 &\\\\text{if } p^2 \\\\mid n \\;\\; \\\\text{for some prime p}\n\\\\\\\\    -1^t &\\\\text{if } n = \\\\prod_i^t p_i\n\\\\end{cases}..."
url: "https://hashnode.com/posts/2019-5-9-math-chapter-7-4/6629147deb03f8736a339be4"
---

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# [정수론 Chapter 7.4 - Möbius Inversion](https://kdy1.dev/2019-5-9-math-chapter-7-4?utm_source=hashnode&utm_medium=feed)

이 글의 내용은 성균관대학교 권순학 교수님의 2019년 5월 9일 수업 내용을 재구성한 것입니다. Möbius function $$ \\\\mu(x) = \\\\begin{cases} 1 &\\\\text{if } n = 1 \\\\\\\\ 0 &\\\\text{if } p^2 \\\\mid n \\;\\; \\\\text{for some prime p} \\\\\\\\ -1^t &\\\\text{if } n = \\\\prod\_i^t p\_i \\\\end{cases}...

May 9, 2019 · 2 min read · kdy1.dev  
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[DongYun Kang](https://hashnode.com/@kdy1)

@kdy1 · South Korea

  
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Creator of SWC

CEO of Delino. I created SWC, an open-source compiler project, and previously worked at Deno and Vercel.

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