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use new naming style and fix
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content/posts/agda_1.md

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title = "Agda 学习(一):完成简单证明的一切"
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title = "Agda 语言】形式化证明所需的主要设施"
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description = "类型论的实践:函数式程序推理与演算。Agda 中的证明、归纳、列表、Internal Verification 和等式理论。"
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date = 2025-11-12
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updated = 2025-12-13

content/posts/category_theory_1.md

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title = "范畴论(一):代数上的定义对应的泛性质"
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title = "范畴论】代数上常见定义对应的泛性质"
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description = "代数上的定义的范畴论观点:关于笛卡尔积,无交并,直积,直和,积空间,纤维积。"
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date = 2025-08-02
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updated = 2025-09-29

content/posts/category_theory_exercise_1.md

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title = "范畴论练习(一):定义验证与泛性质使用"
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title = "【范畴论】练习:定义验证与泛性质使用"
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description = "选做一些 Mac Lane 书上的习题(到 Ⅲ. Universals and Limits 的 1. Universal Arrows)。"
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date = 2025-12-05
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updated = 2025-12-08
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<style>
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img:where(.dark,.dark *) {
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--tw-invert:invert(100%);
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filter: var(--tw-blur,)var(--tw-brightness,)var(--tw-contrast,)var(--tw-grayscale,)var(--tw-hue-rotate,)var(--tw-invert,)var(--tw-saturate,)var(--tw-sepia,)var(--tw-drop-shadow,)
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filter: invert(100%);
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}
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</style>
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content/posts/complex_analysis_1.md

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title = "复分析(一):基本概念与 Cauchy 积分理论"
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title = "复分析基本概念与 Cauchy 积分理论"
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description = "复变函数基本概念的速通,从复值函数写到 Cauchy 公式及其推论。"
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date = 2025-07-27
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updated = 2025-11-16

content/posts/complex_analysis_2.md

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title = "复分析(二):间章:Laurent 级数、留数与调和函数"
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title = "复分析间章:Laurent 级数、留数与调和函数"
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description = "关于 Laurent 级数、留数与调和函数。"
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date = 2025-10-16
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updated = 2025-12-04

content/posts/cryptography_1.md

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title = "密码学(一):异或密码与 AES"
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title = "密码学异或密码与 AES"
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description = "使用 Haskell 完成的 The Cryptopals Crypto Challenges - Set 1"
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date = 2025-09-22
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updated = 2025-10-30

content/posts/cryptography_2.md

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title = "密码学(二):经典数论算法:基于有限域上离散对数/整数分解/二次剩余"
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title = "密码学经典数论算法:基于有限域上离散对数/整数分解/二次剩余"
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date = 2026-02-12
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[extra]

content/posts/field_theory_1.md

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title = "域论(一):高次方程与 Galois 理论"
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title = "【域论】高次方程与 Galois 理论"
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description = "关于高次方程的根式解:代数基本定理,低次方程求根公式,域扩张,Galois 扩张,Galois 群,根式可解性判断与 Abel-Ruffini 定理。"
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date = 2025-07-09
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updated = 2025-10-02
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只需证明非常值复系数多项式有根。以下给出 Frode Terkelsen 的一个简短且较为初等的证明。
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由分析[^continuous-mapping]知 $|P(z)|$ 有最小值,若最小值非零,不妨设其为 $|P(0)| = 1$
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设 $P(z) = 1+az^n+z^{n+1}Q(z), a\neq 0$
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由分析学[^continuous-mapping]知 $|P(z)|$ 有最小值,若最小值非零,不妨设其为 $|P(0)| = 1$. 不妨设 $P(z) = 1+az^n+z^{n+1}Q(z)$, 其中 $a\neq 0$.
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取 $\omega$,使 $a\omega^n < 0, |\omega Q(\omega)| < \frac{1}{2}|a|$,则有 $|P(\omega)|\leq 1+\frac{1}{2}|a|\omega^n<1$,矛盾。
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### 求根公式
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对于一、二次方程来说,求根公式(使用初等运算的复合给出所有根的公式)较为简单。
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Gerolamo Cardano 在 1545 年出版的著作 *Ars Magna* 中第一次给出三次方程的完整通解。考虑换元将原方程化为 $x^3+px+q=0$,令 $x=u+v$,此时只需同时满足
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Gerolamo Cardano 在 1545 年出版的著作 *Ars Magna* 中第一次给出三次方程的完整通解。考虑换元将原方程化为 $x^3+px+q=0$,令 $x=u+v$,此时只需同时满足
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$$
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\begin{cases}

content/posts/group_theory_1.md

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title = "群论(一):群在集合上的作用相关"
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title = "【群论】群在集合上的作用相关"
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description = "群在集合上的作用,Pólya 计数法,共轭作用与 Sylow 定理。"
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date = 2025-06-09
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updated = 2025-06-11

content/posts/group_theory_2.md

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title = "群论(二):魔方与次正规群列"
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title = "【群论】魔方与次正规群列"
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description = "换位子,半直积,Schreier 子群引理,可解群,导群,合成群列,Schreier 定理与 Jordan-Hölder 定理。"
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date = 2025-06-16
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updated = 2026-02-02

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