$$ \operatorname{Tr}(A+B) \equiv \operatorname{Tr}(A)+\operatorname{Tr}(B) $$$$ \operatorname{Tr}(A B \ldots Y Z) \equiv \operatorname{Tr}(Z A B \ldots Y) $$$$ \gamma^{\mu} \gamma^{\nu}+\gamma^{\nu} \gamma^{\mu} \equiv 2 g^{\mu \nu} I $$...

Quantum Feild Theory Ryder Chapter 2 Single-particle relativistic wave equations...

Date start 2022-01-20 Le Petit Prince Chapter I ...

cover Name Time Progress 沙丘 2022.03.10-2022.03.12 100% 夏天、烟火和我的尸体 2022.05.12 100% 美国众神 2022.06.14-2022.06.16 100% 伽利略的苦恼 2022.07.09-2022.07.12 100% Charlie et la Chocolaterie 2022.07 100% Great Expectations 2022.08.02-2022.09.24 100%

AList My personal drive, based on this project. Physics folder username “liucy”, password “liucy”. Mathematics folder username “cyliu”, password “cyliu”. TE (The Economist magazine) folder username “TE”, password “theeconomist”. Code folder username “codecyl”, password “codecyl”. Languages folder username “cyllang”, password “cyllang”.

Android is based on linux kernel, so in theory Android system is able to accomplish many tasks in Linux. ...

内网穿透 最简单的方案为ssh端口转发，但是ssh断掉之后不会自动重连，我们需要autossh，它可以监控本地端口状态自动重连 ...

Group Theory for Physicists 2.2 Group and its Multiplication Table Symmetric Transformation: A transformation is called the symmetric transformation of a system if it preserves the system invariant. Definition of a Group: A group $G$ is a set of symmetric transformation with a defined multiplication of elements, and satisfies the following rules: ...

A visual introduction to differential forms and calculus on manifolds Chapter 1 Background material 1.1 Review of vector spaces vector spaces $u,v,w\in V$,$c,d \in \mathbb R$ $v+w=w+v$ $(u+v)+w=u+(v+w)$ $v+0=0+v$ $v+(-v)=0$ $1\cdot v=v$ $c\cdot (d\cdot v)=(c\cdot d)\cdot v$ $c\cdot(v+w)=c\cdot v+c\cdot w$ $(c+d)\cdot v=c\cdot v+d\cdot v$ ...