量子电动力学（QED，Quantum Electrodynamics） 是描述电磁相互作用的理论，可以说是目前为止最为精确的理论了。 在量子力学提出之后（主要标志为1926年薛定谔提出薛定谔方程）， …

Feb 19, 2015 · Putting QED after that sentence was their way of saying, "and that's what I was trying to prove, so there, I've proved it". We aren't so strict about proofs anymore, but as a …

May 31, 2019 · QED is short for the Latin phrase quod erat demonstrandum and means, loosely, "that which was to be shown". As noted in the comments, it's a summary way of saying that …

(also written QED and QED) is an initialism of the Latin phrase quod erat demonstrandum, meaning "what was to be demonstrated", or, less formally, "thus it has been demonstrated".

量子电动力学（QED）存在缺陷吗？ QED被认为是物理学中最成功的理论，其理论预测与实验数据高度符合。 既然如此，为什么一些电磁现象至今也没有好的理论解释？ 比如石墨烯的超导 …

Apr 21, 2017 · 0 I had always used QED (quod erat demonstrandum) at the end of a proof until I was introduced to using Halmos' symbol. Since it was a 4-sided symbol, my mind has always …

n.b.即 nota bene 注意 QED即 quod erat demonstrandum 证明结束 circa 大约 et al.即 et alia 表示和其他人，一般用于引用参考文献 etc.即 et cetera 等等。 q.v.即 quod vide参照， 一般用于引 …

全局对称性（Global Symmetry）与规范对称性（Gauge Symmetry）的区别 全局对称性和规范对称性是物理学中描述对称性的两种基本类型，它们在数学结构、物理意义和实验表现上存在根 …

众所周知 Q.E.D.是quite easily done的缩写 挥挥洒洒地终结证明，不经意间注记quite easily done，大佬的高考，往往就是这么朴实无华，且枯燥 而阅卷老师只会在佩服之余，点下满分 …

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