What are the advantages of ending a proof with “QED”? As you know “QED” means “quod erat demonstrandum”, that is “what was to be shown” It makes proofs more readable Modern textbooks often conclude proofs with “which concludes the proof” or “which proves the assertion” or something It’s the same thing, “QED” and the square are just convenient shorthands
What is the meaning of the expression Q. E. D. ? Is it similar to . . . 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 practical matter it's very useful to have a definitive mark that indicates the proof is over
以「Q. E. D」收尾证明语段，是什么梗？ - 知乎 (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"
Why does drawing $\square$ mean the end of a proof? 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 associated this "quad" symbol with "quod"
有没有什么数学证明用的术语的英文或拉丁文？ - 知乎 其实吧，写英语并不一定比中文快多少。不过呢掌握一些基本的术语至少有有利于读书，我记得好像一前见过一本专门介绍这种术语的书，但是忘记名字了。列一些我知道的比较常见的拉丁语： a priori 先验的 以及与之相对的： a posteriori 后验的 a fortiori 这个不算数学术语吧，大概的意思是with the
在数学高考证明题中写下Q. E. D. 可能被判标记卷吗？ - 知乎 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，点下满分按钮