這個定理描述很簡單,證明也很簡單,紫檀數學牛蛙都可以玩一玩(不要告訴孩子答案,讓他們自己證明):
Say there are more than one finite number of points on a Euclidean plane, and they are not falling on a single straight line. Proof that there exists a straight line that goes through only two of those finite points.
Deepseek R 的證明(昨天在Android tablet app上問的):
https://bbs.wenxuecity.com/tzlc/1998524.html
雖然有錯但離正確的證明隻差一點點。
ChatGPT V2 (免費版)的證明:
https://bbs.wenxuecity.com/tzlc/1998342.html
我同事問了付費版的ChatGPT o1,更不靠譜,問兩遍都是胡亂證明。
我今天在 Deepseek R 網頁版又問一遍,完全錯了。
簡單證明見這裏:Kelley's proof
https://en.wikipedia.org/wiki/Sylvester%E2%80%93Gallai_theorem