这个定理描述很简单,证明也很简单,紫檀数学牛蛙都可以玩一玩(不要告诉孩子答案,让他们自己证明):
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 的证明(昨天在Android tablet app上问的):
https://bbs.wenxuecity.com/tzlc/1998524.html
虽然有错但离正确的证明只差一点点。
ChatGPT V2 (免费版)的证明:
https://bbs.wenxuecity.com/tzlc/1998342.html
我同事问了付费版的ChatGPT o1,更不靠谱,问两遍都是胡乱证明。
我今天在 Deepseek R 网页版又问一遍,完全错了。
简单证明见这里:Kelley's proof
https://en.wikipedia.org/wiki/Sylvester%E2%80%93Gallai_theorem