The question is perfectly valid -https://math.stackexchange.com/questions/60050/find-a-function-f-mathbbr-to-mathbbr-that-is-continuous-at-precisely-o https://m

The question is perfectly valid -https://math.stackexchange.com/questions/60050/find-a-function-f-mathbbr-to-mathbbr-that-is-continuous-at-precisely-o https://math.stackexchange.com/questions/60050/find-a-functi... The paper notes GPT 4 can solve it (they seemed to have asked ChatGPT 3.5 - this paper is old by AI standards, the first version being from Dec 2023).