@user21820 Yeah, I ultimately gave it a pass on the basis of comments below the question which made it seem interesting. However, had I seen that question without the additional comments, I probably would have voted to close---I don't do number theory and the statement of the problem looks, on the surface, completely uninteresting to me.
Of course, lots of questions in number theory look completely uninteresting until you actually understand what they are asking
and then they all turn into the Prime Number Theorem or the Riemann Hypothesis
@quid @Did @amWhy @ZacharySelk @XanderHenderson: Crank is back with a totally irrelevant comment:
> Children from all over the world are wondering whether the emperor is wearing anything at all. peano公理定义数系问题? - Chen George的回答 - 知乎 zhihu.com/question/26438783/answer/343461121 – George ChenMar 16 at 18:43
This confused question should probably be closed. I don't think that the OP has the slightest idea what they are asking, and I doubt that they are going to be able to clarify.
@amWhy DNS problems. It took quite a while to figure out it was DNS problems, and then how to fix it. But it should be fixed now, so I will probably resume normal operation the next days. For now, however, it's time to go to bed. I'll sleep well with the expectation that things will work again.